APAC 2007 - List of Keywords (linac)

A B C D E F G H I K L M O P Q R S T U V W

linac

Paper	Title	Other Keywords	Page
MOXMA01	Present Status of J-PARC	synchrotron, klystron, quadrupole, rfq	1
	F. Naito KEK, Ibaraki
	Japan Proton Accelerator Research Complex (J-PARC) is the high-intensity proton accelerator aiming to realize 1 MW class of the beam power. It is the joint project between High Energy Accelerator Research Organization (KEK) and Japan Atomic Energy Agency (JAEA). J-PARC consists of a 400MeV linac, a 3GeV Rapid Cycle Synchrotron (RCS) and a 50 GeV Main Ring (MR). At the present stage, the beam energy from the linac is 181 MeV and it will be extended to 400 MeV at the near future. Most components of the linac have been installed in the beam line, and the remaining preparation for the beam commissioning is underway. Since the beam commissioning of the linac will start in December 2006, the first result of the linac beam test will be reported at the conference. The beam commissioning for the RCS is scheduled in the middle of 2007. Finally that for the 50GeV synchrotron will be started at the beginning of 2009.
	Slides

MOXMA02	Commisioning Experience of SNS	target, injection, beam-losses, beam-transport	6
	M. A. Plum ORNL, Oak Ridge, Tennessee
	The Spallation Neutron Source accelerator complex consists of a 2.5 MeV H^- front-end injector system, a 186 MeV normal-conducting linear accelerator, a 1 GeV superconducting linear accelerator, an accumulator ring and associated beam transport lines. The linac was commissioned in five discrete runs, starting in 2002 and completed in 2005. The accumulator ring and associated beam transport lines were commissioned in two runs in February and April 2006. With the completed commissioning of the SNS accelerator, the facility has begun initial low-power operations. In the course of beam commissioning, most beam performance parameters and beam intensity goals have been achieved at low duty factor. A number of beam dynamics measurements have been performed, including emittance evolution, transverse coupling in the ring, beam instability thresholds, and beam distributions on the target. The commissioning results, achieved beam performance and initial operating experience of the SNS linac will be presented.
	Slides

MOYMA01	Overview of Energy-Recovery Linacs	electron, emittance, radiation, laser	11
	R. Hajima JAEA/ERL, Ibaraki
	An energy-recovery linac (ERL) is capable of generating an electron beam of high-brightness and high average current. It is, thus, a promising device for future light sources such as next-generation X-ray sources and high-power FELs, and several projects are under way in the world. In this talk, we overview the current status of these projects. Recent studies on beam dynamics issues and development of key components for the ERLs are also presented.
	Slides

MOOPMA02	Overview of Regional Infrastructure for SCRF Development	collider, controls, linear-collider, cryogenics	31
	C. Pagani INFN/LASA, Segrate (MI)
	The unanimous ICFA decision to choose the TESLA “cold” technology as the basis for the International Linear Collider, ILC, gave a global impulse to the superconducting RF, SCRF, technology. The perspective of building large accelerators based on high gradient superconducting cavities poses a number of new problems in term of performance reproducibility, large scale manufacturing and cost containment. In parallel with the ongoing R&D on basics in labs and universities, new large regional SCRF infrastructures are being developed to qualify treatment, assembly procedures and ancillary integration in performing cryomodules. US at Fermilab and Asia at KEK are strongly investing in these facilities and also Europe is considering duplicating and adjourning at CERN the operational facility set up at DESY by the TESLA Collaboration. In this paper the ongoing global effort on SCRF through the development of large regional infrastructures is outlined together with their status and plans.
	Slides

TUC3MA03	Ultimate Abilities of Conventional Positron Sources	positron, target, electron, acceleration	97
	P. V. Logachev, M. S. Avilov, M. B. Blinov, P. Martyshkin, T. A. Vsevolozhskaya BINP SB RAS, Novosibirsk
	Significant increasing of desired luminosity for future e⁺e^- colliders leads to corresponding enlargement of positron production rate. Conventional technology of positron production have not reached yet its technical limits. Experimental study in order to find out these limits for basic subsystems of positron source is presented in this paper.
	Slides

TUPMA022	Construction Progress of the SSRF Injector	booster, injection, synchrotron, synchrotron-radiation	133
	D. M. Li, H. H. Li, Z. Q. Shen, M. H. Zhao, Z. Zhao SINAP, Shanghai
	SSRF (Shanghai Synchrotron Radiation Facility) is a 3rd generation synchrotron radiation source facility under construction. To meet the full energy top-up injection requirements of 3.5GeV storage ring, the injector of SSRF was designed which consists of a 150 MeV linac, a two super-periods 28 cells FODO type booster and two transfer lines (LT and HT). The cycle rate of booster is 1~2 Hz. SSRF was started building in the end of 2004, and the commissioning of accelerator part will be completed in April 2008 according to schedule. The Booster will start the commissioning until Oct 2007. Now most of on-line installing components, power supplies, and instruments are under manufacture or purchasing for SSRF booster. In this paper, the description of SSRF booster design, the progress of booster and transfer lines construction are described. Keywords: SSRF; booster; construction

TUPMA026	A Prototype of the SSRF Power Supply Control System	controls, power-supply, storage-ring, booster	139
	J. G. Ding, L. R. Shen, H. Zhao, H. J. Zhu SINAP, Shanghai
	The Shanghai Synchrotron Radiation Facility (SSRF) is a third generation, 3.5GeV synchrotron light source currently being constructed at the Shanghai Institute of Applied Physics (SINAP) in Shanghai, China. There will be approximately 700 magnet power supplies (PS) in the storage ring, booster, linac and transport lines. According to the requirement of control precision, reliability and stability of the magnet power supplies, we decided to use the PSI-designed PS control system for PS control. Each magnet PS has a local digital controller for a digital regulation loop and a 5MHz optical point-to-point link to the VME level. The low-level EPICS interface is identical for all magnet power supplies. Industry Pack (IP) modules with standard carrier cards are used as VME interface with eight links per VME card. The VME-based front-end consists of a PowerPC7455 SBC board, IP carriers and IP I/O modules. A prototype of the PS control system has been setup and tested at SINAP. Control and monitoring of the prototype has been implemented with EPICS toolkit. This paper describes the progress and software development of the prototype, and discusses our near future plan.

TUPMA046	Future Light Source based on Energy Recovery Linac in Japan	gun, emittance, photon, factory	172
	T. Kasuga, T. Furuya, H. Kawata, Y. Kobayashi, S. Sakanaka, K. Satoh KEK, Ibaraki R. Hajima JAEA/FEL, Ibaraki-ken N. Nakamura ISSP/SRL, Chiba
	After extensive discussions on the future light source of the Photon Factory at High Energy Accelerator Research Organization (KEK), it has been concluded that a 5 GeV energy recovery linac (ERL) should be the most suitable candidate to foster cutting edge experiments and support a large variety of user needs from VUV to X-rays. On the other hand, Japan Atomic Energy Agency (JAEA), which has already built a low energy (17 MeV) ERL, also proposed its own 5-6 GeV ERL as a light source. These two institutes with a participation of the members of the Institute for Solid State Physics (ISSP) of the University of Tokyo agreed to promote an ERL-based next-generation synchrotron light source in Japan. In order to realize a 5 GeV ERL, it is necessary to construct a prototype ERL with an energy of ~200 MeV and develop several critical components such as electron guns and superconducting accelerating structures. We are planning to construct together the prototype ERL at the KEK site. An R&D team for the prototype ERL is going to be organized in collaboration with accelerator scientists from the other facilities, UVSOR and SPring-8.

TUPMA057	Physics Design of PAL-XFEL Undulator	undulator, radiation, electron, vacuum	190
	D. E. Kim, C. W. Chung, J.-S. Oh, K.-H. Park PAL, Pohang, Kyungbuk I. S. Ko POSTECH, Pohang, Kyungbuk
	Pohang Accelerator Laboratory(PAL) is planning a 0.3 nm – 0.45 nm SASE (Self Amplification of Spontaneous Emission) XFEL based on 3.7 GeV linear accelerator. It is targeting utilization of 0.1 nm X-ray radiation using the 3rd harmonic FEL radiation. With 3.7 GeV electron beam energy, achieving 0.3 nm fundamental FEL lazing is very challenging and it requires very low emittance electron beam with minimum energy spread. It also requires small period undulator with very small gap. In this context, application of SPring8 type in vacuum undulator is seriously considered. This reflects the experiences from SPring8 SCSS project. In this report, the physics design efforts of the undulator is described. The periodic parts are optimized to achieve the highest field with other requirements. The end structures were designed to be asymmetric along the beam direction to ensure systematic zero 1st field integral. The thickness of the last magnets were adjusted to minimize the transition distance to the fully developed periodic field. The final design features 4 mm minimum pole gap, 15 mm period, peak effective field of 1.09 Tesla.

TUPMA066	Energy Equalization by using S-band and X-band Accelerator Modules	simulation, positron, klystron, acceleration	205
	K. Yokoyama, T. Kamitani KEK, Ibaraki
	To reduce the beam loss and to restrict the expanse of the bunch length of the positron beam from the KEKB injector, the energy spread of ±0.25% or less is required for the beam transport line of the KEKB ring. Generally, the positron beam has a large energy spread because the original bunch length is large and all positrons do not see the same accelerating filed. Thus, an energy compression system which consists of six rectangular magnets and two 2-m S-band accelerating structures is implemented at the end of the linac but it has a demerit that the beam bunch is lengthened. We propose a new method to suppress the energy spread without enlarging the bunch length. This method utilizes the superimposed acceleration of the S-band modules and X-band modules.

TUPMA067	New Timing System for the L-band Linear Accelerator at Osaka University	laser, gun, single-bunch, electron	208
	S. Kashiwagi, G. Isoyama, R. Kato, S. Suemine ISIR, Osaka T. Asaka, Y. Kawashima JASRI/SPring-8, Hyogo-ken
	A highly precise and flexible timing system has been developed for the L-band linac at ISIR, Osaka University. It provides four RF signals and several timing signals for operation of the linac and for experiments with the linac. In order to realize long-term stability of the timing system and hence operation of the linac, a rubidium atomic clock producing a 10 MHz RF signal with the fractional stability of 10^-15 is used as a time base for a synthesizer used as a master oscillator for generating the acceleration frequency of 1.3 GHz. The 1.3 GHz signal from the master oscillator is directly counted to produce the four RF signals and the clock signal of the timing system at 27 MHz. The master timing signals for linac operation is taken from the AC line frequency and it is synchronized with the 27MHz clock signal precisely. To make an arbitrary delayed timing signal, a standard digital delay generator is used to make a gate signal for a GaAs RF switch, with which one of the 27MHz clock pulses is sliced out to generate the delay timing signal. Any timing signal can be made in an interval of 37 ns and the timing jitter of the delayed signal is achieved to be as short as 2 ps.

TUPMA070	Progress of RFQ Accelerator at Peking University	rfq, ion, ion-source, simulation	214
	Z. Y. Guo, J.-E. Chen, J. X. Fang, S. L. Gao, J. F. Guo, W. G. Li, Y. R. Lu, S. X. Peng, Z. Z. Song, Z. Wang, X. Q. Yan, J. X. Yu, M. L. Yu, C. Zhang, K. Zhu PKU/IHIP, Beijing
	The progress of two RFQ accelerators at Peking University is presented: one is Separated Function RFQ (SFRFQ), which separates the focusing and acceleration of traditional RFQ to get higher acceleration efficiency. The first prototype of the SFRFQ is designed to accelerate O+ from 1MeV to 1.5MeV and used as a postaccelerator for ISR RFQ-10⁰⁰ (Integral Split Ring) [1]. The other is high current deuteron 201.25MHz RFQ, it will accelerate 50mA D⁺ beam to 2MeV with a duty cycle of 10%. The design study of SFRFQ and high current Deuteron RFQ accelerator are outlined.

TUPMA075	Status of the CTF3 Frequency Multiplication Rings	electron, vacuum, injection, collider	217
	A. Ghigo, C. Biscari, F. Marcellini, M. Serio, A. Stella INFN/LNF, Frascati (Roma) R. Corsini, S. Doebert, G. Geschonke, L. Rinolfi, F. Tecker, P. Urschütz CERN, Geneva
	The CLIC Test Facility (CTF3) is in construction at CERN by an international collaboration to demonstrate the feasibility of two beam acceleration scheme at the CLIC parameters. The drive beam of the CTF3 is composed by a fully loaded Linac that generates a long bunch train and two rings that provide the high current and bunch frequency multiplication by interleaving bunch trains. The status of the commissioning of the first ring (Delay Loop) and of the transfer lines are reported together with the installation of the second ring (Combiner Ring).

TUPMA076	Design and Development of Beam Transport Elements for the BARC-ECIL Linac	gun, electron, target, focusing	220
	P. Roychowdhury, D. P. Chakravarthy, P. Jain, K. C. Mittal, A. K. Ray BARC, Mumbai
	A 10 MeV, 2 kW RF electron linac is under development for cargo scanning. It consists of electron gun, RF linac structure, solenoid focusing magnets, steering magnet, beam diagnostics and x-ray target. The beam diameter requirement at the target is 2mm. Since the beam is to be focused to a diameter of 2mm at the target; the transverse beam optics of the whole linac structure from gun end to the target has been simulated by solving the beam envelope equation. The beam envelope equation has been solved in radial direction by Runga-Kutta method consisting of external focusing field, RF fields, beam perveance and emittance. Various combinations of solenoid magnet focusing have been studied. It has been found that three solenoid magnets are required to focus the beam to a diameter of 2mm at the target, two between the electron gun and the linac entrance and the other between the linac exit and the target. Based on these studies two solenoid magnets has been designed and fabricated. Details of beam optics simulation results and the design of the solenoid magnets will be presented.

TUPMA085	LEIR: Towards the Nominal Lead Ion Beam	ion, injection, electron, vacuum	229
	M. Chanel, M.-E. Angoletta, V. Baggiolini, P. Belochitskii, A. Beuret, A. Blas, J. Borburgh, C. Carli, K. Cornelis, T. Fowler, M. Gourber-Pace, S. Hancock, C. E. Hill, M. Hourican, D. Kuchler, E. Mahner, D. Manglunki, S. Maury, M. M. Paoluzzi, S. Pasinelli, J. Pasternak, U. Raich, F. Roncarolo, C. Rossi, J.-P. Royer, M. Royer, R. Scrivens, L. Sermeus, G. Tranquille, M. Vretenar CERN, Geneva
	The Low Energy Ion Ring (LEIR) is a central piece for LHC ion operation at CERN, transforming long Linac3 pulses into high density bunches needed for LHC. The first phase of LEIR commissioning successfully attained its goal of providing the so-called 'early ion beam' (one bunch of 2.25 10⁸ Lead ions) needed for the first LHC ion runs with reduced luminosity. Studies in view of generating the beam needed for nominal ion operation (2 bunches of 4.5 10⁸ ions in LEIR) are being carried out in parallel with the setting-up of the early beam in the accelerators further downstream in the LHC injector chain. The main characteristics of the machine using a new state of the art electron cooler are discussed together with the latest results.

TUPMA088	High Power RF Testing of a Cell Coupled Drift Tube LINAC Prototype for LINAC4	coupling, klystron, vacuum, pick-up	232
	M. Vretenar, Y. Cuvet, F. Gerigk, J. Marques Balula, M. Pasini CERN, Geneva
	A Cell-Coupled Drift Tube Linac (CCDTL) accelerating structure at 352 MHz has been selected for the energy range 40 to 90 MeV of Linac4, a new injector linac for the CERN accelerator complex. With regard to a conventional DTL in this energy range this structure presents the advantages of lower construction cost and easier access, cooling and alignment of the focusing quadrupoles placed between tanks. A full-scale high-power prototype of about 1/3 of a complete module has been designed and built at CERN. It is fed by a waveguide input coupler of novel conception. This paper summarizes the main mechanical features of the prototype and reports the results of low-power and high-power RF testing.

TUPMA093	Thermo-structural Analysis of 400 KeV Deuteron RFQ Components	rfq, vacuum, pick-up, beam-transport	235
	P. Jain, R. Kumar, P. K. Nema, P. Singh, V. L.SR. sista BARC, Mumbai
	BARC is developing technologies for a high current low energy proton accelerator, which includes a 3MeV RFQ. As part of this, a 400 KeV prototype deuteron RFQ has been planned. This RFQ will also be utilized later to replace 14 MeV neutron generator at BARC. In this paper we are presenting Thermo-structural analysis of RFQ and features such as RF Coupler, Tuner, Vacuum port etc. This investigation will lead to design of local cooling schemes of these components. Parametric studies are also included in this paper. Feasible Cooling schemes which meet cooling requirements of components will also be discussed. e-mail:piyushj@barc.gov.in

TUPMA105	Transverse Matching of the SNS Linac Based on Profile Measurements	emittance, beam-losses, quadrupole, proton	250
	D.-O. Jeon, P. Chu ORNL, Oak Ridge, Tennessee
	For a high intensity linac such as the SNS linac, it matters to match to minimize the beam mismatch and potential beam loss. It was observed that matching was improved through the matching technique based on the beam profile measurements from wirescanners. *SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U. S. Department of Energy.

TUPMA108	Benchmarking of Multiparticle Phase Scan and Acceptance Scan Techniques for the SNS DTL	simulation, target, beam-losses, space-charge	253
	D.-O. Jeon ORNL, Oak Ridge, Tennessee
	For a high intensity linac such as SNS Drift Tube Linac, it matters to accurately determine the rf set-point of the tank rf field to minimize beam mismatch and potential beam loss. Two techniques were benchmarked which are multiparticle phase scan and acceptance scan techniques. Excellent agreement was obtained between the set-points obtained from the two techniques. The analysis of both techniques are based on multiparticle tracking using the Parmila code. *SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U. S. Department of Energy.

TUPMA109	Thermal-Induced Frequency Detuning of 350 MHz RFQ Structure	rfq, proton, controls, injection	256
	N. K. Sharma, S. C. Joshi, N. K. Sharma RRCAT, Indore (M. P.)
	A 350 MHz, 4.5 MeV RFQ structure is being studied for proposed High Power Proton Linac for Indian SNS. At high RF duty operation of RFQ due to RF induced heating the structure would be subjected to thermal deformations and hence the detuning of resonating structure from its designed resonating frequency. A detailed Thermal-Structural-Electromagnetic sequential analysis of RFQ has been performed using Multi-physics ANSYS (Finite Element Analysis Software). A cooling scheme has been worked out to get the efficient heat removal from the structure to minimize the thermal induced frequency shift. During analysis the parameters such as cooling water flow rate, cooling water inlet temperatures, cooling channel locations, cavity thickness etc. are varied to study the effect of these parameters on temperature distribution and associated frequency variation. The frequency shift is found highly sensitive to vane tip cooling parameters.

TUPMA119	Beam Line Design for PEFP User Facility	proton, target, vacuum, optics	271
	Y.-S. Cho, B. H. Choi, B. C. Chung, K. Y. Kim, K. R. Kim, Y.-H. Kim, Y. Y. Lee KAERI, Daejon
	In the Proton Engineering Frontier Project (PEFP), 20MeV and 100MeV proton beams from a 100MeV proton liner accelerator will be supplied to users for beam applications. The basic lattice for beam transport line will be FODO from the linac to the targets. Dipole magnets exited with shaped AC currents will distribute the beam from the linac to five targets simultaneously. To provide flexibilities of irradiation conditions for users from many application fields, we design beam lines to the targets with wide or focused, external or in-vacuum, and horizontal or vertical beams. The details of the beam line design will be reported.

WEXMA01	Status of KEKB and Upgrade Plan to SuperKEKB	luminosity, electron, positron, klystron	280
	M. Yoshida, T. A. Agoh, K. Akai, M. Akemoto, A. Akiyama, A. Arinaga, K. Ebihara, K. Egawa, A. Enomoto, J. W. Flanagan, S. Fukuda, H. Fukuma, Y. Funakoshi, K. Furukawa, T. Furuya, J. Haba, K. Hara, T. Higo, S. Hiramatsu, H. Hisamatsu, H. Honma, T. Honma, T. Ieiri, N. Iida, H. Ikeda, M. Ikeda, S. Inagaki, S. Isagawa, H. Ishii, A. Kabe, E. Kadokura, T. Kageyama, K. Kakihara, E. Kako, S. Kamada, T. Kamitani, K.-I. Kanazawa, H. Katagiri, S. Kato, T. Kawamoto, S. Kazakov, M. Kikuchi, E. Kikutani, H. Koiso, Y. Kojima, I. Komada, T. Kubo, K. Kudo, N. K. Kudo, K. Marutsuka, M. Masuzawa, S. Matsumoto, T. Matsumoto, S. Michizono, K. Mikawa, T. Mimashi, S. Mitsunobu, K. Mori, A. Morita, Y. Morita, H. Nakai, H. Nakajima, T. T. Nakamura, H. Nakanishi, K. Nakanishi, K. Nakao, H. Nakayama, S. Ninomiya, Y. Ogawa, K. Ohmi, Y. Ohnishi, S. Ohsawa, Y. Ohsawa, N. Ohuchi, K. Oide, M. Ono, T. Ozaki, K. Saito, H. Sakai, Y. Sakamoto, M. Sato, M. Satoh, K. Shibata, T. Shidara, M. Shirai, A. Shirakawa, T. Sueno, M. Suetake, Y. Suetsugu, R. Sugahara, T. Sugimura, T. Suwada, S. Takano, S. Takasaki, T. Takenaka, Y. Takeuchi, M. Tawada, M. Tejima, M. Tobiyama, N. Tokuda, S. Uehara, S. Uno, N. Yamamoto, Y. Yamamoto, Y. Yano, K. Yokoyama, Ma. Yoshida, S. I. Yoshimoto, K. Yoshino KEK, Ibaraki
	The KEKB is an electron-positron two-ring collider for the leading B meson factory. It consists of an 8 GeV electron ring (HER) and a 3.5 GeV positron ring (LER) and their injector linac. It has been operated since December 1998, and has recently marked the peak luminosity of 16.52 /nb/s. This peak luminosity is obtained under the crab-ready beam optics having the robust operating condition by some efforts to solve the optics problems. The integrated luminosity has also recently exceeded 1.2 /fb /day under the continuous injection mode. We are aiming more luminosity improvement after the crab cavity installation. Further the major upgrade plan for SuperKEKB is expected to achieve 400 /nb/s keeping the baseline of the original proposal and another upgrade plans are also considered towards over 10⁰⁰ /nb/s based on the recent beam-beam simulation. This paper describes the recent status of KEKB and upgrade plans for SuperKEKB.
	Slides

WEXMA02	The BEPCII: Construction and Initial Commissioning	cryogenics, luminosity, positron, vacuum	285
	C. Zhang, Q. Qin IHEP Beijing, Beijing
	As a natural extension of the Beijing Electron-Positron Collider (BEPC), the BEPCII project has started its construction since the beginning of 2004. The BEPCII will operate in beam energy of 1-2.1 GeV, its design luminosity is 110³³cm-²s-¹ at 1.89 GeV with double-ring structure. The upgraded collider will also serve as a synchrotron radiation source with higher beam energy and intensity than the BEPC. Some key technologies, such as superconducting RF system, low impedance vacuum devices, superconducting micro-beta quadrupoles, etc. are developed. The injector linac reached its design specification by the summer of 2006. Most storage ring components have been manufactured, installed and tested. The final checkout of the storage ring subsystems is underway. For the delay of the cryogenic and high current test of the superconducting quadrupoles, the commissioning of the storage rings will be started with normal magnets in the interaction region in autumn of 2006. The project is scheduled to complete in 2008. This paper will present the updated status and preliminary commissioning results of the BEPCII. For the BEPCII team
	Slides

WEZMA01	Upgrades to the ISIS Spallation Neutron Source	target, proton, synchrotron, rfq	300
	C. R. Prior STFC/RAL/ASTeC, Chilton, Didcot, Oxon
	With studies of a European Spallation Source (ESS) suspended and high-level discussions taking place over the future of neutrons in Europe, efforts are being made to ensure the sustained success of ISIS well into the foreseeable future. Recent developments include upgrading the injector by replacing the Cockcroft Walton with an RFQ, and installation of a new dual harmonic RF system that should eventually enable up to 50% more protons to be accelerated in the ring. A programme of ion source development also aims at improved reliability, enhanced beam current and longer life-time. This promise of more beam power has led to construction of a second target station providing users with additional experimental facilities starting in October 2008. In the longer term, ideas are forming either for a new high intensity proton driver or for a phased development of ISIS to the 5MW level. As an alternative to generating neutrons, such a machine might also be part of a neutrino factory, a complex of accelerators generating neutrinos from muon decay. This paper describes these activities and identifies their relative importance on an international development scale.
	Slides

WEZMA02	China Spallation Neutron Source Design	target, injection, proton, dipole	310
	J. Wei BNL, Upton, Long Island, New York S. X. Fang, S. Fu, H. F. Ouyang, Q. Qin, H. Qu, J. Tang, S. Wang, X. Xu IHEP Beijing, Beijing J. Feng, Q. W. Yan, J. Zhang, Z. Zhang IPHY, Beijing F. W. Wang Institute of Physics, Chinese Academy of Sciences, Beijing
	The China Spallation Neutron Source (CSNS) is a newly approved project to be constructed in Guangdong, China. The accelerator complex consists of an H^- linear accelerator and a rapid cycling synchrotron accelerating the beam to 1.6 GeV at 25 Hz repetition rate. The primary challenge is to build a robust and reliable user’s facility with upgrade potential at a fraction of “world standard” cost. During the past years, major iterations were made on the design of CSNS accelerator systems. This paper summarizes the machine design and discusses rationale of design revisions.
	Slides

WEZMA03	High Power Proton Accelerator in Korea	proton, rfq, radiation, site	315
	B. H. Choi, S. An, Y.-S. Cho, B. C. Chung, J.-H. Jang, J-Y. Kim, K. Y. Kim, K. R. Kim, H.-J. Kwon, Y. Y. Lee, J. W. Park KAERI, Daejon
	A high power proton accelerator project, Proton Engineering Frontier Project (PEFP), as one of the 21C Frontier Projects conducted by Korean Government, has goals to develop a 100MeV high current proton linear accelerator, its beam utilization and industrial applications. As the front end of the 100MeV accelerator, a 20MeV linear accelerator consisted of a 50 keV proton injector, a 3 MeV RFQ, a 20 MeV DTL, was completed and tested. The rest part of the accelerator and various beam lines for beam utilizations are under construction, and also a site preparation and construction works are under progresses in cooperation with Gyeongju city. In parallel proton beam utilization and accelerator application technologies are extensively studied and under development. In this paper the status and the future plan of the project including test results of the 20MeV accelerator, site preparation and construction works, and development of proton beam utilization and user program will be presented in detail.

WEZMA05	Status and Plans for the TRIUMF ISAC Facility	target, ion, ion-source, cyclotron	325
	P. Schmor TRIUMF, Vancouver
	The ISAC facility at TRIUMF uses the ISOL technique to create exotic isotopes in a thick target mainly through spallation from 500 MeV protons. The ISAC target area has operated for isotope production with up to 50 kW of beam power from the TRIUMF 500 MeV cyclotron. An ion beam formed from these exotic isotopes is transported at energies either to a linac for further acceleration or to any one of a suite of low energy experimental stations. For accelerating the isotopes an RFQ is followed by a five-tank drift tube linac that provides variable-energy accelerated exotic-beams from 0.15 to 1.8 MeV/u, primarily for nuclear astrophysics experiments. Twenty super conducting rf cavities have been recently added to the linac chain and commissioned with beams of stable isotopes, to increase in the maximum energy of the exotic beams to 4.3 MeV/u. Another 20 cavities will be added in 2009 to bring the energy to 6.5 MeV/u. A second proton beam line from the cyclotron and new target station for target and ion source development have been proposed for ISAC. In the future this new target station could be used as an independent simultaneous source of exotic beams for the experimental program.
	Slides

WEC3MA01	Experimental Verification of Halo Formation Mechanism of the SNS Front End	optics, emittance, simulation, beam-losses	333
	D.-O. Jeon ORNL, Oak Ridge, Tennessee
	A new halo formation mechanism predicted by the simulation study was confirmed through a series of emittance measurement during the SNS Linac commissioning. The rms emittance and beam tail were greatly suppressed by the cure of transverse optics change. Detailed analisys and comparison of emittance measurement and simulation are presented here. *SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U. S. Department of Energy.
	Slides

WEPMA011	Design and Operating Experience of Triode Electron Guns for Industrial Electron Accelerators	gun, electron, cathode, emittance	348
	A. Jain, A. R. Chindarkar, K. C. Mittal BARC, Mumbai
	The Accelerator and Pulse Power Division of BARC is presently constructing three industrial electron accelerators for radiation applications. a) a 500 keV, 10 KW Cockcroft-Walton accelerator b) a 10 MeV ,10 KW RF electron linac and c) a 3 MeV, 30 KW DC machine. While the DC accelerators require an almost parallel beam with less than 0.5 degree divergence, the RF linac gun requires a 50 keV , 2 ampere pulsed beam of low emittance Using relativistic electron optics, including space charge effects, very simple triode gun designs with flat cathode, grid and anode apertures which fulfill these requirements and are easy to fabricate experimentally are described. Our operating experience with these guns will also be described.

WEPMA035	Degradation of the Beam passing through Idle Coupled Cavities	impedance, proton, coupling, injection	369
	Y. Shobuda JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken S. Machida STFC/RAL/ASTeC, Chilton, Didcot, Oxon
	Effects of wake fields on high intensity proton beam are studied, when it passes through idle coupled cavities. There is the same number of frequencies as the number of gaps that consist on the coupled cavity. Since cavities are designed for the accelerated beam, the shunt impedance for each mode is different from the designed value, when the beam is not accelerated. This change of shunt impedances reduces the detuning effect for the reduction of beam degradation.

WEPMA044	Program for the Generation of High-Current RFQ	rfq, emittance, space-charge, focusing	381
	V. L.SR. sista, T. Basak, R. Pande, S. Roy, P. Singh, S. C.L. Srivastava BARC, Mumbai
	In general design of the linear accelerators, the beam dynamics parameters are calculated from data describing the accelerator structure. In this approach, the desired phase advances (beam dynamics parameters) are obtained after several iterations of structure parameters. A program has been written for the generation of RFQ Linac, which is based on choosing the zero current transverse and longitudinal phase advances. Given the zero current transverse and longitudinal phase advances, the structure parameters are calculated using the analytical formulae. In this paper, we discuss the design of the high current RFQ using this procedure and compare it with that obtained from the standard codes. email: svlsr@barc.gov.in

WEPMA050	BPM (Beam Position Monitor) in the PAL Linac and BTL	feedback, electron, pick-up, controls	393
	S.-C. Kim, J. Choi, Y. J. Han, J. Y. Huang, D. T. Kim, W. W. Lee, H. J. Park PAL, Pohang, Kyungbuk
	In Aug. 2004, thirteen BPMs are installed at BTL (Beam Transport Line), and later in Aug. 2005, three BPM installed at main linac for beam trajectory measurement and feedback. BPMs for the BTL consist of 100mm strip-line electrodes in 150mm long chamber and uses SMA-R type feed-throughs. BPMs of the Linac consist of 57mm strip-line electrodes in 100mm short chamber and SMA-R type feed-throughs. 500MHz log-ratio signal processing circuits are used for the Linac and BTL BPM electronics. BPM data acquisition system is developed as an EPICS IOC by using NI S-series DAQ board and NI LabView 7.1. Best read-out accuracy of BPM system is measured as 20mm including BPM electronics. In this paper, we describe on the status of the BPM and its characteristics for PAL Linac and BTL.

WEPMA063	Diagnostic Supports for Top-Up Operation at TLS	injection, diagnostics, synchrotron, storage-ring	410
	K. H. Hu, J. Chen, K. T. Hsu, C. H. Kuo, C.-J. Wang NSRRC, Hsinchu
	Routine top-up operation of Taiwan Light Source (TLS) was started from October 2005. Various diagnostics tools are needed to support the top-up operation. These tools include diagnostics for injection efficiency, filling pattern, tune, instability, loss pattern measurement. Design consideration, details and future plans of these diagnostics will be summary in this report.

WEPMA071	The Design, Fabrication and Performance Testing of the Analog I/Q RF Control System at NSRRC	controls, feedback, klystron, booster	422
	M.-S. Yeh, L.-H. Chang, F.-T. Chung, Y.-H. Lin, Ch. Wang NSRRC, Hsinchu
	An analog low-level RF system, based on an I/Q modulator and demodulator, has been tested at NSRRC. The I/Q RF control system has the same function blocks as the digital low-level RF system, which we plan to develop for our proposed 3-GeV light source machine. This analog I/Q RF system provides a real function structure to verify the working principle, block functions and performance evaluation of the developing digital low-level RF system. This work presents the designed function diagrams, the measured results for the characteristics of the main RF components, and the performance testing of the analog I/Q RF control system with a dummy cavity.

WEPMA073	Control System based on PCs and PLCs for the L-band Linac at Osaka University	controls, power-supply, electron, klystron	425
	R. Kato, G. Isoyama, S. Kashiwagi, S. Suemine, T. Yamamoto ISIR, Osaka
	The L-band electron linac at the Institute of Scientific and Industrial Research (ISIR), Osaka University, has been remodeled for higher stability and reproducibility of operation. A computer control system has been newly introduced for the linac not only to realize precise reproducibility of operation but also to make routine operation possible by even an unskilled operator. The new control system is based on personal computers (PCs) and programmable logic controllers (PLCs). The PCs and the PLCs are connected with networks using two different communication protocols. As the network connecting the PLCs, we have chosen FL-net, which is an open PLC network for factory automation. On the other hand, the PCs communicate each other with Ethernet. In order to transfer control information between these two networks with different protocols, one of the PCs is equipped with both FL-net and Ethernet and works as a gateway server. The PC converts data in the common memory in FL-net to the form accessible to the other PCs and vice versa. In this paper, we present details of the control system and operational experiences.

WEPMA075	Improvement of Web-Based Monitoring of EPICS-IOC for PAL Control System	monitoring, controls, site, acceleration	428
	J. M. Kim, K. M. Ha, H.-S. Kang, J. H. Kim, E.-H. Lee PAL, Pohang, Kyungbuk
	We are now operating a web-based monitoring system of PAL control system with MAC Power PC. In order to expand the IOC’s web-based monitoring system, we are trying to use the X86/Linux platform. With the experience which we got in developing the web-based monitoring of EPICS-IOC based on MAC Power PC, a web-based monitoring system with an X86 Intel PC based on a new concept has been developed for lower costs, easier access and use. Its operating system employs Linux Fedora Cor·10⁴. In order to drive the web-based monitoring system, EPICS Base 3.14.8 and MySQL 4.0 have been installed in the Linux Fedora Core 4. Archive engine with C language and EPICS channel access library are programmed to store the data. As a result of using the web-based monitoring system based on the X86 Intel PC, we have achieved its easier access and use, more convenient maintenance. Performance of the web-based monitoring system with an X86 Intel PC will be discussed.

WEPMA078	HTS-ECRIS and Low Energy Beam Transport System of the High Current Injector	ion, extraction, ion-source, electron	434
	G. Rodrigues, R. Ahuja, D. Kanjilal, P. Kumar, P. S. Lakshmy, A. Mandal, Y. Mathur, D. Naik, A. Roy, U. Unnam IUAC, New Delhi
	A high performance electron cyclotron resonance ion source (ECRIS) called PKDELIS capable of operation at 14.5 and 18 GHz and which uses High Temperature Superconducting (HTS) coils designed jointly by IUAC, Delhi (earlier called NSC), Pantechnik, Caen and ISN, Grenoble is presently in operation. The source is very suitable for operation on a 400 kV high voltage platform for injecting beams from the High Current Injector (HCI) into the Superconducting Linear Accelerator Booster. In the low energy beam transport (LEBT) system of the HCI, the beam extraction and transport becomes more and more challenging. In order to avoid the losses of the beam, the complete transport system is being made as short as possible. In addition, due to the high currents (~10 mA) extracted, the extraction system needs proper cooling requirements and possibility of movement of the electrodes for tuning various A/q beams. Typical axial and radial bremstraahlung spectra have been measured from the ECR plasma. Details will be discussed and further measurements are being explored to obtain a better understanding.

WEPMA080	Control System for the Bending MPS at PLS Linac	controls, power-supply, monitoring, klystron	437
	J. H. Kim, J. Choi, K. M. Ha, J. Y. Huang, H.-S. Kang, J. M. Kim, S.-C. Kim, I. S. Ko PAL, Pohang, Kyungbuk
	The former control system of the bending MPS (Magnet Power Supply) has a three-layered architecture. It was developed by in-house members in early 1993. It is upgraded based on EPICS as the protocol for the full upgrade of the PLS control system. We have replaced the former VME 68K CPU boards with OS-9 to new Power CPU boards operated by VxWorks as IOC in the linac klystron gallery. The upgraded bending MPS control system consists of a MVME5100 EPICS IOC core in the lower level control. It is implemented with the MEDM tool of EPICS to provide friendly Graphical User Interfaces. This paper describes the VME IOC and OPI and embedded local controller in MPS cabinet used for the bending MPS control in the PLS linac Pohang Accelerator Laboratory, Pohang, 790-784, KoreaThis works supported by the Ministry of Science and Technology, Korea.

WEPMA083	Design of C-band Standing-wave Accelerating Structure	coupling, bunching, electron, resonance	440
	S. H. Kim, M.-H. Cho, W. Namkung, B. Park, H. R. Yang POSTECH, Pohang, Kyungbuk S. D. Jang, J.-S. Oh, S. J. Park, Y. G. Son PAL, Pohang, Kyungbuk
	We design a C-band standing-wave accelerating structure for a compact electron linac. It is capable to produce electron beams with the beam energy of 4 MeV and the pulsed beam current of 50 mA. It is to be operated in the π/2 mode with the on-axis coupled structure. The beamline is composed of the E-gun and the accelerating column with 3 and half bunching cells and 9 and half normal cells. We design standing-wave RF cavities using the OMEGA3P code to implement the asymmetric magnetic coupling slots. For the beam dynamics study, we use the PARMELA code with the SUPERFISH fields configuration. Without the pre-buncher cavity and the focusing magnets, the lost beam power to the wall is 10 kW for the output beam power of 200 kW, while the transmission is 58%.

WEPMA096	Rejuvenation of Linac Control System for TLS	controls, booster, gun, vacuum	458
	C. Y. Wu, J. Chen, K. T. Hsu, S. Y. Hsu, K. H. Hu, J.-Y. Hwang, C. H. Kuo, D. Lee, K.-K. Lin, C.-J. Wang NSRRC, Hsinchu
	The pre-injector control system is a turn-key system, which was deployed 15 years ago. It is complicated and out-of-date nowadays in terms of system integration and hardware upgrading. It must be modernized to ensure its performance and reliability, and most importantly, to facilitate system maintenance. Modernization involves upgrading to enhance functionality, to prevent obsolesce of out-of-date control modules, and to replace old parts. The purpose of the upgrade plan is to replace the pre-injector control system by a new unit which has the same control environment as that of the main control system of the NSRRC accelerator facilities. Thus, the control system maintenance, as a whole, will be made substantially easier than the original system.

WEPMA103	The Design And Performance of the Prototype Digital Feedback RF Control System For the PLS Storage Ring	controls, feedback, resonance, proton	464
	I. H. Yu, J. Y. Huang, H.-S. Kang, D. T. Kim, H. Y. Kim, S.-C. Kim, I. S. Park PAL, Pohang, Kyungbuk
	The digital feedback RF control system for the Proton Engineering At the Pohang Light Source (PLS) Storage Ring, the low level RF system based on analog technique provides RF field control for the 4 RF stations, and each station drives each RF cavity at 500.082MHz. To achieve better control system stability and accuracy, the prototype digital feedback RF control has been developed in Pohang Accelerator Laboratory (PAL). In addition to RF field control, it provides cavity resonance control, and incorporates the personnel and machine protection functions. An accelerator electric field stability of ± 0.5% in amplitude and ± 0.5° in phase is required for the RF system. In order to accomplish these requirements, a digital feedback control technique is adopted for flexibility of the feedback and feed forward algorithm implementation. In this paper, the design and performance of this system will be presented with the performance test results.

WEPMA105	High Power Test of C-band Accelerating System for Japanese XFEL Project	klystron, power-supply, vacuum, collider	470
	K. Shirasawa, T. Inagaki, H. Kitamura, T. Shintake RIKEN Spring-8 Harima, Hyogo H. Baba, H. Matsumoto KEK, Ibaraki S. Miura MHI, Hiroshima
	?The C-band (5712 MHz) choke-mode type accelerating structure will be used for SCSS: SPring-8 Compact SASE Source project. Since the C-band accelerator generates higher accelerating gradient than traditional S-band accelerator, it makes the machine size compact and the cost low. In order to confirm the performance of the C-band accelerating system for the 8 GeV XFEL machine, the system including the same accelerating structure and RF system have been installed in the SCSS prototype accelerator. The first SASE amplification was observed at 49 nm on June 2006. In the prototype machine, four 1.8 m long C-band accelerating structures are used to accelerate electron up to 250 MeV. The C-band accelerator?unit has one 50 MW klystron and pulse compressor, where two types of pulse compressors: SKIP and SLED were adapted. After 300-hour RF conditioning, accelerating gradient up to 32 MV/m was achieved and we confirmed there is no serious problem. Now we continue the RF conditioning to get higher accelerating gradient and find the practical limit. In this paper, we would like to report on the RF conditioning and the achieved performance of the C-band accelerator.

WEPMA109	Positron Injector Accelerator and RF System for the ILC	positron, target, electron, photon	473
	J. W. Wang, C. Adolphsen, V. Bharadwaj, G. B. Bowden, E. N. Jongewaard, Z. Li, R. H. Miller, J. Sheppard SLAC, Menlo Park, California
	Due to the extremely high energy deposition from positrons, electrons, photons and neutrons behind the positron target, and because a solenoid is required to focus the large emittance positron beam, the 1.3 GHz pre-accelerator has to use normal conducting structures up to energy of 400 MeV. There are many challenges in the design of the normal-conducting portion of the ILC positron injector system such as obtaining high positron yield with required emittance, achieving adequate cooling with the high RF and particle loss heating, and sustaining high accelerator gradients during millisecond-long pulses in a strong magnetic field. Considering issues of feasibility, reliability and cost savings for the ILC, the proposed design for the positron injector contains both standing-wave (SW) and traveling-wave (TW) L-band accelerator structures. A short version of the new type of the SW section is under fabrication and testing, an updated status report is given. This paper also covers the acceleration vs. deceleration for pre accelerator sections, SW vs. TW structures, as well as the longitudinal matching from target to linac and linac to damping ring. * Work supported by U. S. Department of Energy, contract DE-AC02-76SF00515.

WEPMA111	Mechanical Engineering Challenges in the Development of the FEL at RRCAT	undulator, vacuum, gun, laser	479
	S. Chouksey, S. Krishnagopal, V. Kumar, S. Lal, K. K. Pant, V. Prasad RRCAT, Indore (M. P.)
	The Compact Ultrafast TErahertz Free-Electron Laser (CUTE-FEL) is being developed by BP&FEL Laboratory, RRCAT, which is designed to lase around 80 mm. Sub-systems like S-band high gradient accelerating structures, pre-buncher, buncher, pure permanent undulator etc. have already been developed and others are in advanced stage of fabrication/commissioning. In this paper we present the design, fabrication, measurements and status of various prototype developments of structures.

WEPMA122	Design and Development of 30 MeV, 3 kW RF Electron LINAC	electron, target, coupling, acceleration	491
	V. T. Nimje, D. Bhattacharjee, K. Dixit, D. Jayaprakash, K. C. Mittal, A. K. Ray BARC, Mumbai
	A 30 MeV, 3 kW RF Electron linac for neutron generation is being designed and developed. The Design parameters, beam studies etc. will be described in this paper.

WEPMA124	Preliminary Design, Analysis and Manufacturing Aspects of Low Beta 350 MHz Reentrant Superconducting RF Cavity	rfq, proton, cryogenics, beam-transport	497
	D. K. Mishra, M. Bagre, P. R. Hannurkar, V. Jain, G. Mundra, M. Prasad, A. Puntambekar, P. Shrivastava RRCAT, Indore (M. P.)
	A superconducting reentrant cavity for low beta, high intensity beam has been designed using SUPERFISH and MAFIA. The study has been done for cavity shape optimization considering the minimization of surface fields. Further its structural design has been done and feasibility study of different manufacturing aspects has also been done. A full-scale mild steel model with copper coating has been fabricated. A twin arm mechanical tuner has been designed for slow tuning by elastic deformation. This was tested with low power RF to validate the design parameters and to check the tuning sensitivity. In this paper the design and development activity of the reentrant superconducting will be discussed

WEPMA132	Superconducting Niobium Resonator Fabrication And Testing At IUAC	electron, coupling, controls, proton	500
	P. N. Prakash, D. Kanjilal, K. K. MISTRI, A. Roy, S. S.K. Sonti, J. Zacharias IUAC, New Delhi
	Superconducting niobium resonator fabrication and testing facilities have been developed at Inter-University Accelerator Centre. The facilities are used to construct niobium resonators for the superconducting booster linac as well as for future accelerator development projects. In the first phase a single quarter wave resonator (QWR) was successfully fabricated and tested. In the second phase two completely indigenously built QWRs were constructed. In cold tests at 4.5 K one of them performed at 3.5 MV/m with 3.5 W RF input power, exceeding the nominal design goal. After the successful completion of this project production of fifteen QWRs for the 2nd and 3rd linac modules began. This work has progressed sufficiently and we plan to complete the production by mid ‘2007. In addition to resonator fabrication the facilities have been used for other developments such as a new design of niobium-stainless steel transition assembly, slow tuner modifications, and repairing of the existing QWRs. Details of the activities and performance of the resonators will be presented.

WEPMA135	Mechanical Analysis and Design of the PEFP Low Beta Cavity	controls, simulation, superconducting-RF, radiation	506
	S. An, Y.-S. Cho, B. H. Choi KAERI, Daejon
	Proton Engineering Frontier Project (PEFP) Linac employs the superconducting RF cavity of β=0.42 to accelerate the proton beam with repetition rate of 60 Hz. In order to control the Lorentz force detuning effect, a stiffening structure with double rings and cones is designed for PEFP low beta cavities. This stiffening structure can reduce Lorentz force detuning coefficient to be lower than 1 Hz/(MV/m)2. The cavity’s mechanical modes are calculated by using ANSYS 2-D model and 3-D model. The calculation results demonstrate that PEFP Low Beta Cavity has no dangerous mechanical modes for 60 Hz pulse repetition. The mechanical stability of the SRF cavity is analyzed under the atmosphere pressure after being pumped down and under the helium liquid pressure after being cooled down. *This work is supported by the 21C Frontier R&D program in the Ministry of Science and Technology of the Korean government.

WEPMA137	Design and Simulation of Multibeam Klystron Cavity	klystron, simulation, coupling, vacuum	509
	A. K. Tiwari, R. K. Arora, P. R. Hannurkar RRCAT, Indore (M. P.)
	The klystron amplifier is capable of providing maximum power per unit length. A number of klystrons may be paralleled to get more power output and increased redundancy but phase matching at output remains a troublesome part of any such arrangement. Multibeam klystron provides a solution where all the beams are accelerated through a common voltage and interaction takes place in a common structure namely multibeam cavity so the problem of phase matching no longer exists. The advantage of MBK is low perveance for individual beams and hence higher efficiency. The design and simulation of a multibeam klystron cavity with four beams is presented using electromagnetic code Microwave Studio. R/Q at frequency 350MHz is optimized. The cavity simulated is to be used in 350 MHz, 250 kW CW klystron. This klystron will be used for 100 MeV proton Linac for Spallation Neutron source (SNS). Important Simulation results are described.

WEPMA139	Development of High-power Microwave Devices in Toshiba	klystron, electron, vacuum, cathode	511
	K. Hayashi, M. Irikura, Y. Okubo, H. Urakata TETD, Otawara M. Y. Miyake Toshiba, Yokohama
	Vacuum microwave devices continue to be essential for high-power RF accelerator systems and plasma heating or current drive systems for fusion experimental devices. Klystrons are suitable for use in amplification at the frequency ranges from 300 MHz to X band, while gyrotrons are mainly utilized in the millimeter wave range. Input couplers also play an important role in the building of acceleration cavity systems. TETD (Toshiba Electron Tubes & Devices Co., LTD.) has been developing these vacuum microwave devices in collaboration with some Japanese research institutes. Two kinds of long-pulse klystron for the J-PARC project were developed in collaboration with KEK and JAEA, which each have their operation frequencies, 324 MHz and 972 MHz. Both tubes output 3 MW with the pulse duration of 0.62 ms at the repetition frequency of 50 pps. They have a triode-type electron gun and same beam parameters and operate with an anode-modulating mode to reduce the cost of the power supply system.

THXMA02	Linear Accelerator Designs for the Upgrade of the CERN Proton Injector Complex (Linac4, SPL)	injection, proton, ion, luminosity	529
	M. Vretenar, G. Bellodi, R. Garoby, F. Gerigk, K. Hanke, A. M. Lombardi, S. Maury, M. Pasini, C. Rossi, E. Zh. Sargsyan CERN, Geneva
	Looking beyond the commissioning of the LHC, which is expected to start at the end of 2007, CERN is setting up its scientific plan for the years to come. The concerns about the reliability of the old LHC injectors and the need to progressively remove the technical bottlenecks towards higher luminosity in the LHC have initiated a reflection on the design of the main elements of the LHC injection chain. A plan under consideration foresees in the years 2007-2010 the construction of a 160 MeV H− linear accelerator, Linac4, injecting into the old 1.4 GeV PS Booster (PSB). In a second stage, the PSB could be replaced by a superconducting linac, the SPL, at an energy between 3.5 and 5 GeV. The Proton Synchrotron (PS) would be in turn replaced by a new PS2 reaching a higher energy of 50 GeV. Linac4 and SPL can operate at a higher duty cycle than needed for LHC injection, allowing functioning as a high-intensity facility for neutrino or radioactive ion physics at a later stage. This paper describes the design of the two linear accelerators involved in this upgrade strategy, Linac4 and SPL, and outlines some results of the R&D programme aimed at preparing the construction of Linac4.
	Slides

THYMA02	Progress in Understanding the High-gradient Limitations of Accelerating Structures	linear-collider, collider, emittance, damping	544
	W. Wuensch CERN, Geneva
	CLIC main linac accelerating structures have extremely demanding high-gradient, high-power and wakefield performance requirements. The research program which has been put into place to develop such structures, as well as recent experimental and technological results are described. The current understanding of the effects which both limit the ultimate accelerating gradient and fix the practical operating gradient is presented.
	Slides

THYMA04	Development of Quarter Wave Resonators	controls, coupling, damping, vacuum	554
	A. Roy IUAC, New Delhi
	The accelerating structure for the superconducting linac booster for the 15 UD Pelletron at IUAC is a Nb QWR cavity, designed and fabricated as a joint collaboration between IUAC and ANL, USA. Initial cavities required for the first linac module were fabricated at ANL. For fabrication of cavities required for future modules a Superconducting Resonator Fabrication Facility has been set up at IUAC. Three quarter wave resonator (QWR) cavities have been fabricated and fifteen more resonators for the second and third linac modules are in advanced stage of completion. This facility has allowed us to undertake repairs on some of the resonators which sprung leaks. First experiment with the accelerated Si beam through the first linac module having eight resonators along with a superconducting solenoid have been conducted recently.
	Slides

THYMA05	Low-level RF Control System Design and Architecture	feedback, controls, simulation, klystron	559
	L. R. Doolittle LBNL, Berkeley, California
	Low-level RF (LLRF) control hardware and its embedded programming plays a pivotal role in the performance of an accelerator. Modern designs implement most of the signal processing in the digital domain. This reduces the size and cost of the hardware, but places the burden of proper operation on the programming. FPGAs (field programmable gate arrays) and communications-grade ADCs and DACs enable sub-microsecond group delay for the LLRF controller feedback signal. Ancient concepts of the virtue of simplicity are easy to apply to the hardware, but more of a challenge in the context of programming. Digital signal processing, combined with dedicated hardware, can control and maintain cavity phase (relative to an absolute reference) unaffected by drift or 1/f noise of any long cables or active components. Developing and testing that programming is a very real challenge. This paper discusses approaches and techniques to make LLRF systems meet their goals in upcoming accelerators.
	Slides

THC2MA01	Design of The PEFP Low Beta Cryomodule	vacuum, shielding, controls, radiation	564
	S. An, Y.-S. Cho, B. H. Choi KAERI, Daejon
	A low beta elliptical superconducting RF (SRF) cavity has been designed for the linac of Proton Engineering Frontier Project (PEFP). A double stiffening-ring structure is designed to reduce cyclic Lorentz force detuning of the PEFP low beta cavity. HOM analysis has shown, for the PEFP low beta cavities, the HOM coupler’s Qext needs to be lower than 3·10⁺⁵ for reducing influence of the dangerous modes on the beam instabilities and HOM-induced power. A coaxial coupler with two stubs, one hook and the coupling tip directly installed on the inner conductor is designed for PEFP cryomodules. The cooling system including is designed for the PEFP cryomodules. A magnetic shielding structures shaped by two coaxial cylinders is designed for the PEFP low beta cryomodules. *This work is supported by the 21C Frontier R&D program in the Ministry of Science and Technology of the Korean government.
	Slides

THC2MA03	Design of L-band Superconducting Cavity for the Energy Recovery Linacs	damping, quadrupole, dipole, simulation	570
	K. Umemori, T. Furuya, S. Sakanaka, T. Suwada, T. Takahashi KEK, Ibaraki H. Sakai, K. Shinoe ISSP/SRL, Chiba M. Sawamura JAEA/ERL, Ibaraki
	The ERL project in Japan has been started with the cooperation of?KEK, JAEA, ISSP and other SR institutes. For the ERL, superconducting cavities are key components to achieve high energy, high current and low-emittance electron beams. One challenging task, required for the cavity, is a strong damping of the higher-order-modes (HOMs), since they could cause the beam-breakup instabilities and the significant heat load on the cryomodule. We are proceeding with the cavity design, which is optimized for ERLs, with concentrating our attention on HOM damping. A large diameter beam-pipe with microwave absorber is adopted as HOM damping scheme. It can extract the HOM power effectively. We have also investigated optimization of the cavity shape for further suppression of the HOMs. In this report, our cavity design and its HOM characteristics are presented.
	Slides

THZMA03	Construction of Shanghai Synchrotron Radiation Facility	storage-ring, power-supply, controls, vacuum	593
	Z. Zhao, H. Ding, H. Xu SINAP, Shanghai
	The Synchrotron Radiation Facility (SSRF), a third generation light source based on a 3.5GeV storage ring, is under construction at Zhang-Jiang Hi-Tech Park in Shanghai. The SSRF groundbreaking was made in December 2004 and the construction of the SSRF main and auxiliary buildings was completed in November 2006. The construction and installation of the SSRF accelerator components are under going with the target schedule of starting storage ring commissioning in April 2008 and the user operation in April 2009. This paper reports the construction progress of the Shanghai Synchrotron Radiation Facility.
	Slides

THZH101	Review of Hadron Machines for Cancer Therapy	proton, ion, cyclotron, synchrotron	573
	M. Kanazawa NIRS, Chiba-shi
	Charged particle therapy is now taking a long step from research stage to routine treatment. Highly reliable and sophisticated systems are required at reasonable cost. There are about two dozens of therapy accelerators working in the world. Besides the proton beams, carbon beam is being watched with keen interest because of its excellent clinical effects in cancer treatments. Accelerators which deliver heavy charged particles for cancer therapy will be reviewed.
	Slides

THC3MA05	Bunch Compression using the Transport Line and Short Bunch revolving in NewSUBARU	injection, storage-ring, radiation, electron	619
	S. Suzuki, T. Asaka JASRI/SPring-8, Hyogo-ken Y. Hisaoka, T. Matsubara, T. Mitsui, Y. Shoji NewSUBARU/SPring-8, Laboratory of Advanced Science and Technology for Industry (LASTI), Hyogo
	We have demonstrated the idea of circulating a short, intense linac bunch for some tens of turns in an isochronous ring. We compressed a bunch from the SPring-8 linac to a few picoseconds rms by means of an energy compression system and a beam transport line from the linac to NewSUBARU. The NewSUBARU storage ring was set to a quasi-isochronous condition and the bunch circulated for some tens of turns after injection while maintaining the short bunch length. And we measured the coherents synchrotron radiation at 90-140GHz by semiconducter detector. The bunch length is maintained in about 20 microseconds, but the CSR power decreases little by little.
	Slides

THPMA004	RF Amplifiers and Structures for ISAC/TRIUMF	controls, power-supply, rfq, RF-structure	631
	A. K. Mitra, Z. T. Ang, I. V. Bylinskii, K. Fong, R. E. Laxdal, J. Lu, R. L. Poirier, V. Zviagintsev TRIUMF, Vancouver
	The ISAC-I accelerator is comprised of two room temperature linacs; a 35MHz RFQ and a 106MHz separated function drift tube linac producing an accelerating voltage up to 4.5MV and 8.1MV respectively. In addition a pre-buncher, chopper and several re-bunchers are used in the accelerator chain to manipulate the longitudinal phase space. A heavy ion superconducting linac is being installed at ISAC/TRIUMF to increase the energy of ISAC-I from 1.5 MeV/u to 6.5 MeV/u for ISAC-II. A first stage, now in commissioning, consists of twenty medium beta cavities driven by twenty, 106MHz, tube amplifiers. In the second stage of ISAC-II, 20 high beta quarter wave superconducting cavities will be installed operating at 141 MHz. A transfer line connecting ISAC-I and ISAC-II has a room temperature buncher cavity at 35 MHz. This report will summarize rf amplifiers employed in ISAC facility and discuss the choice of amplifiers for the second stage of ISAC-II. Some of the re-furbishing and improvements that are done to ISA-I rf system will also be discussed.

THPMA015	Performance of 6 MW Peak, 25kW Average Power Microwave System for 10 MeV, 10 kW Electron LINAC	klystron, gun, electron, vacuum	649
	P. Shrivastava, P. Mohania, J. Mulchandani, Y. W. Wahnmode RRCAT, Indore (M. P.)
	An S-Band microawave system with peak power capability of 6MW and average power capability of 25 kW was designed, constructed and commissioned at RRCAT. The inhouse development of various microwave technologies and pulse modulator technologies was successfully achieved and the microwave system was interfaced to the 10MeV, 10kW electron LINAC. The electron LINAC could be tested to full rated energy and power using the present microwave system. The present paper highlights the details of the performance results.

THPMA023	Construction of SSRF Magnet Power Supply System	power-supply, controls, booster, storage-ring	664
	T. J. Shen, H. G. Chen, C. L. Guo, Z. M. Hu, D. M. Li, R. Li, H. Liu, S. L. Lu, X. Wang, W. F. Wu, R. N. Xu, S. M. Zhu SINAP, Shanghai
	The Shanghai Synchrotron Radiation Facility (SSRF) is a third-generation synchrotron radiation light source under construction. In SSRF, there are 520 sets of magnet power supplies for the storage ring and 163 sets for injector. All of the power supplies are in PWM switched mode with IGBT. A high precision stable output power supply for 40 dipoles rated at 840A/800V with the stability of ±2·10^-5/8hrs will be used for storage ring. 200 sets of chopper type power supply will be used for exciting main winding of quadrupoles respectively. In booster ring, two sets of dynamic power supply for dipoles and two sets for quadrupoles will run at the biased 2Hz sinusoidal wave. All above power supplies will work with digital power supply controllers designed by PSI. All power supplies are being manufactured at professional power supply companies in China.

THPMA050	Performance of Cryomodule and Cryogenic Network System for the Superconducting Linac at IUAC. Delhi	vacuum, cryogenics, ion, booster	697
	T. S. Datta, J. Antony, S. Babu, J. Chacko, A. Choudhury, S. Kar, M. Kumar, R. S. Meena, A. Roy IUAC, New Delhi
	The Superconducting Linear Accelerator as a booster of existing 15 UD Pelletron accelerator is under construction at IUAC. The heart of superconducting linac is three cryomodules, each one housing eight quarter wave niobium cavities. At present the first linac module along with superbuncher and rebuncher cryostat are integrated with zero degree beam line. Design and fabrication of two more linac modules under progress. A VME based CRYO-DACS has been developed to monitor and control parameters of cryostat. The total load at 4.2 K for complete system including locally developed liquid helium distribution line as well as break up load for each cryomodules has been measured. The measured load in linac module is higher than the design value. A detailed thermal analysis has been carried out using temperature profile for each component of cryomodules. Extra load is mainly contributed by aluminum structure,drive coupler and additional radiation load. The present paper will be highlighting the operating experience on cool down of linac as well as thermal performance of each cryo module. Scope of improvement on future linac cryo module to reduce the static load will also be covered.

THPMA061	Numerical study of field errors due to mechanical tolerances in superconducting miniundulators	simulation, undulator, microtron, synchrotron	711
	C. Diao, H. O. Moser SSLS, Singapore
	Based on a wire model, analytical formulae are derived to describe the spatial distribution of the magnetic field as determined by the parameters of the undulator including positional and orientational errors. Semi-analytical numerical simulations are performed to estimate the tolerance of the errors required for a satisfactory function of the supramini, including the effects of systematic errors (pitch, yaw and roll errors) and random errors of the wire position. The effects of these errors on the quality of the field are then graphically analyzed to show the RMS spread of the functions.

THPMA063	Energy Stabilization of 2.5 GeV Linac using DeQing	controls, feedback, klystron, power-supply	717
	S. H. Kim, Y. J. Han, J. Y. Huang, S.-C. Kim, S. H. Nam, S. S. Park PAL, Pohang, Kyungbuk
	The 2.5 GeV electron linac of Pohang Accelerator Laboratory (PAL) employs 80 MW klystrons with matching 200 MW modulators as RF sources. Beam voltage stability of the klystron is directly related to a PFN (pulse forming network) charging voltage of the modulator. Therefore, a good regulation of a PFN charging voltage is essential in the modulator. The regulation of the klystron pulse voltage amplitude is made by controlling the PFN charging voltage. In a conventional resonant charging pulse modulator, the regulation is usually achieved by using a deQing circuit. The required beam voltage regulation of less than ± 0.5 %, without deQing circuit, has been achieved by using a SCR phase controller with a voltage regulator. For further improvement of the beam voltage stability for the PAL XFEL (x-ray free electron laser) linac, PAL is studying a deQing circuit aiming at the stabilization of less than 0.02%. A new deQing circuit has been developed with a compensation function which can reduce a charge voltage fluctuation by about several times. The design concept and performance of the deQing circuit will be discussed.

THPMA064	Development of a 200keV Linear Induction Accelerator	induction, controls, acceleration, power-supply	720
	K. V. Nagesh, S. Acharya, R. Agarwal, D. P. Chakravarthy, S. Mitra, K. C. Mittal, D. D. Praveen Kumar, R. N. Rajan, S. R. Raul, P. C. Saroj, A. S. Sharma, D. K. Sharma BARC, Mumbai
	Electron Linear Induction Accelerator (LIA) are for applications for applications in High Power Microwaves (HPM), high gradient accelerators, flash X-Ray radiography (FXR), flue gas clean-up, detoxification of chemicals, cross-linking of polymers, sterilization of food and medical devices, etc. The LIA-200 being developed at APPD/BARC consists of three main phases of pulse compression and voltage amplification, viz; (i)solid-state pulse modulator uses semiconductor devices, (ii)Pulse compression and voltage amplification stages, steps up to 200kV, 5 micro-seconds and compresses these pulses to 75kV, 10kA, 50ns in five stage and (iii)three induction cavities in ADDER mode for relativistic electron beam generation, with matched impedance of 5 ohms. Metglas cores have been used in the switches, cavities and pulse transformers. Deminaralized water capacitors and water transmission lines have been used for low impedance energy storage and compactness. The complete system has been assembled and ready for commissioning. LIA system will be operated from a PLC based control system which is under testing.

THPMA067	Stability Analysis of a Klystron-Modulator for PAL XFEL	klystron, impedance, electron, free-electron-laser	729
	J.-S. Oh, C. W. Chung, S. D. Jang, S. J. Kwon, Y. G. Son, J.-H. Suh PAL, Pohang, Kyungbuk I. S. Ko, W. Namkung POSTECH, Pohang, Kyungbuk
	The PAL (Pohang Accelerator Laboratory) is persuading to construct a SASE-XFEL facility (PAL XFEL). The stable electron beam is essential for the single-pass free electron laser facility. The beam stability is governed by an accelerating RF field, of which fluctuation is mainly caused by the modulation of klystron voltage pulses. Therefore, it is directly determined by the charging stability of a modulator that uses an inverter charging system. The stable charging power supply can be realized by a stable probing and correct manipulating of a charging signal, a fine control of charging current, low noise environment, etc. This paper shows the detail analysis of the stability dependency of a klystron-modulator on the related parameters.

THPMA070	Characterisation of Amorphous Magnetic Material with Multiple Pulse Excitation	induction, impedance, power-supply	732
	A. S. Sharma, S. Acharya, K. V. Nagesh BARC, Mumbai U. Kumar, G. R. Nagabhushana IISC, Bangalore
	An experimental investigation for the understanding of magnetic core saturation behaviour under pulse excitation is presented in this paper. The effect of repetitive shots, after resetting, on the magnetic properties of toroidal amorphous core of size 160/240/25 mm is reported. This study is made using 20kV, 20, and 200ns square pulse source, to realize the various steps which an amorphous core undergoes on saturation as well as corresponding changes in magnetic parameters viz. magnetization force, total flux swing and relative permeability. The most significant effect of pulsing is seen at higher values of operating flux, compared to lower flux regimes. Effects of number of turns and input power level to the core are also shown in this paper. It has been shown that the total energy required to saturate the core in multiple pulses is less if peak input is smaller than that in case of higher peak pulse excitation. Keyword: amorphous core, multiple pulses, effect of turns, pulse excitation

THPMA074	Operational Analysis of Klystron-Modulator System for PLS 2.5-GeV Electron Linac	klystron, electron, feedback, controls	740
	S. S. Park, J. Y. Huang, S. H. Kim, S.-C. Kim PAL, Pohang, Kyungbuk
	The klystron-modulator(K&M) system of the Pohang Accelerator Laboratory (PAL) generates high power microwaves for the acceleration of 2.5 GeV electron beams. There are 12 modules of K&M system to accelerate electron beams up to 2.5 GeV nominal beam energy. One module of the K&M system consists of the 200 MW modulator and an 80 MW S-band (2856 MHZ) klystron tube. The total accumulated high-voltage run-time of the oldest unit among the 12 K&M systems has reached nearly 92,300 hours as of June 2006. The overall system availability is well over 95%. In this paper, we review overall system performance of the high-power K&M system and the operational status of the klystrons and thyratron lifetimes, and overall system's availability will be analyzed for the period of 1994 to June 2006.

THPMA076	Development of the Klystron Modulator using a High-voltage Inverter Power Supply	klystron, power-supply, controls, cathode	743
	Y. G. Son, C. W. Chung, D. E. Kim, S. J. Kwon, J.-S. Oh PAL, Pohang, Kyungbuk
	The existing klystron modulator in the Linac use a 60 Hz high voltage power supply and adopt traditional L-C resonant charging scheme with De-Qing circuit. The stability of the output high voltage is not satisfactory especially when the AC line voltage fluctuations. If an inverter power supply is used as a HV generator, it will just meet the demands A high frequency inverter switching makes the overall system size small. The command-charging feature can guarantee the high reliability of switching function. In order to increase the stability, operating reliability and comply with the PLC (programming logic controller) and touch screen control system of PLS, an upgrading works is now in progress. This paper will discuss some inverter power supply design considerations and show the test results.

THPMA087	Prototype Beam Dump For 10 kW LINAC	electron, radiation, radioactivity, beam-transport	764
	R. S. Sandha, S. C. Bapna, J. Dwivedi, V. C. Petwal, H. C. Soni RRCAT, Indore (M. P.)
	A 10 MeV, 10 kW electron LINAC has been developed at RRCAT, Indore for developing applications in the area of radiation processing of agricultural products and medical sterilization. This paper presents the functional requirements, design and manufacturing aspects of beam dump for this LINAC. Activation, conversion of electron energy into primary bremmstralung and radiation damage are important parameters for material selection of the beam dump. Other important parameters considered are mechanical strength, thermal conductivity, corrosion in ozone environment and manufacturability. Calculations of heat deposition due to electrons & photons, thermal design, hydraulic, structural and engineering design were done. FEM based analysis was performed for calculating temperature rise, deformation and stresses. The maximum temperature is estimated to be about 320 K. A prototype beam dump has been manufactured and installed and it is being tested under actual operating conditions.

THPMA091	Air Temperature Analysis and Control Improvement for the Injection Area at TLS	controls, injection, booster, synchrotron	773
	J.-C. Chang, Y.-H. Liu, Z.-D. Tsai NSRRC, Hsinchu
	This paper presents the air temperature analysis and control improvement for the injection area at the Taiwan Light Source (TLS). The injector consists of a 50-MeV LINAC and a 1.5-GeV booster synchrotron. Because of insufficient cooling capacity, the air temperature was too high ( > 27 degree C ) and the temporal temperature variation was more than 2 degree C in one day. The air relative humidity was often higher than 60%. The problem of insufficient cooling capacity became more serious after the top-up mode operation. To cope with the abovementioned thermal problem, the cooling capacity was increased and the PID parameter of the temperature control was also optimized. Totally 18 temperature sensors were distributed in this area to on-line record the air temperature history. The temperature control was improved to suppress temporal temperature variation within ± 0.1 degree C. The thermal uniformity was also much improved than ever.

THPMA100	Multipacting Study of Linac Prebuncher at CAMD	electron, focusing, power-supply, storage-ring	785
	Y. Wang LSU/CAMD, Baton Rouge, Louisiana
	Multipacting currents can absorb RF energy and produce breakdown in the prebuncher cavity of CAMD linac. This phenomenon starts when the magnetic field to focus the electron beam is applied. The multipacting has been studied in different magnetic field and RF electric field, and can be eliminated by RF processing. In the paper, the theoretical and experimental results of multipacting study will be presented; moreover, the operability of the system will be analyzed. Y. Wang et al., “Upgrades of the Linac System at CAMD”. PAC2003, Portland, May 2003, p. 2892.

THPMA104	RF activities of ACCEL Instruments in Asia-Pacific	booster, site, proton, synchrotron	791
	M. Pekeler, K. Dunkel, M. Peiniger, C. Piel, H. Vogel, P. vom Stein ACCEL, Bergisch Gladbach
	Since the foundation of ACCEL Instruments, Asia-Pacific has been an important market for RF, magnet and x-ray beam line devices. For the RF activities, pioneering work was done for JAERI, where complete superconducting rf modules where designed, built, tested and delivered. An important step for industrialisation of superconducting rf modules was done, when NSRRC decided in 2000 as the first Light Source, to contract turn key superconducting 500 MHz modules of the Cornell design to ACCEL. Similar modules have been delivered in the meantime to CLS, Cornell and DLS and three more will be delivered to SSRF in Shanghai next year. Peking University is planning to use a Rossendorf design superconducting rf module housing two 1.3 GHz TESLA cavities for the operation of their FEL project. On the normalconducting rf systems, a complete 3 GHz, 100 MeV linac has been delivered to ASP together with the 500 MHz booster cavities and the LLRF system. Booster cavities and LLRF system will be also delivered for SSRF. For SOREQ in Israel, ACCEL is developing a complete superconducting 40 MeV proton/detueron linac. The first stage of this linac is currently under delivery and installation.

THPMA114	Activities on the Nuclear Data Measurement at the Pohang Neutron Facility Based on Electron Linac	electron, target, quadrupole, background	800
	G. N. Kim Kyungpook National University, Daegu M.-H. Cho, I. S. Ko, W. Namkung POSTECH, Pohang, Kyungbuk H.-S. Kang, Y. D. Oh PAL, Pohang, Kyungbuk
	We report the present status of the Pohang Neutron Facility which consists of an electron linear accelerator, a water-cooled Ta target, and a 12-m time-of-flight path. We measured the neutron total cross-sections in the neutron energy range from 0.1 eV to few hundreds eV by using the neutron time-of-flight method. A 6LiZnS(Ag) glass scintillator was used as a neutron detector. The neutron flight path from the water-cooled Ta target to the neutron detector was 12.1 m. The background level was determined by using notch-filters of Co, In, Ta, and Cd sheets. In order to reduce the gamma rays from Bremsstrahlung and those from neutron capture, we employed a neutron-gamma separation system based on their different pulse shapes. The present measurements of Ta, Hf, Ag, and Mo samples are in general agreement with the evaluated data in ENDF/B-VI. The resonance parameters were extracted from the transmission data from the SAMMY fitting and compared with the previous ones.

THPMA127	Development of L-band Electron Accelerator for Irradiation Source	electron, klystron, bunching, beam-loading	821
	S. H. Kim, M.-H. Cho, S.-I. Moon, W. Namkung, B. Park, H. R. Yang POSTECH, Pohang, Kyungbuk S. D. Jang, J.-S. Oh, S. J. Park, Y. G. Son PAL, Pohang, Kyungbuk
	An intense L-band electron accelerator is under development for irradiation applications. It is capable of producing 10-MeV electron beams of 30 kW with the fully beam-loaded condition. The accelerator is powered by a pulsed klystron of 1.3 GHz and 25 MW with the 60-kW average power. The accelerating column, a traveling-wave structure, is operated with the 2π/3 mode and is installed vertically with other beam-line components. With the beam dynamics simulation, the beam transmission efficiency is over 90% and the beam size is enough to clear the apertures. Design details and the status of installation are presented for the L-band electron accelerator.

THPMA131	Indian Participation in LHC, SPL and CTF-3 Projects at CERN, Switzerland	dipole, vacuum, collider, klystron	829
	V. C. Sahni, V. B. Bhanage, J. Dwivedi, A. K. Jain, P. Khare, S. Kotaiah, A. Kumar, P. K. Kush, S. S. Prabhu, A. Puntambekar, A. Rawat, A. Sharma, R. S. Shridhar, P. Shrivastava, G. Singh RRCAT, Indore (M. P.) R. K. Sadhu BARC, Mumbai
	After signing a Protocol on 29 March 1996 to the 1991 cooperation agreement with CERN, Switzerland, India is participating in the construction of CERN’s most challenging and ambitious particle accelerator the “Large Hadron Collider” (LHC). The contributions span from hardware, software, and skilled manpower support for evaluation of some of the LHC sub-systems and presently to the support in commissioning of various subsystems of LHC. With major achievements on Indian part during the course of time CERN has now invited India to jointly participate further to build CERN’s Advanced Accelerator Projects like Super conducting Proton LINAC, SPL and Compact Linear Collider Test Facility, CTF-3. The present paper describes the achievements to date and high lights the ongoing and future collaboration activities.

FRYMA02	Towards a Multi TeV Linear Collider; Drive Beam Generation with CTF3	collider, linear-collider, acceleration, emittance	847
	H.-H. Braun CERN, Geneva
	The 3 TeV compact linear collider, CLIC, foresees an RF source based on a high current drive beam running parallel with the main linac. To generate this drive beam of very high instantaneous power a sophisticated complex consisting of a fully beam-loaded linac and several stages of beam compression is used. Although this scheme is very promising in terms of cost and power efficiency, it needs demonstration in a scaled version before construction of CLIC can be envisaged. This is the aim of the CLIC Test Facility CTF3, build by an international collaboration. CTF3 is constructed and exploited in several phases. Here we report present status, experimental achievements and future plans for CTF3.
	Slides

FRAMA01	The Accelerator Activities of the EUROTRANS Programme	target, proton, controls, rfq	852
	P. Pierini INFN/LASA, Segrate (MI)
	The objective of the EC Integrated Project EUROTRANS is the design and feasibility assessment of an industrial accelerator driven system prototype dedicated to the transmutation of high level waste from nuclear power plants. A part of the program is dedicated to the further development of the high power proton accelerator needed for both the short term experimental demonstrator systems and the long term large scale industrial realizations. In particular the accelerator program addresses the issues of the qualification of the beam reliability with respect to the spallation target requirements, the development of the beam transport line to the subcritical reactor, and the demonstration of the key prototypical components of the proposed linear accelerator. This communication will present an overview and status of the accelerator activities carried out by the partners of the EUROTRANS project. * On behalf of the Working Package 1.3 (Accelerator) of the EUROTRANS program
	Slides