APAC 2007 - List of Keywords (extraction)

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

extraction

Paper	Title	Other Keywords	Page
TUPMA097	Characteristics of the Magnetic Channel in the Yoke Hole of K-500 Superconducting Cyclotron	cyclotron, ion, beam-transport, simulation	241
	J. Pradhan, R. K. Bhandari, S. Bhattacharya, U. Bhunia, J. Debnath, M. K. Dey, A. Dutta, C. Mallik, Z. A. Naser, S. Paul DAE/VECC, Calcutta
	The detail magnetic field measurement of K-500 superconducting cyclotron has been carried out. The last magnetic channel of the extraction system placed in the yoke hole of the cyclotron before external beam line is active, unlike others, which are all passive. This channel comprises a coil and a special shaped iron to produce both quadrupole and dipole field for focussing and radially aligning the different ion species coming out from the cyclotron, with the external beam transport line. The magnetic field inside the channel along with the outside stray field has been measured for different channel currents as well as main magnet excitations. A 3-D model of the full magnet is constructed using magneto- static code RADIA [2] to simulate the yoke field. This paper reports the comparative study of measured and calculated field and studies the trajectories for the representative ions through the stray field calculated from the model. The later being used to locate the starting point (or matching point) for the external beam transport line

TUPMA102	Installation and Radiation Maintanance Scenario for J-PARC 50 GeV Synchrotron	vacuum, septum, beam-losses, synchrotron	247
	M. Yoshioka, T. Fujino, Y. Hori, K. Ishii, H. Kobayashi, T. Kubo, H. Matsumoto, H. Oki, T. Oogoe, Y. Saito, Y. Sato, M. Shimamoto, M. J. Shirakata, Y. Takeuchi, M. Uota, Y. Watanabe KEK, Ibaraki M. HOSOKAWA THK CO., LTD, Hitachinaka Y. Kuniyasu MELCO SC, Tsukuba
	Installation and assembling of accelerator components for J-PARC 50 GeV Synchrotron are now underway. Off-beam commissioning will be carried out between December 2007 and April 2008, and the full commissioning of J-PARC accelerator complex, which is consisted of an injector linac, a 3 GeV rapid cycling synchrotron and the 50 GeV Synchrotron, will be started from May 2008. This paper describes the status, schedule and method of installation and assembling of accelerator components. Radiation maintenance scenario will be also described.

TUPMA111	Present Status of J-PARC MR Synchrotron	septum, synchrotron, injection, power-supply	259
	T. Koseki, H. Kobayashi, H. Matsumoto, M. Yoshioka KEK, Ibaraki
	The Japan Proton Accelerator Research Complex (J-PARC) is a joint project of High Energy Accelerator Research Organization (KEK) and Japan Atomic Energy Agency (JAEA). The J-PARC accelerator complex is composed of a 400 MeV proton linac, a 3 GeV Rapid-Cycling Synchrotron (RCS), and a 50 GeV Proton Synchrotron (MR). Installation of the MR which has two extraction sections, fast extraction for the Neutrino Facility and slow extraction for the Hadron Facility, is now underway. Test of injection and extraction components such as septum magnets and kicker magnets is progressed as well. Beam commissioning scenario is now being prepared. Maintenance scenario of activated components is also crucial in a high power proton accelerator. Beam commissioning will start in May 2008.

TUPMA113	Design of High Current RF Ion Source for Micromachining Applications	ion, plasma, ion-source, electron	262
	P. Y. Nabhiraj, R. K. Bhandari, C. Mallik, R. Menon DAE/VECC, Calcutta G. G, S. Mohan IISC, Bangalore
	Liquid Metal Ion Source (LMIS) and Gas Field Emission Ion Source (GFEIS) are the major ones in micromachining applications so far. They have limitations of contaminations and low throughput respectively. Plasma based ion sources can produce heavier ions for higher throughput, lighter ions for fabrication of higher resolution structures, ions for doping, ion assisted direct writing of metallic, oxide, nitride and carbide layers and lines. Considering wide range of applications, a 13.56 MHz inductive coupled plasma (ICP) ion source for producing high brightness ion beams with very low energy spread has been developed. It is a very compact ion source with external helical antenna wound around a 30 mm quartz tube. 1 mA of Argon and 0.5 mA of proton ion beams have been extracted from 2 mm dia aperture in plasma electrode at 3.5 kV extraction potential and ~200W of RF power. Using LabView software and field point modules, an automated plasma diagnostic system has been designed and used to measure the plasma parameters. This paper describes the features of the ion source, ion beams produced, some results of the plasma diagnostics.

WEZH102	Beam Instrumentation Experience at ATF	laser, emittance, radiation, electron	305
	Y. Honda KEK, Ibaraki
	Accelerator Test Facility (ATF) at KEK is a test accelerator for linear collider development. It produces a stable low emittance beam that satisfies the requirements in the ILC. Various beam instrumentations (cavity BPM, laser wire, fast feedback, XSR, ODR etc.) have been tested. This presentation will review our recent experiences.
	Slides

WEZMA04	Superconducting Cyclotron Project at VECC	cyclotron, injection, cryogenics, controls	320
	R. K. Bhandari DAE/VECC, Calcutta
	Construction of the K-500 superconducting cyclotron at Kolkata is now in final stages. The main magnet was operated satisfactorily for alomost one year during 2005. The coil was continuously kept cooled at 4.2K temperature during the entire period. Extensive magnetic field measuremens were done for correction of the imperfections, centering of the main coil, calculation of operational settings, calculation of extraction trajectory etc. Subsequently in April 2006 the coil has been warmed up to facilitate assembly of the other systems of the machine. All major systems have been fabricated and the assembly is currently going on. We plan to start the commissioning tests in the first half of year 2007. In this paper our experience with the operation of the main superconducting magnet and magnetic field measurements will be discussed. Developmental highlights of various systems will be briefly presented.
	Slides

WEC3H102	Fabrication and Performance Test of the Cavity BPM for KEK ATF2 and PAL XFEL	coupling, pick-up, resonance, linear-collider	336
	J. Y. Huang, W. H. Hwang, S. H. Kim, S. J. Park, Y. J. Park PAL, Pohang, Kyungbuk Y. Honda, I. Y. Inoue, T. Tauchi, J. Urakawa KEK, Ibaraki M. C. Ross Fermilab, Batavia, Illinois
	Precise, single shot measurement of the beam position with a sub-micrometer resolution is required for the next generation linear accelerators such as International Linear Collider (ILC) and X-ray Free Electron Laser (XFEL). As a pill-box cavity structure is sensitive to the transverse offset of the beam at the dipole-mode resonance, e.g., TM110-mode, a pill-box type cavity is a good candidate for the sub-micrometer beam position monitor (BPM). Test cavity BPM had been designed and tested in KEK successfully, and miscellaneous improvements for the final prototype fabrication and beam tests are performed in collaboration between KEK, SLAC and PAL. With the successful results of beam test in ATF, 41 cavity BPMs will be produced by PAL and installed in ATF2, which is an advanced beam-test line under construction as the extension of existing ATF for the beam studies on the final focus of the planned ILC program. Technical design considerations, fabrication and test results are described in this paper.
	Slides

WEPMA005	Magnetic Field Calculations of a 10 MeV High Current Compact Cyclotron	cyclotron, betatron, injection, focusing	342
	V. S. Pandit, A. Goswami, P. R. Sarma, P. Sing Babu DAE/VECC, Calcutta
	A 10MeV, 5-10mA 4-sector compact proton cyclotron, is being developed at VECC. A 2.45 GHz microwave ion source will produce ~30mA of proton beam at 100keV. It will be bunched and injected axially in the central region of the cyclotron where a spiral inflector will place the beam on the proper orbit. Two delta type resonators located in the opposite valleys will be used for providing acceleration to the beam. Beam will be extracted using an electrostatic deflector. The main aim of this project is to study and settle various physics and technological problems associated with the handling of high intensity beams. In this paper we present the results of design studies of the main magnet. The conceptual dimensions of the magnet and the properties of equilibrium orbits were first obtained using hard edge approximations and matrix method. The primary size of the magnet was estimated using 2D POISSON code. Finally a 3D code was utilized for the field calculation and optimization. The profile of magnet sectors was optimized to get the desired values of isochronous field and the betatron tunes.

WEPMA015	Characteristics of Beam Extraction System of K500 Superconducting Cyclotron	cyclotron, ion, beam-transport, emittance	357
	S. Paul, R. K. Bhandari, J. Debnath, M. K. Dey, A. Dutta, C. Mallik, J. Pradhan DAE/VECC, Calcutta
	Extensive Magnetic Field measurement of the K500 Superconducting Cyclotron has been completed. In this paper we report the beam dynamical calculations along the extraction system based on the measured magnetic field data. The beam matching to the external beam transport system, for different ion species spanning the operating region is also explored.

WEPMA037	Beam Coupling Impedance Studies of the CSNS Ring	impedance, kicker, coupling, space-charge	372
	N. Wang, Q. Qin IHEP Beijing, Beijing
	The China Spallation Neutron Source (CSNS) is a high intensity proton accelerator with an injection energy of 80 MeV. The knowledge of impedance in the vacuum chamber is necessary for optimizing the accelerator performance. In this paper, the longitudinal and transverse coupling impedances of the CSNS Rapid Cycling Synchrotron (RCS) are estimated.

WEPMA078	HTS-ECRIS and Low Energy Beam Transport System of the High Current Injector	ion, ion-source, electron, linac	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.

WEPMA104	Drive System Instrumentation For VEC SCC Axial-Hole Magnetic Field Measurement	controls, cyclotron, instrumentation	467
	T. Bhattacharyya, R. K. Bhandari, T. D. Das, C. Mallik, C. N. Nandi, G. P. Pal DAE/VECC, Calcutta
	Charged particle from the ECR ion source is injected axially into the VEC superconducting cyclotron. The ion beam passes through the vertical section of the axial injection system and the axial hole at the centre of the superconducting cyclotron before reaching the spiral inflector. An accurate knowledge of the magnetic field in the axial hole is essential to properly inject and accelerate the ion beam in the superconducting cyclotron. Three channel F. W. Bell tesla meter with both axial and transverse probes were used to measure the magnetic field. A probe drive with high resolution and repeatability was developed to map the field along this hole from median plane upto 3m above. Stepper motor drives three lead screws which move the hall probe assembly and position them correctly at regular intervals. The basic hardware includes a stepper motor, its drive control unit, PC with National Instrument PCI-6052E data acquisition card and RS232 interface for tesla meter. The GUI developed using Labview takes care of the stepper motor drive control, measurement of the field and statistical error analysis. This paper describes the set up and control system of this measurement.

THYMA01	Kickers for Injection and Extraction in Damping, Combiner and Storage Rings	kicker, injection, impedance, damping	539
	F. Marcellini INFN/LNF, Frascati (Roma)
	Injection and extraction kickers play a fundamental role in all the projects of new major accelerators at present under study. The feasibility of these accelerators depends also on the possibility to realize kickers based on unconventional design and new technologies. This paper describes the R&D carried out at LNF on two different types of deflecting devices. The first are the kickers for the Damping Ring (DR) of the International Linear Collider (ILC) and the Storage Rings (SR) of colliders like DAFNE. They require very low impedance, good field uniformity in a wide region around the beam axis and very short pulse duration for limiting the length and consequently the cost of the DR and for reducing the perturbation of the stored bunches in SRs. The tests made on stripline prototypes, fast high voltage pulsers and vacuum feedthroughs are presented. The second are the RF kickers for the CLIC Test Facility 3 (CTF3) for which an original SW structure has been designed and realized for the Delay Loop (DL) while a more conventional TW deflector allows the multiplication of bunch current and frequency in the Combiner Ring (CR). Results of their performances are described.
	Slides

THC3H101	Status of the Industrial RF-accelerators in BINP	electron, vacuum, coupling, shielding	622
	V. Auslender, A. A. Bryazgin, V. G. Cheskidov, B. L. Faktorovich, V. Gorbunov, I. V. Gornakov, V. E. Nekhaev, A. D. Panfilov, A. I. Sidorov, V. O. Tkachenko, A. F.A. Tuvik, L. A. Voronin BINP SB RAS, Novosibirsk
	ILU type of industrial RF accelerators developed and producing in BINP involve the energy range from 0.5 to 5 MeV with power up to 50 kWt. Compact size of this type of the accelerators and no necessity of SF6 allows to use their in the wide spectrum of technology, including the food and drug treatment. Described the status of the novel ILU-12 accelerator with energy up to 5 MeV and power up to 300 kWt. BINP developed series of X-ray converters based on tantalum and wolfram targets. The family of ILU accelerators includes the ion accelerator ILU-9. This report involves the new radiation technologies which use ILU type of accelerators, based on e-beam, X-ray and ion beams.
	Slides

THPMA008	Field Measurement Results of the Quadrupole Magnets for ATF2	quadrupole, sextupole, power-supply, coupling	637
	M. Masuzawa, Y. Suetsugu, R. Sugahara KEK, Ibaraki
	ATF2 will be built at KEK as a test facility for the final focus system for the ILC. The specifications for the final focus system require transverse focusing of the electron beam to be nearly 40 nm. The quadrupole magnets for the ATF2 beam line have been designed and manufactured. The diameter of the magnet bore is 32 mm and the length is 180 mm. The magnets have to meet strict specifications for the multipole components, especially the sextupole components, in order to achieve the required small beam size. Precision measurement is required not only for the multipole components but also for the magnetic center and median plane. Field measurement results of these small bore magnets will be reported.

THPMA016	Median Plane Magnetic Field Mapping for Superconducting Cyclotron (SCC) in VECC	controls, cyclotron, monitoring, shielding	652
	A. Roy, T. Bhattacharjee, R. B. Bhole, U. Bhunia, Chaddha, N. Chaddha, J. Debnath, M. K. Dey, A. Dutta, C. Mallik, C. N. Nandi, Z. A. Naser, G. P. Pal, S. Pal, S. Paul, J. Pradhan DAE/VECC, Calcutta
	The magnetic field upto 29 inch radius on median plane of SCC Magnet (Peak field 5.8T) is measured over its operating range. A client-server system is developed to minimise mapping time and human intervention. The magnetic field is mapped at radial interval of 0.1 inch and angular interval of 1 degree. The complete map of 360 degree comprised of about 100K field points is obtained in less than 100 minutes. The field mapping system is designed to work as PC based TCP Client-Server to reduce the design complexity, system overload and debugging effort. The Server program is developed as windows console in ‘C’ and the Client is developed using LabView to provide a user friendly operation console along with online preliminary display and analysis of field data. This architecture provides a reliable and easily modifiable control s/w. The correctness of the magnet assembly is calculated from the acquired data, which in-turn represents the correctness of measurement system. A detailed study of the magnet characteristic is done. The first harmonics of the fields at different radii are obtained at all magnet excitation and corrected by coil-centering and shims placement.

THPMA078	Wideband Current Transformers for the Surveillance of the Beam Extraction Kicker System of the Large Hadron Collider	kicker, collider, beam-losses, shielding	746
	C. Defrance, J. F. Bergoz BERGOZ Instrumentation, Saint Genis Pouilly L. Ducimetière, E. Vossenberg CERN, Geneva
	The LHC beam dumping system must protect the LHC machine from damage by reliably and safely extracting and absorbing the circulating beams when requested. Two sets of 15 extraction kicker magnets form the main active part of this system. A separate high voltage pulse generator powers each magnet. Because many failures are deemed catastrophic, the magnets and generators are continuously surveyed in order to generate a failsafe beam abort as soon as an internal fault is detected. Amongst these surveillance systems, wideband current transformers have been designed to detect any erratic starts in one of the generators. The current transformers were developed in collaboration with industry. To minimize losses, high-resistivity cobalt alloy was chosen for the cores. The annealing techniques originally developed for LEP beam current measurement in collaboration between CERN and industry allowed to extend the frequency response beyond that of traditional core materials. The paper shows the results obtained, exposes the problems encountered with shielding, conductor position sensitivity, load resistor technology and their solutions.

THPMA089	Studies of Metallic Ion Beams using ECRIS	ion, plasma, ion-source, background	770
	P. Kumar, D. Kanjilal, P. S. Lakshmy, G. Rodrigues IUAC, New Delhi
	Low energy metallic ion beams find wide applications in various research fields especially in materials science, atomic and molecular physics. Several metallic ion beams have been developed successfully using all permanent magnet 10 GHz electron cyclotron resonance (ECR) ion source based low energy ion beam facility (LEIBF) [] at IUAC. The most important feature of the facility is that the source and all its peripheral components including electronics and vacuum systems are on a high voltage platform (300 kV).The metallic ion beams were developed by different methods e.g. oven, sputtering, insertion and metal ions using volatile compounds (MIVOC). The ion source has been tuned to get optimum intensities of metallic ion beams. The high intensities of low charge state metallic ion beams are suitable to engineer the materials for optical, electrical and structural properties via ion implantation. For the interest of atomic and molecular physics, the high intensities of highly charged metallic ion beams are produced using gas mixing [] and bias techniques. The charge state distribution studies of various metallic ion beams and gas mixing effect of different gases are presented. [] P. Kumar et.al., Nucl. Instr. and Meth. B, 440 (2006) 246.[] A. G. Drentje et.al., Rev. Sci. Instrum. 953 (1996) 67.

THPMA115	Present Status of the FFAG Accelerator Complex in KURRI for ADS Study	booster, acceleration, proton, ion	803
	M. Tanigaki, M. Inoue, K. Mishima, Y. Mori, S. Shiroya KURRI, Osaka S. Fukumoto, Y. Ishi Mitsubishi Electric Corp, Energy & Public Infrastructure Systems Center, Kobe S. Machida STFC/RAL/ASTeC, Chilton, Didcot, Oxon
	KART (Kumatori Accelerator driven Reactor Test) project has started at Kyoto University Research Reactor Institute (KURRI) from the fiscal year of 2002. The purpose of this project is to demonstrate the basic feasibility of ADS, studying the effect of incident neutron energy on the effective multiplication factor of the subcritical nuclear fuel system. The proton FFAG accelerator complex as a neutron production driver for this project is now in the final stage of the test operation. The first ADS experiment will be held in this autumn by combining this FFAG complex with our Kyoto University Critical Assembly (KUCA) in KURRI. The developments and the current status of this FFAG accelerator complex, including the current status of this project, will be presented.

THPMA118	Electron Accelerator of ELV-type and their Worldwide Application	electron, controls, vacuum, radiation	809
	N. K. Kuksanov, S. Fadeev, P. I. Nemytov, R. A. Salimov, M. E. veis BINP SB RAS, Novosibirsk
	D. C.ELV accelerators are the most popular Russian accelerators for industrial and research purposes. More than 100 accelerators were deliverd from Germany at west to Japan and Malaya at east. By now the total operation time exceeds 1000 accelerato-years. The design and schematic solutions provide the long term and round-the -clock operation. The specific features of the ELV-accelerators are the simplicity of design, convenience and ease in control and reliability in operation. ELV-type acceleratodrs is covering the energy range from 0.2 to 2.5 MeV with a beam current of up to 500 mA and maximum power of up to 400 kW. The accumulated experience in the design, development, and manufacturing of the ELV-series accelerators enables us to propose the machines which by their parameters do not rank below but in the majority of cases even surpassing the best world samples of such machines. In the work presented here the parameters of ELV electron accelerators are given and the main systems of the accelerator and a wide set of supplementary devices extending the application range of the accelerator is given. The main industrial applications of ELV accelerators are considered also.

THPMA126	Beam Optics Design for DC High-voltage Accelerator of MW Level	cathode, gun, electron, optics	818
	H. B. WANG, X. Jin, M. Li, X. S. Liu, Z. Xu CAEP/IAE, Mianyang, Sichuan
	Here, we report on the working group ''beam optics design'' of MW levels dc high-voltage accelerator, that will be used in radiation technologies in large-scale industrial production (flue gas treatment, metallurgy; waste water treatment, etc.). This workshop also had working groups on ''Electron Guns Designs and Beam control device'', ''MW level high-voltage power supply designs and fabrication'', and ''Beam scanning and extraction devices designs and fabrication''. Comparing with existent high-voltage accelerators, our facility have higher average power of >500mA dc, which resulting in some technological challenges on beam production, power supply, and beam extraction. Here, we are concerned with several proposals that other laboratories have been working on. Subjects of concern are optics, accelerator design and modeling, stability requirements that connects the conventional DC high-voltage accelerators for round-the-clock operation. We describe the design, the projected performance and the status of our facility. *WANG Han-bin, XU Zhou, JIN Xiao, LI Ming, LIU Xi-san**

FRXMA03	Achievement of ATF and its Future Plans	damping, emittance, kicker, coupling	837
	J. Urakawa KEK, Ibaraki
	The ATF (Accelerator Test Facility at KEK) International collaboration has been launched formally under the MoU (Memorandum of Understanding) from August 1, 2005, so as to maximally contribute to the world design and development efforts in the areas of particle sources, damping rings, beam focusing and beam instrumentation towards the International Linear Collider (ILC) project. I will give a talk on the recent achievement at ATF and its future plans, especially ATF2 project.