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klystron

   
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MOXMA01 Present Status of J-PARC linac, synchrotron, 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.  
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TUPMA035 SCSS Prototype Accelerator Timing System electron, controls, acceleration, gun 154
 
  • N. Hosoda, T. Ohata, T. Ohshima
    JASRI/SPring-8, Hyogo-ken
  • H. Maesaka, Y. Otake
    RIKEN Spring-8 Harima, Hyogo
  SPring-8 Compact SASE-FEL Source (SCSS) project is in progress. To verify its feasibility, the 250MeV SCSS prototype accelerator (SPA) was constructed and beam commissioning started in October 2005. We observed first lazing of 49nm wave length in June 2006. In this paper, we describe the timing system of SPA. The target time jitter was selected under 1ps. To achieve this, A master trigger generator unit (MTU), a master trigger distribution unit, a 5712MHz synchronous trigger delay unit (TDU) and a level converter unit were newly developed. The MTU generates a 1-120Hz master trigger to drive all accelerator components synchronously from 60Hz AC line and 238MHz RF. The TDU is an 8ch 24bit delay counter to generate required timing signals for each component using the master trigger from the MTU. The TDU uses 238MHz RF as a counter clock and uses 5712MHz RF to recover the circuit jitter and to synchronize to the electron beam. The time jitter of 0.71ps in the TDU was achieved. We measured the time jitter between an electron beam and a 5712MHz RF that is a main acceleration RF frequency, and obtained 0.34ps. This demonstrates good stability of SPA.  
 
TUPMA037 Project of Infrared Storage Ring Free Electron Lasers at AIST electron, undulator, storage-ring, free-electron-laser 160
 
  • N. Sei, H. Ogawa, K. Y. Yamada, M. Y. Yasumoto
    AIST, Tsukuba, Ibaraki
  Development of free electron lasers (FELs) with a compact storage ring NIJI-IV in the near and middle infrared regions is planned in National Institute of Advanced Industrial Science and Technology (AIST). Infrared FELs with a linear accelerator have already been developed and used for various applications in many FEL facilities. However, there is no storage ring FEL (SRFEL) which can oscillate in those regions widely. Although an SRFEL is inferior to a linear accelerator FEL in the average power, it has an extremely stable wavelength and its line width is as narrow as that of a monochromatic light in a synchrotron radiation facility. The average power of the synchrotron radiation in an infrared beam line is about 10 micro-watt at most. Then the SRFEL can be expected as a light source which is more intense than the synchrotron radiation. The output power which is our target is 1 mill-watt. We are aiming at SRFEL oscillations in a wavelength region from 1 to 10 micron which include the fingerprint region partly.

sei.n@aist.go.jp

 
 
TUPMA066 Energy Equalization by using S-band and X-band Accelerator Modules linac, simulation, positron, 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.  
 
TUPMA088 High Power RF Testing of a Cell Coupled Drift Tube LINAC Prototype for LINAC4 coupling, linac, 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.  
 
WEXMA01 Status of KEKB and Upgrade Plan to SuperKEKB luminosity, electron, positron, linac 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.  
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WEPMA071 The Design, Fabrication and Performance Testing of the Analog I/Q RF Control System at NSRRC controls, feedback, booster, linac 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, linac, power-supply, electron 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.  
 
WEPMA080 Control System for the Bending MPS at PLS Linac controls, power-supply, linac, monitoring 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.

 
 
WEPMA105 High Power Test of C-band Accelerating System for Japanese XFEL Project linac, 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.  
 
WEPMA119 Control Characteristics of the PEFP RF System controls, proton, power-supply, site 485
 
  • H.-J. Kwon, Y.-S. Cho, I.-S. Hong, H. S. Kim, K. T. Seol, Y.-G. Song
    KAERI, Daejon
  A 20 MeV proton accelerator has been developed and tested at Proton Engineering Frontier Project (PEFP) as a front-end part of the 100 MeV accelerator. The initial test results showed that more stable rf operation was necessary to investigate the machine characteristics more deeply. A LLRF control system using commercially available digital board was newly developed and tested for this purpose. The goals of the rf control for 20 MeV accelerator are to achieve errors within 1 % in amplitude and 1 degree in phase against external perturbations such as the change of resonant frequency, fluctuation of klystron power supply voltage and also beam loading. In addition, the PEFP 20 MeV DTL has unique characteristics that single klystron drives four tanks simultaneously. In this paper, the initial test results of the rf system with digital controller are presented and its control characteristics are discussed.  
 
WEPMA137 Design and Simulation of Multibeam Klystron Cavity simulation, coupling, linac, 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 electron, vacuum, cathode, linac 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.  
 
WEPMA140 Development of C-band Multi Beam Sub-booster Klystron electron, simulation, gun, cathode 514
 
  • M. Yoshida, S. Fukuda
    KEK, Ibaraki
  • V. E. Teryaev
    BINP SB RAS, Novosibirsk
  A C-band small multi beam klystron (MBK) has been under development. It is designed for the sub-booster klystron which is required to drive multiple 50 MW C-band klystrons for the SuperKEKB injector upgrade plan. The designed output power is over 100 kW in case of the applied voltage of 25 kV which is suitable for the existing pulse modulator for the S-band sub-booster klystron. At this operating condition, the designed micro-perveances of the total and the each beamlet are 2.0 and 0.25 respectively. The design overview will be presented.  
 
WEPMA142 Commissioning and Operational Experience with INDUS-2 RF Systems injection, controls, power-supply, vacuum 517
 
  • M. Lad, M. K. Badapanda, A. Bohrey, P. R. Hannurkar, A. Jain, M. K. Jain, N. Kumar, M. Prasad, V. Rajput, D. Sharma, N. Tiwari, R. K. Tyagi, R. K.DEO. deo
    RRCAT, Indore (M. P.)
  2.5 GeV, 300mA Synchrotron Radiation Source Indus-2 is under commissioning phase at RRCAT, Indore. The beam injection in Indus 2 from Booster Synchrotron started in July 2005,since then RF system is in operation. RF system compensates the SR losses experienced by the circulating electrons in the bending magnets and insertion devices. In addition to compensate Synchrotron losses, RF system will have to supply power for boosting energy from 600 MeV to 2.5 GeV. Indus-2 RF system employs four numbers of ELETTRA make elliptical cavities to generate 1500 kV accelerating RF voltage at 505.812 MHz. Each RF cavity is powered by 64 kW RF amplifier. With around 650 KeV of SR losses the system is designed to provide cavity gap voltage such that sufficiently high quantum and Touschek lifetime is achieved. Initially conditioning of all four RF cavities was performed. Then system was handed over for operation and with beam trials optimization of different parameters of RF system is being done. The paper describes test results of Indus-2 RF system & commissioning and operational experience of Indus-2 RF system.  
 
THYMA05 Low-level RF Control System Design and Architecture feedback, controls, simulation, linac 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.  
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THPMA005 SCSS RF Control Toward 5712 MHz Phase Accuracy of One Degree controls, electron, laser, acceleration 634
 
  • Y. Otake, M. Kitamura, H. Maesaka, T. Shintake
    RIKEN Spring-8 Harima, Hyogo
  • T. Fukui, N. Hosoda, T. Ohata, T. Ohshima
    JASRI/SPring-8, Hyogo-ken
  To check the feasibility of X-FEL(SCSS), the 250 MeV prototype accelerator was constructed at SPring-8. The low level RF control system with a 5712 MHz pulsed RF signal was built to achieve very-tight requirements that were phase stability and resolution of less than 1 deg.. These requirements correspond to a beam energy variation of 10-4 at the crest acceleration and time stability and resolution of less than 500 fs. To realize the requirements, IQ modulators/detectors, arbitrary wave form generators/detectors of VME modules to handle an IQ function were developed. The PID control and the adaptive control method, which the modules can manipulate, were employed to obtain the requirements. We finally achieved the phase setting and detecting resolution of the IQ detectors/modulators of ± 0.5 deg.. Decreasing the phase drift was achieved by the PID control program, and reducing the phase variation within a pulse width of 2 us was achieved by the adaptive control function on the VME modules. The unnecessary time jitters of the pulse were also automatically detected by the module function. In this paper, we describe a summary of the system and its phase control performance.  
 
THPMA015 Performance of 6 MW Peak, 25kW Average Power Microwave System for 10 MeV, 10 kW Electron LINAC linac, 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.  
 
THPMA063 Energy Stabilization of 2.5 GeV Linac using DeQing linac, controls, feedback, 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.  
 
THPMA067 Stability Analysis of a Klystron-Modulator for PAL XFEL impedance, electron, linac, 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.  
 
THPMA074 Operational Analysis of Klystron-Modulator System for PLS 2.5-GeV Electron Linac linac, 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 power-supply, controls, cathode, linac 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.  
 
THPMA127 Development of L-band Electron Accelerator for Irradiation Source electron, linac, 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, linac, vacuum, collider 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.