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booster

  
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TUYMA02 Commissioning of the Indus-2 Storage Ring synchrotron, vacuum, storage-ring, synchrotron-radiation 61
 
  • V. C. Sahni
    RRCAT, Indore (M. P.)
  An overview of the 2.5 GeV synchrotron radiation source, Indus-2, which has been set up at RRCAT, Indore will be presented with emphasis on commissioning details. The accelerator is used both as a booster and as a storage ring. Using an injection energy of 550MeV, the beam energy has been ramped up to 2.4 GeV. Two beam lines have also been installed, one for x-ray diffraction (XRD) and another for extended x-ray absorption fine structure (EXAFS) studies. To condition the vacuum chamber of the ring, regular operation has been restricted to 2 GeV. To test the XRD beam line, first diffraction pattern from a pyrolitic graphite sample was recorded with bending magnet synchrotron light with ring operating at 2 GeV. Indigenous technological base created in setting up Indus-2 would be used while participating in up coming international accelerator projects.  
slides icon Slides
 
TUPMA018 Compact Hard X-Ray Synchrotron Radiation Source with Superconducting Bending Magnets storage-ring, synchrotron, synchrotron-radiation, radiation 127
 
  • G. Kulipanov, E. Antokhin, A. Gvozdev, P. V. Logachev, N. A. Mezentsev, V. E. Panchenko, A. V. Philipchenko, Y. V. Rakshun, A. V. Utkin, N. Vinokurov, K. Zolotarev
    BINP SB RAS, Novosibirsk
  Synchrotron radiation (SR) with relatively hard spectrum (up to 50 keV) is necessary for realization many modern X-ray analytical methods. These methods can be effectively used in industrial and medical applications, in universities and scientific centers. So, the task of developing of compact source of hard synchrotron radiation is very perspective. Budker INP has a big experience for developing and fabrication of high field superconducting insertion devices for different SR centers. In frame of this activity a superconducting bending magnet with field up to 9.6 T was fabricated for BESSY-II and commissioned in 2004. This magnet also became a prototype for compact hard SR source. A project of such storage ring is under developing in Budker INP now. This design fixed beam energy to 1.2 GeV, ring circumference about 52 m. Estimated horizontal equilibrium emittance will better than 20 nm. This report includes a detailed description of main parameters and magnetic structure of designed storage ring as well as preliminary design of injector system and beamline layout.  
 
TUPMA022 Construction Progress of the SSRF Injector linac, 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, linac 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.  
 
TUPMA032 Radiation Safety System for INDUS Accelerator Complex radiation, controls, monitoring, microtron 148
 
  • R. G. Marathe, V. Bhatnagar, P. Fatnani, R. K. Gupta, G. Singh, D. S. Thakur, thakkar,k.k. thakkar
    RRCAT, Indore (M. P.)
  Indus Accelerator Complex consists of a 450 MeV electron storage ring Indus'1 and 550-2500 MeV booster-cum-storage ring Indus-2, which is under commissioning. A common injector system that feeds these rings consists of a 20 MeV microtron & a 450-600 MeV booster synchrotron. Hazardous ionizing radiation is emitted from the accelerators of a facility like Indus. Therefore, it is mandatory to install a Radiation Safety System (RSS) at such a facility. The essential constituents of such a RSS are:·Shielding structure for protecting the personnel from ionising radiation;·Detection and monitoring of the radiation levels inside & outside the shielded area;·Protection system for ensuring that nobody is inside the shielded area when the facility is in operation. The radiation safety system was set-up in stages. The RSS for microtron and booster synchrotron was set-up first followed by that for Indus-1 ring. For Indus-2, it was commissioned in July 2005. These systems were then integrated and have been performing as intended. This paper presents the integrated radiation safety system of Indus Accelerator Complex with emphasis to important features of Indus-2 RSS.  
 
WEPMA038 A Study on the Applicability of Landau Cavity to the 1.2 GeV Booster Synchrotron at Tohoku University synchrotron, impedance, injection, target 375
 
  • F. Hinode, K. Akiyama, K. Kasamsook, M. Kawai, A. Kurihara, T. Muto, K. Nanbu, Y. Shibasaki, S. Takahashi, T. Tanaka, M. Yasuda
    Tohoku University, School of Scinece, Sendai
  In these years, a 1.2 GeV Stretcher-Booster (STB) ring at Laboratory of Nuclear Science, Tohoku University, has been mainly operated in the booster-storage mode in which the high energy gamma-ray beam generated via bremsstrahlung from internal target wire has been utilized for experiments of nuclear physics. Beam energy injected from linac is not high enough (150 or 200 MeV), so that radiation damping time is much long. Although the injector linac provides sufficient beam current without beam stacking, circulating beam current decays rapidly due to instabilities before the beam reaches the top energy. One of the main causes in the beam current limitation is supposed to be strong coupled bunch instability due to the cavity HOM. In order to suppress the instability, applicability of a third-harmonic Landau cavity has been studied for the STB. The 1.5 GHz Landau cavity was already manufactured and installed in the ring. Beam commissioning will be started soon. We are also planning to introduce a longitudinal feedback into the STB. We will report the present status of the STB in this conference.  
 
WEPMA051 Development of Wide Band FCT System for Booster Synchrotron of Indus-1 & 2 pick-up, synchrotron, coupling, impedance 396
 
  • P. Pareek, R. S. Shinde, K. Singh
    RRCAT, Indore (M. P.)
  A high precision & non-destructive type of wide band FCT for the measurements of electron current has been developed. This monitoring system is composed of slow & fast FCTs, NiZnCo ferrite toroidal cores, pick up coils, electromagnetic shields & pulse amplifiers. A wide band FCT (rise time 60 ns & decay 1 ms) required for measurement of Electron beam intensity & turn-to-turn observation & stored current accumulation during 1 us pulse injection into Booster Synchrotron. Single FCT can't measure e beam current & turn-by-turn observation from 60 ns to 1 ms. Therefore, we designed & developed two FCTs housed in a single box. The spacing between them is optimized so that coupling between them will not affect pulse shape. The FCT consists of two NiZn ferrite ring cores separable into two pieces for easy setting around ceramic beam duct. A beam intensity of pulse (100 ns ~1 us) beam is monitored by fast rise Current monitor (~ 60 ns)& turn/stored currents monitored by slow FCT (~ 1 us to 1 ms). A wide band FCT showed fast rise & slow decay, high sensitivity (0.050V/mA), linearity within 1 % & good S/N ratio. This paper focuses on FCT designs, construction & their pulse response  
 
WEPMA071 The Design, Fabrication and Performance Testing of the Analog I/Q RF Control System at NSRRC controls, feedback, klystron, 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.  
 
WEPMA096 Rejuvenation of Linac Control System for TLS controls, linac, 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.  
 
WEPMA099 A New, PXI Bus Based, Pattern Memory System for the Siam Photon Source. power-supply, synchrotron, controls, photon 461
 
  • G. G. Hoyes
    NSRC, Nakhon Ratchasima
  A new pattern memory system has been built from PXI bus modules to ramp the booster synchrotron magnet and RF power supplies, replacing an old and proprietary Toshiba system. The new system is compact, rugged, easy to program using LabVIEW, easy to repair and low cost.  
 
THZMA02 Status of the Australian Synrotron project storage-ring, injection, synchrotron, diagnostics 583
 
  • G. LeBlanc
    ASP, Clayton, Victoria
  The Australian Synchrotron, a synchrotron light facility based on a 3-GeV electron storage ring, is currently being commissioned at a site in the Metropolitan District of Melbourne. On July 14, 2006 less than three years after earth moving machines started to prepare the site, beam was captured, accumulated and stored in the storage ring. Storage ring commissioning, and beamline installation and commissioning will continue through March 2007, after which the facility will officially become operational. In this paper we give a brief overview of the facility and its beamlines, followed by the latest results from accelerator commissioning activities.  
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THPMA023 Construction of SSRF Magnet Power Supply System power-supply, controls, storage-ring, linac 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.  
 
THPMA033 Digital Power Supply Development at the PLS power-supply, controls, simulation, feedback 674
 
  • K. M. Ha, J. H. Kim
    PAL, Pohang, Kyungbuk
  Digital power supply controller using the Digital Signal Processor (DSP) and Field Programmable Gate Array (FPGA) has been developed over the year at the Pohang Light Source (PLS). Recently, full digital power supply controller has been completed and tested. A new digital controller is designed as 3U euro-standard size and provides overall performance of the power supplies stability better than 5 ppm short-term stability (< 1 min) and 25 ppm long-term stability (< 12 hours). The digital controller made use of the digital PID current controller with one-pole digital filter and feed-forward voltage ripple compensation control algorithms. By implementation of the digital controller, it is capable of high step resolution (150 ps) Digital Pulse Width Modulation (DPWM) for FET or IGBT switch drivers and high resolution (18-bit, 400 kSPS) analog to digital converter (ADC) for current and voltage signal measurements. In this paper the hardware and software structure of the developed digital controller and experimental results of digital power supply are described.

Pohang Accelerator Laboratory, Pohang, 790-784, Korea* This works supported by the Ministry of Science and Technology, Korea.

 
 
THPMA050 Performance of Cryomodule and Cryogenic Network System for the Superconducting Linac at IUAC. Delhi linac, vacuum, cryogenics, ion 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.  
 
THPMA091 Air Temperature Analysis and Control Improvement for the Injection Area at TLS controls, injection, synchrotron, linac 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.  
 
THPMA104 RF activities of ACCEL Instruments in Asia-Pacific linac, 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.  
 
THPMA115 Present Status of the FFAG Accelerator Complex in KURRI for ADS Study acceleration, proton, ion, extraction 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.