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Hsu, S. Y.

Paper Title Page
MOPAN094 Operation Experiences of the Bunch-by-Bunch Feedback System for TLS 383
  • K. T. Hsu, J. Chen, P. C. Chiu, S. Y. Hsu, K. H. Hu, C. H. Kuo, D. Lee
    NSRRC, Hsinchu
  Severe multi-bunch instabilities are bothered the operation of Taiwan Light Source (TLS) during the operation during 2004 just after SRF system upgrade. FPGA-based bunch-by-bunch feedback system was commissioning during late 2005 and early 2006. Multi-bunch instability in both transverse plans and longitudinal are well control. Delivery up to 400 mA stored beam was demonstrated. Transverse feedback system make low chromaticity operation is possible; this is very helpful to improve injection efficiency which are essential for routine top-up operation. Operation experiences of the bunch-by-bunch feedback system will be summary in this report.  
MOPAN103 New Control System for the 50 MeV Linear Accelerator of TLS 404
  • C. Y. Wu, J. Chen, K. T. Hsu, S. Y. Hsu, J.-Y. Hwang, D. Lee, K.-K. Lin, C.-J. Wang
    NSRRC, Hsinchu
  The preinjector of the Taiwan Light Source(TLS) is consist of a 140 kV themionic gun and a 50 MeV traveling wave type linear accelerator system. In order to improve performance, to decouple the vacuum interlock logic from the linac control system, and to provide a better control functionality for top-up operation and to avoid obsolescence, linac control system have been renew. One VME crate system is dedicated for linac control, new hardware equips with high resolution of analog interface to provide better control. Vacuum interlock logic will be done be a dedicated programmable logic controller(PLC). The remained linac devices have sequential control needed will be done by another PLC, such as door access interlock, klystron warm up, gun warm up, trig interlock, gun high voltage interlock, klystron modulator high voltage interlock, water flow interlock. Both interlock and sequence control PLC will control by the VME crate. All the other functions without interlock or sequence requirement will control by the VME crate directly. New control system expects to provide better control functionality, better performance, easy for maintenance, and useful easy to add new hardware equipments.  
TUPMN076 The Fabrication and Characterization of an S-band RF-gun Cavity 1097
  • T.-T. Yang, C.-S. Fann, K. T. Hsu, S. Y. Hsu, J.-Y. Hwang, W. K. Lau, A. P. Lee, C. C. Liang, K.-K. Lin, K.-B. Liu, Y.-C. Liu, H. M. Shih, M.-S. Yeh
    NSRRC, Hsinchu
  A single cell rf-gun cavity is designed and fabricated for the purpose of examining the feasibility of installing a thermionic rf-gun at NSRRC instead of a photocathode rf-gun considered previously. The operating frequency of the rf-gun cavity is set at 2856 MHz in order to utilize the available XK-5 klystron and linac. The fabricated parts of the OFHC copper cavity are brazed together in-house and then the cavity is characterized by rf measurement. It shows that the cavity gives very good character in terms of high quality factor, relaxed tuning range, adequate coupling coefficient, and reasonable reproducibility. The properties of the cavity are further explored by measuring the field profile and its response to an rf pulse in which the filling time is deduced. The measurement results of this brazed cavity are described and summarized in this report.  
FRPMN082 Diagnostic and Timing Supports for Top-Up Injection Operation for the TLS 4252
  • J. Chen, P. C. Chiu, K. T. Hsu, S. Y. Hsu, K. H. Hu, C. H. Kuo, D. Lee, C.-J. Wang, C. Y. Wu
    NSRRC, Hsinchu
  Routine top-up operation of Taiwan Light Source (TLS) was started from October 2005 after high efficiency multi-bunch instabilities suppression system put into service. To support the top-up operation, various diagnostics and timing supports are needed. These include diagnostics for injection efficiency, filling pattern of the storage ring, tune, instability, loss pattern measurement. Timing control of the injection process are also needed. Design consideration and details of these efforts will be summary in this report. Further possible improvement will be also discussed.  
FRPMN085 Application of the IEEE-1394 and the GigE Vision Digital Cameras for Diagnostics in Taiwan Light Source 4270
  • C. H. Kuo, J. Chen, K. T. Hsu, S. Y. Hsu, K. H. Hu, D. Lee, C.-J. Wang, C. Y. Wu
    NSRRC, Hsinchu
  Digital camera has been adopted for the booster, storage ring and transport-line diagnostic recently at the Taiwan Light Source. The system provides low image distortion and lossless image transmission over long distances. The system is integrated with commercial software in the control system. The fully remote control supports various operations and application that is useful. These applications include of screen monitor equip in the booster and storage ring, wider dynamic range sensor and highly flexibility control for the emittance measurement in the transport line, booster and linac. System configuration and present status will be summarized in this report.