Chiu, P. C.

Paper	Title	Page
WEOCG02	Post-mortem Diagnostic for the Taiwan Light Source	1932
	K. H. Hu, J. Chen, P. C. Chiu, K. T. Hsu, S. Y. Hsu, C. H. Kuo, D. Lee, C.-J. Wang, C. Y. Wu NSRRC, Hsinchu
	Analyzing the reasons of various trip events is essential to improve reliability of a synchrotron light source. To identify the causes of trip at Taiwan Light Source (TLS), various diagnostics tool were employed. These diagnostic tools can capture beam trip, interlock signals of superconducting RF system, waveform of the injection kickers, quench and interlock signals of the superconducting insertion device, and instability signals of the stored beam for post-mortem analysis. These diagnostics can be routine monitor signal and record beam trip event. Features of trip diagnostic tools are available now. System configuration experiences will be summarized in this report.
	Slides
THPC119	Progress of TLS Fast Orbit Feedback System and Orbit Stability Studies	3260
	C. H. Kuo, J. Chen, P. C. Chiu, K. T. Hsu, K. H. Hu, D. Lee NSRRC, Hsinchu
	The orbit feedback system of the TLS has been deployed for a decade and continuously upgraded. However, due to limitation of the existing hardware, the system cannot remove orbit excursion caused by the perturbation due to fast operation of insertion devices. The newly proposed orbit feedback system with the upgraded digital BPM system and switching corrector power supply system is planned to be installed and commissioned in late 2008. The preliminary calculation on the stability performance for the orbit feedback system is presented in the report. New fast orbit feedback system can be expected to achieve a submicron stability of the electron beam working at a bandwidth of at least 60 Hz.
THPC120	Conceptual Design and Performance Estimation of The TPS Fast Orbit Feedback System	3263
	P. C. Chiu, J. Chen, K. T. Hsu, K. H. Hu, C. H. Kuo NSRRC, Hsinchu
	A 3 GeV Synchrotron (TPS) is proposed in Taiwan. Its storage ring consists of 24 double-bend cells with 6-fold symmetry and the circumference is 518.4m. The report presents the initial design of the fast orbit feedback system (FOFB) for TPS. The system uses 168 BPMs and 168 correct magnets to stabilize global closed orbit at 10 kHz updated rate. The different subsystems are modeled: the BPM systems, the corrector magnet, vacuum chamber, and etc. The latency of the communication and computation is also studied. The preliminary calculation on the stability performance for the orbit feedback system is presented in the report. The FOFB is expected to achieve a submicron stability of the electron beam working at a bandwidth of at least 100 Hz.