| Paper |
Title |
Page |
| TUPMN072 |
Current Status of Lattice Design and Accelerator Physics Issues of the 3 GeV Taiwan Synchrotron Light Source
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1085 |
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- C.-C. Kuo, H.-P. Chang, H. C. Chao, P. J. Chou, W. T. Liu, G.-H. Luo, H.-J. Tsai, M.-H. Wang
NSRRC, Hsinchu
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In the past years, we have been conducting a design work for a synchrotron light facility with low emittance storage ring in the intermediate energy range in NSRRC. A number of design options with different lattice structure types, circumferences, etc., are compared. We present one design case with 24-cell DBA structure and 486 m circumference. The associated accelerator physics issues are discussed.
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| TUPMN073 |
First Operation of a Thermionic Cathode RF Gun at NSRRC
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1088 |
| |
- A. P. Lee, S.-S. Chang, J.-Y. Hwang, W. K. Lau, C. C. Liang, G.-H. Luo, T.-T. Yang
NSRRC, Hsinchu
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An injector system that based on rf gun technology is being constructed at NSRRC. This will be a 100 MeV beam injector that consists of an rf linac with a thermionic cathode rf gun as electron source. The superior performance and special configuration of the thermionic rf gun system made it an attractive option as a reliable pre-injector booster synchrotron. In cooperation with an alpha-magnet as low energy bunch compressor, ultra-fast electron beam pulses as short as 100 fs can be generated from the thermionic cathode rf gun for generation of intense coherent short wavelength radiations, production of femto-second electron and wavelength tunable ultra-fast X-ray pulses. First operation of the thermionic rf gun will be presented.
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| TUPMN074 |
Improvements to the Injection Efficiency at the Taiwan Light Source
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1091 |
| |
- Y.-C. Liu, H.-P. Chang, J. Chen, P. J. Chou, K. T. Hsu, K. H. Hu, C. H. Kuo, C.-C. Kuo, K.-K. Lin, G.-H. Luo, M.-H. Wang
NSRRC, Hsinchu
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Taiwan light source started the 200 mA top-up operation in October 2005, and the stored beam current was subsequently ramped up to 300 mA top-up operation. In the early phase of top-up operation, the injection efficiency had large variation at different machine condition. We have developed the procedures to maintain the injection efficiency. These optimization procedures will be activated whenever the injection efficiency degrades during the top-up operation of TLS.
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| TUPMN075 |
BEAM LIFETIME ESTIMATION FOR TAIWAN 3GEV SYNCHROTRON LIGHT SOURCE
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1094 |
| |
- W. T. Liu, H.-P. Chang, H. C. Chao, P. J. Chou, C.-C. Kuo, G.-H. Luo, H.-J. Tsai, M.-H. Wang
NSRRC, Hsinchu
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The demanding design features of Taiwan Photon Source (TPS), low emittance and small gap undulator vacuum vessels, cause Touschek scattering and gas scattering to play a major limitation role for beam lifetime. We calculate the Touschek lifetime based on the tracking procedure determining energy acceptance. The nonlinear synchrotron oscillation due to large second-order momentum compaction factor is included in the energy acceptance calculations. Small vertical ID gaps are imposed in the tracking procedure. Besides, the gas scattering lifetime is estimated with varying gas pressure. The possible improvement solutions for lifetime will be addressed.
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| FRPMN081 |
A Preliminary Study of Beam Instabilities in Top-up Operation at Taiwan Light Source
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4246 |
| |
- P. J. Chou, H.-P. Chang, K. T. Hsu, K. H. Hu, C.-C. Kuo, G.-H. Luo, M.-H. Wang
NSRRC, Hsinchu
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The storage ring of Taiwan Light Source started to operate fully in top-up mode since October 2005. The beam current has been gradually increased to 300 mA in routine user operation. Phenomena of collective effects were observed at 300 mA in top-up operation mode. Active feedback systems were implemented to stabilize the beam in top-up mode. Results of beam observation and analysis will be presented.
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