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Lee, A. P.

Paper Title Page
TUPMN073 First Operation of a Thermionic Cathode RF Gun at NSRRC 1088
  • A. P. Lee, S.-S. Chang, J.-Y. Hwang, W. K. Lau, C. C. Liang, G.-H. Luo, T.-T. Yang
    NSRRC, Hsinchu
  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.  
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.