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Cheng, W.C.

Paper Title Page
MOPEA074 Resonant Transition Radiation Induced by an Ultrashort Electron Bunch from Aluminium Foil Stack 244
 
  • W.C. Cheng
    National Chiao Tung University, Hsinchu
  • N.Y. Huang
    NTHU, Hsinchu
  • W.K. Lau
    NSRRC, Hsinchu
  
 

Resonant transition radiation (RTR) driven by a femtosecond electron beam is being studied. An aluminum foil stack with vacuum spacers is used as the radiator. With a 27 MeV electron bunch with pulse duration at ~ 100 fsec incident normally on the aluminum foil stack, high photon yields in hard X-ray regime can be obtained. Characteristics of the radiation such as emission spectrum, spatial distribution are calculated. The dependence of RTR photon yields on beam size and bunch length are also studied.

  
THPD013 Construction of a Thermionic RF Gun Linac System for Ultrashort Electron Beam 4304
 
  • W.K. Lau, J.H. Chen, J.-Y. Hwang, A.P. Lee, C.C. Liang, T.H. Wu
    NSRRC, Hsinchu
  • W.C. Cheng
    National Chiao Tung University, Hsinchu
  • N.Y. Huang
    NTHU, Hsinchu
  
 

A 25-30 MeV S-band linac system that equipped with thermionic cathode rf gun is being constructed at NSRRC for generation of ultrashort relativistitic electron beam. According to simulation studies, high quality GHz repetition rate electron pulses of about 50 pC as short as few tens fsec can be produced. This injector system will be used as the driver for experiments on fsec head-on inverse Compton scattering X-ray source and high power wake field microwave sources. The progress of our construction work will be presented.