Author: Murakami, T.
Paper Title Page
WEPAB048 Design of an Optical Cavity for Generating Intense THz Pulse Based on Coherent Cherenkov Radiation 2711
 
  • P. Wang, Y. Koshiba, T. Murakami, K. Murakoshi, K. Sakaue, Y. Tadenuma, M. Washio
    Waseda University, Tokyo, Japan
  • R. Kuroda
    AIST, Tsukuba, Japan
  • K. Sakaue
    The University of Tokyo, Graduate School of Engineering, Bunkyo, Japan
  
  We have been study­ing ter­a­hertz (THz) gen­er­a­tion via Cherenkov ra­di­a­tion with high-qual­ity elec­tron beams from a pho­to­cath­ode rf (radio fre­quency) gun. In our early stud­ies, we have suc­ceeded in the gen­er­a­tion of co­her­ent Cherenkov ra­di­a­tion by con­trol­ling the tilt of the elec­tron beam using an rf-de­flec­tor. For fur­ther en­hance­ment, we are plan­ning to stack the THz pulses in an op­ti­cal cav­ity. Multi-bunch op­er­a­tion of the rf-gun will gen­er­ate elec­tron beams with a rep­e­ti­tion rate of 119 MHz, and THz pulses as well. These pulses will be ac­cu­mu­lated in the cav­ity for up to 150 pulses. In this con­fer­ence, we re­port the de­sign study of the en­hance­ment cav­ity and dis­cuss the per­for­mance of the THz source.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB048  
About • paper received ※ 19 May 2021       paper accepted ※ 02 June 2021       issue date ※ 18 August 2021  
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WEPAB052 Development of an EO Sampling System for the Analysis of THz Waves Generated by Coherent Cherenkov Radiation 2718
 
  • K. Murakoshi, Y. Koshiba, T. Murakami, K. Sakaue, Y. Tadenuma, P. Wang, M. Washio
    Waseda University, Tokyo, Japan
  • R. Kuroda
    AIST, Tsukuba, Japan
  • K. Sakaue
    The University of Tokyo, Graduate School of Engineering, Bunkyo, Japan
  
  THz waves, lo­cated be­tween mi­crowaves and light waves, have trans­parency, di­rec­tion­al­ity and fin­ger­print spec­trum of spe­cific ma­te­ri­als. There­fore, they are ex­pected to be use­ful for var­i­ous ap­pli­ca­tions. We have been study­ing THz waves gen­er­a­tion via Cherenkov ra­di­a­tion with elec­tron beams from a pho­to­cath­ode rf-gun. In our early stud­ies, we have suc­ceeded in the gen­er­a­tion of co­her­ent Cherenkov ra­di­a­tion by tilted elec­tron beams using an rf-de­flec­tor. Fur­ther­more, we have gen­er­ated quasi-mono­chro­matic THz waves by spa­tially mod­u­lated elec­tron beams and have suc­ceeded in its mea­sure­ment by band­pass fil­ters. This study aims to ob­tain the THz wave form in time do­main by elec­tro-op­tic (EO) sam­pling, which is an use­ful de­tec­tion sys­tem for ob­tain­ing the in­for­ma­tion of the elec­tric field and the phase si­mul­ta­ne­ously with high S/N. In this con­fer­ence, we re­port about our probe laser sys­tem, re­sults of the time-do­main spec­troscopy mea­sure­ment of THz waves by EO sam­pling, and fu­ture prospects.  
poster icon Poster WEPAB052 [0.861 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB052  
About • paper received ※ 19 May 2021       paper accepted ※ 07 June 2021       issue date ※ 31 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)