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REVIEW OF RECENT DEVELOPMENT OF PHOTOINJECTORS IN JAPAN

    https://doi.org/10.1142/9789812705235_0011Cited by:0 (Source: Crossref)
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    Abstract:

    Systematic developments of the photoinjectors for ultrashort and high quality electron beam works are under way in Japan. Sumitomo Heavy Industries succeeded in transformation of the Gaussian shape to the trapezoidal one in the temporal and transverse profiles of the drive laser and achieved 0.9 πmm.mrad with 1 nC/bunch. It is the best data in the transverse aspect. Himeji Inst. Tech. is operating very unique needle-shaped photocathode RF gun with the original Nd/Glass laser for IR-FEL and Compton scattering X-rays. U.Tokyo/JASRI(SPring8)/KEK/NIRS/BNL/etc. are developing and operating the S-band photoinjectors with Cu, Mg and Cs2Te cathodes, and transmission-type one in near future. Further, U.Tokyo/KEK/NIRS are designing and constructing a new X-band RF-gun/linac/laser system to generate inverse Compton scattering hard X-rays(33-50keV) for intravenous angiography.