Upgrade of X-band thermionic cathode RF gun for Compton scattering X-ray source
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- 作者：Yoshihiro Taniguchi ; Fumito Sakamoto ; Takuya Natsui ; Tomohiko Yamamoto ; Eiko Hashimoto ; KiWoo Lee ; Mitsuru Uesaka ; Mitsuhiro Yoshida ; Toshiyasu Higo ; Shigeki Fukuda ; Mitsuo Akemoto
- 关键词：X-band ; Thermionic cathode RF gun ; Compton scattering ; Monochromatic X-ray ; RF coupler
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2009
- 出版时间：1 September 2009
- 年：2009
- 卷：608
- 期：1, Supplement 1
- 页码：S113-S115
- 全文大小：176 K
文摘
A Compton scattering X-ray source consisting of an X-band (11.424 GHz) electron linear accelerator (linac) and Q-switched Nd: YAG laser is currently under development at the University of Tokyo. Monochromatic X-rays are required for a variety of medical and biological applications. The X-ray source produces monochromatic X-rays via collision between a 35-MeV multi-bunch (104 bunches in a 1 μs RF pulse) electron beam and 1.4 J/10 ns (532 nm) Nd: YAG laser pulse. The linac uses an X-band 3.5-cell thermionic cathode RF gun and an alpha magnet as an injector. Until now, electron beam generation (2 MeV, 1 pC/bunch at the exit of the injector), beam acceleration, and X-ray generation have been verified. In order to increase X-ray energy and intensity, we have completed the design and construction of a new RF gun with relevant modifications in some structures. In this paper, we describe the details of the concepts of designing a new RF gun and discuss future works.