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《中国物理C》(英文)编辑部
2024年10月30日

Simulation study of a photo-injector for brightness improvement in Thomson scattering X-ray source via ballistic bunching

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DING Yun-Ze, DU Ying-Chao, ZHANG Zhen and HUANG Wen-Hui. Simulation study of a photo-injector for brightness improvement in Thomson scattering X-ray source via ballistic bunching[J]. Chinese Physics C, 2014, 38(2): 027003. doi: 10.1088/1674-1137/38/2/027003
DING Yun-Ze, DU Ying-Chao, ZHANG Zhen and HUANG Wen-Hui. Simulation study of a photo-injector for brightness improvement in Thomson scattering X-ray source via ballistic bunching[J]. Chinese Physics C, 2014, 38(2): 027003.  doi: 10.1088/1674-1137/38/2/027003 shu
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Received: 2013-04-25
Revised: 1900-01-01
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Simulation study of a photo-injector for brightness improvement in Thomson scattering X-ray source via ballistic bunching

    Corresponding author: DU Ying-Chao,

Abstract: Increasing the peak brightness is beneficial to various applications of the Thomson scattering X-ray source. A higher peak brightness of the scattered X-ray pulse demands a shorter scattering electron beam realized by beam compression in the electron beam-line. In this article, we study the possibility of compressing the electron beam in a typical S-band normal conducting photo-injector via ballistic bunching, through just adding a short RF linac section right behind the RF gun, so as to improve the peak brightness of the scattered x-ray pulse. Numerical optimization by ASTRA demonstrates that the peak current can increase from 50 A to > 300 A for a 500 pC, 10 ps FWHM electron pulse, while normalized transverse RMS emittance and RMS energy spread increases very little. Correspondingly, the peak brightness of the Thomson scattering X-ray source is estimated to increase about three times.

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