BXERL photo-injector based on a 217 MHz normal conducting RF gun

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LIU Sheng-Guang, HUANG Tong-Ming and XU Jin-Qiang. BXERL photo-injector based on a 217 MHz normal conducting RF gun[J]. Chinese Physics C, 2011, 35(9): 865-869. doi: 10.1088/1674-1137/35/9/015
LIU Sheng-Guang, HUANG Tong-Ming and XU Jin-Qiang. BXERL photo-injector based on a 217 MHz normal conducting RF gun[J]. Chinese Physics C, 2011, 35(9): 865-869.  doi: 10.1088/1674-1137/35/9/015 shu
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Received: 2010-06-21
Revised: 2011-05-06
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BXERL photo-injector based on a 217 MHz normal conducting RF gun

    Corresponding author: LIU Sheng-Guang,

Abstract: The Beijing X-ray Energy Recovery Linac (BXERL) test facility is proposed in Institute of High Physics (IHEP). In this proposal, the main linac requires the injector to provide an electron beam with 5 MeV energy and 10 mA average current. An injector based on DC gun technology is the first candidate electron source for BXERL. However, the field emission in the DC gun cavity makes it much more difficult to increase the high voltage to more than 500 kV. Another technology based on a 217 MHz normal conducting RF gun is proposed as the backup injector for this test facility. We have designed this RF gun with 2D SUPERFISH code and 3D MICROWAVE STUDIO code. In this paper, we present the optimized design of the gun cavity, the gun RF parameters and the set-up of the whole injector system. The detailed beam dynamics have been done and the simulation results show that the injector can generate electron bunches with RMS normalized emittance 1.0 uppi mmcdotmrad, bunch length 0.77 mm, beam energy 5.0 MeV and energy spread 0.60%.

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