Design studies on a 500 kV DC gun photo-injector for the BXERL test facility

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LIU Sheng-Guang and XU Jin-Qiang. Design studies on a 500 kV DC gun photo-injector for the BXERL test facility[J]. Chinese Physics C, 2011, 35(1): 88-91. doi: 10.1088/1674-1137/35/1/018
LIU Sheng-Guang and XU Jin-Qiang. Design studies on a 500 kV DC gun photo-injector for the BXERL test facility[J]. Chinese Physics C, 2011, 35(1): 88-91.  doi: 10.1088/1674-1137/35/1/018 shu
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Received: 2010-04-24
Revised: 2010-06-01
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Design studies on a 500 kV DC gun photo-injector for the BXERL test facility

Abstract: BXERL is a proposal for a test facility (Beijing X-ray Energy Recovery Linac), which requires its injector to provide an electron beam of 5 MeV, 77 pC/ bunch at a repetition rate of 130 MHz (average current of 10 mA). In this paper, we present the design of the injector, which consists of a 500 kV photocathode DC gun equipped with a GaAs cathode preparation device, a 1.3 GHz normal conducting RF buncher, two solenoids, and one cryomodule containing two 1.3 GHz 2-cell superconducting RF cavities as the energy booster. The detailed beam dynamics show that the injector can generate electron bunches with a RMS normalized emittance of 1.49 πmm·mrad, a bunch length of 0.67 mm, a beam energy of 5 MeV and an energy spread of 0.72%.

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