摘要
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%.
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%.
基金
Supported by Creative Research Foundation of Institute of High Energy Physics (H85453G0U2)
Key Project of Chinese National Programs for Fundamental Research and Development (2008CB817700)
