Volume 33 Issue 9
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Article Navigation >  High Power Laser and Particle Beams  > 2021  >  33(9): 094002
Ma Tianjun, Sun Jianhai, Hao Baoliang, et al. Microfabrication of folded waveguide using UV-LIGA for 220 GHz traveling wave tube[J]. High Power Laser and Particle Beams, 2015, 27: 024101. doi: 10.11884/HPLPB201527.024101
Citation: Li Cheng, Wang Wenxing, Li Weiwei, et al. Drive laser shaping and transport system for photocathode RF gun[J]. High Power Laser and Particle Beams, 2021, 33: 094002. doi: 10.11884/HPLPB202133.210091
shu

Drive laser shaping and transport system for photocathode RF gun

doi: 10.11884/HPLPB202133.210091
  • 1.

    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

Funds:  Hefei Advanced Light Facility R&D Project
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    Abstract
  • To meet the requirements of Hefei Advanced Light Facility (HALF) for high quality injection beam, a photocathode RF gun is developed as the electron source of the injector in the R&D project. To obtaining an electron beam with high qualities, it is necessary to carry out experimental research on drive laser shaping and transport system. For suppressing the beam emittance growth caused by space charge force, the temporal pulse shape is modified by using birefringent crystals, while an aperture is used for spatial pulse shaping. An optical image transport system is designed to achieve high stability of the laser beam position on the photocathode. Detailed design of the optical system is presented in this paper. The experimental result shows that a quasi uniform distribution in the three-dimensional space of laser pulse is obtained, and the laser beam position jitter on the photocathode is less than 4 µm. The performance of the laser pulse meets the experiment requirements.
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