Volume 33 Issue 2
Jan.  2021
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Shi Yiping, Yi Chaolong, Fan Yajun, et al. Design and experiments on a kind of high-power coplanar-feed impulse radiating antenna[J]. High Power Laser and Particle Beams, 2016, 28: 043001. doi: 10.11884/HPLPB201628.123001
Citation: Fan Peiliang, He Xiaozhong, Yang Liu, et al. Simulation of the solenoid scan method used in overlapping field for thermal emittance measurement[J]. High Power Laser and Particle Beams, 2021, 33: 024003. doi: 10.11884/HPLPB202133.200197
shu

Simulation of the solenoid scan method used in overlapping field for thermal emittance measurement

doi: 10.11884/HPLPB202133.200197

  • Institute of Fluid Physics, CAEP, Mianyang 621900, China

  • Received Date: 2020-07-13
  • Rev Recd Date: 2020-10-21
  • Publish Date: 2021-01-07
    Abstract
  • In one high repetition frequency X-ray free electron laser (XFEL) equipment, the electron gun and compensate solenoid have special structure in the photoinjector, thus the electric field and the magnetic field overlaps near the cathode. The thermal emittance of the cathode should be measured in the experiment. The solenoid scan method used to measure the thermal emittance is not suitable for the overlapping field, because it works effectively only when the rms emittance keeps constant. As the normalized phase space can avoid the influence of the electric field, we tried to use the solenoid scan method in normalized phase space. Using simulation code to do simulations and analysis, we finally demonstrate that this method is feasible for measurement of thermal emittance of the photoinjector which has overlapping field.
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    • References(16)
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