| Paper | Title | Page |
|---|---|---|
MOPB011 |
Bunch Adaptive Shaping Based on Spatial Light Modulator | |
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| The second generation of direct current-superconducting radio frequency (DC-SRF-¿) photocathode electron gun drive laser system utilizes a liquid crystal-spatial light modulator (SLM) to generate high-fidelity shaped laser beams with arbitrary spatial profiles by the polarization-mask shaping method. These adaptive lasers are then transmitted to the photocathode of photocathode electron gun can generate electron bunches with special spatial distributions. The electron beams distribution can be produced highly similar to the laser, where space charge is negligible. Based on the electron beams imaging, this work proposes a method for rapidly quantum efficiency (QE) mapping under low-charge conditions, and then using a feedback method by adjusting laser distribution to produce more uniform electron beam. This method can correct irregularities caused by both laser distribution and spatial QE. At present, the experiments have been preliminarily carried out on the DC-SRF-II of Peking University. | ||
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