Speaker
Description
The Shenzhen Superconducting Soft X-ray Free Electron Laser (S3FEL) requires a high-quality electron beam with stable energy, bunch length, and arrival time to ensure efficient lasing. To maintain stringent beam quality, a comprehensive beam feedback system has been preliminarily designed, incorporating five dedicated feedback loops:
1.Gun Feedback: Monitors bunch charge and arrival time after the electron gun, controlling the input laser power and delay to stabilize charge and timing.
2.Laser Heater Feedback: Measures beam energy at the laser heater and adjusts the RF amplitude of small module CM00 and large module CM01 accordingly.
3.Bunch Compressor 1 (BC1) Feedback: Monitors beam energy, energy spread, and bunch length in BC1, regulating RF amplitude and phase of large modules CM02, CM03 and harmonic cavities CMH01, CMH02.
4.Bunch Compressor 2 (BC2) Feedback: Similarly monitors beam parameters in BC2 and controls RF amplitude and phase of large modules CM04–CM09.
5.Linac End Feedback: Measures final beam energy and adjusts RF amplitude and phase of large modules CM10–CM20 to ensure energy stability before transport to the undulator.
This integrated feedback design aims to suppress slow drifts, enhance beam stability, and provide the reliable beam quality required for high-performance soft X-ray FEL operation at S3FEL.
Funding Agency
the National Natural Science Foundation of China (Grant No. 12405221)
| Paper status | Proceeding files received |
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