Longitudinal emittance compensation in a photocathode RF gun injector
- Brookhaven National Lab., Upton, NY (United States). Accelerator Test Facility
Electron beam bunch compression directly from photocathode RF gun injector was experimentally observed at the Brookhaven Accelerator Test Facility (ATF). The analysis presented in this report shows that, the configuration of transverse space-charge emittance compensation photoinjector can also be operated in bunch length compression mode for modest amount charge (< 1.0 nC), i.e., longitudinal emittance compensation. For a constant laser energy, the electron beam bunch length almost linearly decrease with the RF gun phase, and the compression ratio as large as factor of 30 was experimentally observed for a 40 pC charge. The authors also discuss the effect of electron beam bunching inside the RF gun on the transverse emittance, and compared with experimental results.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States); Stanford Linear Accelerator Center, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016; AC03-76SF00515
- OSTI ID:
- 495802
- Report Number(s):
- BNL--64468; CONF-970503--77; ON: DE97006719
- Country of Publication:
- United States
- Language:
- English
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