Experimental results from a DC photocathode electron gun for an IR FEL
A 350 keV DC photocathode gun capable of delivering the high-brightness CW electron beam necessary for Jefferson Lab`s infrared free-electron laser is described. The gun is to be used with a superconducting radiofrequency linac operating at 1.497 GHz and is mode-locked to the 40th subharmonic of the fundamental using a Nd:YLF drive laser. The gun provides 20--25 ps bunches at up to 135 pC/bunch. Experimental measurements of transverse and longitudinal beam properties are presented. Transverse emittance is measured using a slit-wire scanner emittance meter, and energy spread is measured using the slit and a spectrometer magnet. Longitudinal emittance is measured using a combination of sampling aperture, kicker cavity, slit and spectrometer. Measurements for bunch charges of 135 pC are described and compared with simulations.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States); Office of Naval Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 541916
- Report Number(s):
- DOE/ER/40150-1174; JLAB-ACP-97-09; CONF-970885-; ON: DE98000365; BR: KC0101000; TRN: 98:008498
- Resource Relation:
- Conference: FEL `97: international free electron laser conference and 4. free electron laser users` workshop, Beijing (China), 18-22 Aug 1997; Other Information: PBD: [1997]
- Country of Publication:
- United States
- Language:
- English
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