A High Current, Short Pulse, RF Synchronized Electron Gun for the Stanford Linear Accelerator

Program Document · Wed Jun 13 04:00:00 EDT 2018

OSTI ID:1445992

Sinclair, C. ^[1]

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1. Stanford Univ., CA (United States). Stanford Linear Accelerator Center (SLAC)

For the generation of intense single and multiple bunches of electrons (>8 nc per bunch) for accelerator studies at SLAC, a high peak current photoemission electron gun has been developed. A gallium arsenide photocathode is illuminated by the optical beam from a frequency doubled, actively mode-locked and Q-switched Nd:YAG laser. The mode-locked optical pulses are of variable, sub-nanosecond width and occur with a spacing of 8.4 nsec, synchronized with the 2856 MHz accelerator rf. The gun is designed to be space charge limited at 15 A and 200 kV, although emission of 60 A was obtained with a 57 kV test structure, corresponding to a current density of 180 A/cm². With the proper choice of laser wavelength, the electron beam may be 40% longitudinally polarized.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1445992
• Report Number(s): SLAC-PUB--2705
• Country of Publication: United States
• Language: English