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Palmer, D.T.; Miller, R.H.; Wang, X.J.; Ben-Zvi, I.
Brookhaven National Lab., Upton, NY (United States); Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1997
Brookhaven National Lab., Upton, NY (United States); Stanford Linear Accelerator Center, Menlo Park, CA (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1997
AbstractAbstract
[en] A 1.6 cell photocathode S-Band gun developed by the BNL/SLAC/UCLA collaboration is now in operation at the Brookhaven Accelerator Test Facility (ATF). One of the main features of this RF gun is the symmetrization of the RF coupling iris with an identical vacuum pumping port located in the full cell. The effects of the asymmetry caused by the RF coupling iris were experimentally investigated by positioning a metallic plunger at the back wall of the vacuum port iris. The higher order modes produced were studied using electron beamlets with 8-fold symmetry. The 8-fold beamlets were produced by masking the laser beam. These experimental results indicate that the integrated electrical center and the geometrical center of the gun are within 175 microm. Which is within the laser alignment tolerance of 250 microm
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1997; 4 p; 17. IEEE particle accelerator conference; Vancouver (Canada); 12-16 May 1997; CONF-970503--80; CONTRACT AC02-76CH00016; Also available from OSTI as DE97006714; NTIS; US Govt. Printing Office Dep
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Report
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Conference; Numerical Data
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