NDLI: EXPERIMENTAL OPERATION OF A 17 GHz PHOTOCATHODE RF GUN

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EXPERIMENTAL OPERATION OF A 17 GHz PHOTOCATHODE RF GUN

Content Provider	Semantic Scholar
Author	Trotz, S. R. Brown, William J. Danly, B. G. Hogge, J. P. Kreischer, Kenneth E. Shapiro, M. A. Temkin, Richard J.
Copyright Year	1998
Abstract	Initial operation of a 17 GHz RF photocathode electron gun has been achieved at MIT. This is the first photocathode electron gun to operate at a frequency above 2.856 GHz. Such electron guns have the potential for achieving record high values of electron beam quality. The 1.5 cell, p-mode, copper cavity was tested with 5-10 MW, 100 ns, 17.145 GHz pulses from a klystron amplifier built by Haimson Research Corp. Conditioning resulted in a maximum surface field of 250 MV/m. Dark current of 0.5 mA was observed at 175 MV/m, consistent with Fowler-Nordheim field emission theory if a field enhancement factor of about 100 is assumed. Electron bunches were generated by a regenerative laser amplifier that produces 20-40 mJ UV pulses. Faraday cup measurements indicated 0.12 nC bunches were produced with a kinetic energy of about 1 MeV. This corresponds to a peak current of about 120 A, and a density at the cathode of 8.8 kA/cm. Phase scans of laser induced emission reveal an overall phase stability of better than ±20°, corresponding to ±3 ps synchronization of the laser pulses to the microwave field.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://accelconf.web.cern.ch/accelconf/pac97/papers/pdf/2C011.PDF
Language	English
Access Restriction	Open
Subject Keyword	Assumed Dark current (physics) Data General Eclipse MV/8000 Dental caries Faraday cage Field electron emission Kinetics Microwave Optical amplifier Protected mode Radio frequency corporation electron beam
Content Type	Text
Resource Type	Article

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