Inagaki, T.

Paper	Title	Page
TU202	Low Emittance 500 kV Thermionic Electron Gun	261
	K. Togawa, H. Baba, T. Inagaki, K. Onoe, T. Shintake, T. Tanaka RIKEN Spring-8 Harima, Hyogo H. Matsumoto KEK, Ibaraki
	A 500 kV pulsed electron gun has been constructed for the injector system of the SASE-FEL project at SPring-8 (SCSS project). A CeB6 single crystal was chosen as a thermionic cathode, because of its excellent emission properties. We have succeeded in generating a 500 keV beam with 1 A peak current and 3 μs FWHM. The beam was very stable with low jitter. The beam emittance has been measured by means of double-slits method, and the normalized rms emittance of 1.1 π·mm·mrad has been obtained. We report on the experimental result on the emittance measurement of the CeB6 electron gun.
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