Experience with a radio frequency gun on the SSRL Injector Linac

Author

Weaver, J.N. ; Genin, R.D. ; Golceff, P. ; Morales, H. ; Sebek, J.

Author_Institution

Stanford Linear Accel. Center, Stanford Univ., CA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

3018

Abstract

A-SSRL/Varian-Associates-built, one-and-a-half cavity, microwave, thermionic-cathode gun has operated on the SSRL Injector Linac reliably without changing the cathode for over 10,000 hours, with no significant decrease in emission. Thus, for a pulsed electron beam, with a maximum of 0.5 A peak at 2 to 3 MeV from a 3.5 MW peak rf pulse of 2 μs pulse width at 10 pps, the apparent but small amount of back bombardment of the cathode has been tolerable. Use of a bunch-compression alpha magnet and a stripline chopper after the gun produces the required S-band 3 to 5 microbunches of electrons for injection into a standard 10-m-long linac and on into a booster synchrotron, which in turn is used to fill SPEAR. Component limitations and operating characteristics of the gun and the linac´s rf system are discussed

Keywords

electron guns; electron sources; thermionic cathodes; 2 mus; 2 to 3 MeV; 3.5 MW; Injector Linac; S-band; SSRL; bunch-compression alpha magnet; pulsed electron beam; radio frequency gun; rf system; stripline chopper; thermionic-cathode gun; Choppers; Electrons; Linear accelerators; Linear particle accelerator; Pulse measurements; RF signals; Radio frequency; Space vector pulse width modulation; Synchrotron radiation; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309536

Filename

309536