On the photocathodes used at the TTF photoinjector

Author

Schreiber, S. ; Michelato, P. ; Monaco, L. ; Sertore, D.

Author_Institution

DESY, Hamburg, Germany

Volume

3

fYear

2003

fDate

12-16 May 2003

Firstpage

2071

Abstract

Since the start-up of the laser driven rf gun based photoinjector at the TESLA Test Facility (TTF) late 1998, several cathodes have been used. We report on the properties of Cs₂Te and KCsTe cathodes under operating conditions, their quantum efficiency and lifetime. Darkcurrent emitted by the RF gun or the cathodes have been a major concern in the first year of operation. Meanwhile, new cathode production techniques and a conditioning effect of the RF gun has reduced the darkcurrent significantly.

Keywords

accelerator RF systems; caesium compounds; electron accelerators; electron beams; electron guns; linear accelerators; particle beam diagnostics; particle beam injection; particle beam stability; photocathodes; potassium compounds; 1998; Cs₂Te; Cs₂Te cathodes; KCsTe; KCsTe cathodes; TESLA Test Facility; TTF photoinjector; cathode production techniques; darkcurrent; laser driven rf gun; lifetime; operating conditions; photocathodes; quantum efficiency; Cathodes; Free electron lasers; Laser mode locking; Optical pulses; Plugs; Pulse measurements; Radio frequency; Solid lasers; Tellurium; Test facilities;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288782

Filename

1288782