Title :
High power testing of a 17 GHz photocathode RF gun
Author :
Chen, S.C. ; Danly, B.G. ; Gonichon, J. ; Lin, C.L. ; Temkin, R.J. ; Trotz, S.R. ; Wurtele, J.S.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
Abstract :
We report experimental high power test results on a high gradient 17 GHz RF photocathode gun. The 1½ cell, π-mode, copper cavity was tested with 5-10 MW, 100 ns, 17.145 GHz pulses from a 24 M W Haimson Research Corp. klystron. A maximum surface electric field of 250 MeV/m was achieved corresponding to an on-axis gradient of 150 MeV/m. The gradient was verified by a preliminary electron beam energy measurement. Conditioning with ~105 shots resulted in a low field emission current, less than 6 mA. Future research will concentrate on measurements of the quality of electron beams produced by ps laser photoemission
Keywords :
accelerator RF systems; accelerator cavities; electron field emission; electron guns; electron sources; klystrons; particle beam diagnostics; particle sources; photocathodes; 1½ cell π-mode cavity; 17 GHz; 17.145 GHz; 24 MW; 5 to 10 MW; 6 mA; Cu; conditioning; electron beam energy measurement; electron beams quality; high gradient; high power testing; klystron; low field emission current; maximum surface electric field; on-axis gradient; photocathode RF gun; picosecond laser photoemission; Cathodes; Electric breakdown; Electron beams; Klystrons; Laser modes; Pulse amplifiers; Pump lasers; Radio frequency; Testing; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505073
