Title :
Time-resolved emittance measurements of an excimer-laser-driven metal photocathode
Author :
Kauppila, T. ; Carlson, R. ; Moir, D. ; Ridlon, R.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
The velvet cathode material of a 4-MeV, electron beam injector was replaced with a material cathode and driven by an ArF excimer laser. Time-resolved measurements of photoelectron current and effective cathode temperature were made. A streak camera and B-dot (magnetic field) probes were the primary diagnostics for the experiment. The streak camera determined effective cathode temperature in a single spatial dimension. Time-integrated photography was used to observe plasma information in the cathode region. The results will be used to ascertain the feasibility of long-pulse (75-ns) beam generation for injection into a linear induction accelerator.<>
Keywords :
electron emission; electron sources; laser beam applications; photocathodes; photoemission; 4 MeV; 75 ns; ArF excimer laser; B-dot probes; beam generation; effective cathode temperature; electron beam injector; excimer-laser-driven metal photocathode; linear induction accelerator; photoelectron current; plasma information; streak camera; time resolved emittance measurements; Cameras; Cathodes; Current measurement; Electron beams; Magnetic field measurement; Magnetic materials; Optical materials; Plasma measurements; Plasma temperature; Probes;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164881
