Time-resolved emittance measurements of an excimer-laser-driven metal photocathode
Abstract
The velvet cathode material of a 4-MeV, electron beam injector was replaced with a metal cathode and driven by an ArF excimer laser. Time resolved measurements of photo electron 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 formation 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.
- Publication:
-
IEEE Particle Accelerator Conference
- Pub Date:
- May 1991
- Bibcode:
- 1991IPAC.........6K
- Keywords:
-
- Beam Injection;
- Electron Beams;
- Emittance;
- Excimer Lasers;
- Linear Accelerators;
- Magnetic Probes;
- Photocathodes;
- High Speed Cameras;
- Photoconductors;
- Relativistic Particles;
- Streak Cameras;
- Temperature Measurement;
- Lasers and Masers