Electron Emission of over A/cm2 from a Pulsed-Laser Irradiated Photocathode
Abstract
High-current-density, bunched electron beams with low emittance are required for efficient operation of RF-linac-driven free-electron lasers (FELs). Laser-irradiated, photoemissive electron sources are suitable for this application. Currents of over 200 A have been generated in an ultrahigh vacuum chamber from a 1-sq cm Cs3Sb photocathode irradiated by a frequency-doubled, Q-switched pulse from a Nd:glass laser. These currents are over two times larger than previously reported from any photocathode. The duration of the electron pulse was 50 ns (FWHM), corresponding to the width of the 532-nm laser pulse.
- Publication:
-
IEEE Transactions on Nuclear Science
- Pub Date:
- October 1985
- DOI:
- 10.1109/TNS.1985.4334269
- Bibcode:
- 1985ITNS...32.3045L
- Keywords:
-
- Electron Beams;
- Electron Emission;
- Free Electron Lasers;
- Photocathodes;
- Pulsed Lasers;
- Electron Bunching;
- Linear Accelerators;
- Vacuum Chambers;
- Nuclear and High-Energy Physics