Multi-kiloampere, electron-beam generation using metal photo-cathodes driven by ArF and KrF lasers
Conference
·
OSTI ID:279599
An electron-beam-pumped laser operating at ArF (193 nm) or KrF (248 nm) producing 35 MW (3.5 J in 100 ns) has been used to illuminate a micro-machined aluminum cathode. The cathode was pulsed to 2.75 MV at fields of 185 kV/cm (15-cm AK gap) using REX[1,2](a 4-MV, 5-kA,85-ns) pulsed-diode machine. The extracted current versus incident laser power, and therefore, quantum efficiency was measured for KrF at 5x10{sup -5}; ArF was significantly higher at 1x10{sup -3}. Current densities of 100 A/cm{sup 2} and total currents of 2 kA have been achieved, the latter by increasing the cathode area in proportion to the laser power.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 279599
- Report Number(s):
- LA-UR-96-1932; CONF-960610-14; ON: DE96012738
- Resource Relation:
- Conference: BEAMS `96: 11. international conference on high-power particle beams, Prague (Czech Republic), 10-14 Jun 1996; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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