Author :
Dowell, D. ; Davis, K. ; Friddell, K. ; Tyson, E. ; Lancaster, C. ; Milliman, L. ; Rodenburg, R. ; Aas, T. ; Bemes, M. ; Bethel, S. ; Johnson, P. ; Murphy, K. ; Whelen, C. ; Adamski, J. ; Pistoresi, D. ; Shoffstall, D. ; Busch, G. ; Remelius, D.
Author_Institution :
Defense & Space Group, Boeing Co., Seattle, WA, USA
Abstract :
Tests of the Boeing Average Power Laser Experiment (APLE) injector have demonstrated first-time operation of a photocathode RF gun electron accelerator at 25% duty factor. The multi-alkali photocathode was illuminated by a frequency-doubled mode-locked Nd:YLF laser. The cathode was placed in the first cell of four single-cell cavities resonant at 433 MHz. The 4 cavities accelerated the beam to 5 MeV. The pulse duration was 8.3 ms and the repetition rate was 30 Hz. True average beam currents of up to 35 mA have been accelerated to 5 MeV for an average beam power of 170 kilowatts. The 35 mA beam current exceeded previous photocathode performance by a factor of 1000
Keywords :
electron accelerators; electron guns; linear accelerators; photocathodes; APLE injector; Boeing Average Power Laser Experiment injector; frequency-doubled mode-locked Nd:YLF laser; high duty factor photoinjector; multi-alkali photocathode; photocathode RF gun electron accelerator; single-cell cavities; Acceleration; Cathodes; Electron accelerators; Laser beams; Laser mode locking; Particle beams; Power lasers; Radio frequency; Resonance; Testing;
