Synchronization and Characterization of an Ultra-Short Laser for   Photoemission and Electron-Beam Diagnostics Studies at a Radio Frequency   Photoinjector
  A commercially-available titanium-sapphire laser system has recently been installed at the Fermilab A0 photoinjector laboratory in support of photoemission and electron beam diagnostics studies. The laser system is synchronized to both the 1.3-GHz master oscillator and a 1-Hz signal use to trigger the radiofrequency system and instrumentation acquisition. The synchronization scheme and performance are detailed. Long-term temporal and intensity drifts are identified and actively suppressed to within 1 ps and 1.5%, respectively. Measurement and optimization of the laser's temporal profile are accomplished using frequency-resolved optical gating. 
Timothy Maxwell, Jinhao Ruan, Philippe Piot, Alex Lumpkin
physics.acc-ph