Laser system for a high duty cycle photoinjector

Low Emittance Electron Beam Studies

“…Although the rising part of the pulse train is very fast and sharp, the decay is somewhat slow and the amplitude of the last 80 pulses is reduced. To achieve a flat top long train, a pre-shaping Pockels cell can be inserted in the seed pulse line before the multi-pass amplifier so that the seed pulse train is shaped such that the losses in the amplification process are exactly compensated [21].…”

“…The first version of the drive laser was installed in 1998 [21] and has been in operation since then, but was limited in certain aspects. Most seriously, the bandwidth of the seed pulse, which was generated in a 2 km long fiber, was unstable due to environmental fluctuations.…”

Remote Operation of the Fermilab/NICADD Photoinjector

“…The CsTe cathode of the electron gun is illuminated by UV from a laser which is itself a research instrument [4]. It was not designed with remote adjustment in mind, and its performance is very sensitive to local conditions not easily monitored because of the complexity of the system.…”

Stability analysis of the laser system for the TTF photoinjector at Fermilab

“…[1,2] Besides the production of high charges, high brightness electron beams, the need for high bunch charge stability requires that each laser pulse in the pulse train must have the same energy, and the energy per laser pulse should not vary significantly from shot to shot. This motivates the stability analysis of the laser system for the TTF photoinjector.…”