Laser system for a high duty cycle photoinjector

We have developed a solid-state laser system that produces a 1 MHz pulse train of 800 equal amplitude pulses with 25 μJ per pulse at λ=1054 nm ; the repetition rate is 1 Hz. The laser pulse train is produced by a mode-locked Nd:YLF oscillator, synchronized to the phase of the photoinjector RF. The p...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 1999-07, Vol.430 (2), p.180-188
Main Authors: Fry, A.R., Fitch, M.J., Melissinos, A.C., Taylor, B.D.
Format: Article
Language:English
Subjects:
Laser photoinjector
RF gun
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Summary:We have developed a solid-state laser system that produces a 1 MHz pulse train of 800 equal amplitude pulses with 25 μJ per pulse at λ=1054 nm ; the repetition rate is 1 Hz. The laser pulse train is produced by a mode-locked Nd:YLF oscillator, synchronized to the phase of the photoinjector RF. The pulses are amplified in a Nd : glass multipass amplifier followed by a two-pass amplifier. The laser system uses chirped pulse amplification to produce 2 ps pulses. After two stages of second harmonic generation to λ=263 nm and transport losses, 5 μJ per pulse of UV are available at the Cs 2Te photocathode of the RF gun. The photocathode quantum efficiency is in the 2–6% range, and electron bunches with charge in excess of 10 nC have been extracted during photoinjector operation.
ISSN:0168-9002
1872-9576
DOI:10.1016/S0168-9002(99)00223-5