Performance of the upgraded laser system for the Fermilab-NIU photoinjector

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The laser system for the Fermilab-NIU photoinjector [1] has been recently upgraded in order to improve reliability and to reduce amplitude fluctuations. Major modifications included the replacement of the oscillator by a diode-pumped passively mode locked Nd:YLF commercial laser [2]. The oscillator delivers 5 ps long pulses at 81.25 MHz at an average power of 450 mW. The number of round trips in the multi-pass amplifier was reduced by half and image relaying was introduced throughout the optical system. The frequency of the IR ({lambda} = 1053 nm) pulse was quadrupled to UV ({lambda} = 263.5 nm) by two BBO ... continued below

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36 pages

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Li, Jian-Liang; Tikhoplav, Rodion; Melissinos, Adrian C. & U., /Rochester February 1, 2006.

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Description

The laser system for the Fermilab-NIU photoinjector [1] has been recently upgraded in order to improve reliability and to reduce amplitude fluctuations. Major modifications included the replacement of the oscillator by a diode-pumped passively mode locked Nd:YLF commercial laser [2]. The oscillator delivers 5 ps long pulses at 81.25 MHz at an average power of 450 mW. The number of round trips in the multi-pass amplifier was reduced by half and image relaying was introduced throughout the optical system. The frequency of the IR ({lambda} = 1053 nm) pulse was quadrupled to UV ({lambda} = 263.5 nm) by two BBO crystals. The overall efficiency for frequency quadrupling was of order 20%. The shot to shot fluctuations in the UV are {approx} 5%. The UV energy on the cathode is 5 {micro}J/pulse (10{micro}J/pulse without the pulse stacker), yielding charge of 10 nC/pulse.

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36 pages

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  • Journal Name: Nucl.Instrum.Meth.A564:57-65,2006

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  • Report No.: FERMILAB-PUB-06-020-E
  • Grant Number: AC02-76CH03000
  • DOI: 10.1016/j.nima.2006.04.032 | External Link
  • Office of Scientific & Technical Information Report Number: 892443
  • Archival Resource Key: ark:/67531/metadc881870

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 30, 2016, 4:20 p.m.

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Li, Jian-Liang; Tikhoplav, Rodion; Melissinos, Adrian C. & U., /Rochester. Performance of the upgraded laser system for the Fermilab-NIU photoinjector, article, February 1, 2006; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc881870/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.