Laser driver for a photocathode of an electron linear accelerator

Journal Article · Mon Jan 24 00:00:00 EST 2011 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2010V040N12ABEH014435· OSTI ID:21541819

Potemkin, A K; Gacheva, E I; Zelenogorskii, V V; Katin, E V; Kozhevatov, I E; Lozhkarev, V V; Luchinin, G A; Silin, D E; Khazanov, Efim A ^[1]; Trubnikov, D V; Shirkov, G D ^[2]; Kuriki, M ^[3]; Urakava, J ^[4]

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1. Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)
2. Joint Institute for Nuclear Research, Dubna, Moscow region (Russian Federation)
3. Hiroshima University, Higashi-Hiroshima, Hiroshima (Japan)
4. High Energy Accelerator Research Organisation, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)

A laser system is designed for operation with a photocathode electron gun for a linear accelerator with the following parameters of radiation at a wavelength of 262 nm (the fourth harmonic of a Nd:YLF laser). The pulse trains (macropulses) with a repetition rate of 5 Hz and a duration of 900 {mu}s consist of 8-ps micropulses with an energy of 1.4 {mu}J and a repetition rate of 2.708 MHz. This repetition rate is variable within {+-}32 kHz and is stabilised by an external signal with an accuracy of 10 Hz. Due to the use of a feedback-controlled acousto-optic modulator, the root-mean-square deviation of the micropulse energy in the first and second harmonics is 2.5% and 3.6%, respectively. Using the decaying branch of the dependence of the second-to-fourth harmonic conversion efficiency on the second harmonic intensity, we decreased the root-mean-square deviation of the energy of the fourth-harmonic micropulses to 2.3% at the first-to-fourth harmonic conversion efficiency of 27%. (lasers and amplifiers)

• OSTI ID: 21541819
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 40, Issue 12; Other Information: DOI: 10.1070/QE2010v040n12ABEH014435; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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LASER RADIATION
LINEAR ACCELERATORS
NEODYMIUM LASERS
PHOTOCATHODES
PULSES
WAVELENGTHS
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