Performance of the beamlet laser, a testbed for the National Ignition Facility

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We present initial performance studies for Beamlet, a single-beam prototype for megajoule-class neodymium-glass laser fusion drivers using a multipass main amplifier, adaptive optics, and efficient, high-fluence conversion to the third harmonic. The Beamlet final amplifier uses Brewsters-angle glass slabs with a square 39 {times} 39 cm{sup 2} aperture and a full-aperture plasma-electrode Pockels cell switch. The laser has been tested at the fundamental wavelength over a range of pulselengths from 1-10 ns up to energies of 5.8 kJ at 10 ns and 17.3 kJ at 10 ns at a beam area of 35 {times} 35 cm{sup 2}. A 39-actuator deformable ... continued below

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8 p.

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van Wonterghem, B.M.; Caird, J.A.; Barker, C.E.; Campbell, J.H.; Murray, J.R. & Speck, D.R. June 19, 1995.

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Description

We present initial performance studies for Beamlet, a single-beam prototype for megajoule-class neodymium-glass laser fusion drivers using a multipass main amplifier, adaptive optics, and efficient, high-fluence conversion to the third harmonic. The Beamlet final amplifier uses Brewsters-angle glass slabs with a square 39 {times} 39 cm{sup 2} aperture and a full-aperture plasma-electrode Pockels cell switch. The laser has been tested at the fundamental wavelength over a range of pulselengths from 1-10 ns up to energies of 5.8 kJ at 10 ns and 17.3 kJ at 10 ns at a beam area of 35 {times} 35 cm{sup 2}. A 39-actuator deformable mirror system corrects the beam to a Strehl ratio of 0.4.

Physical Description

8 p.

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INIS; OSTI as DE95015904

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  • 15. international conference on coherent and nonlinear optics, St. Petersburg (Russian Federation), 27 Jun - 1 Jul 1995

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  • Other: DE95015904
  • Report No.: UCRL-JC--121272
  • Report No.: CONF-9506130--1
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 97196
  • Archival Resource Key: ark:/67531/metadc794222

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  • June 19, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 17, 2016, 3:19 p.m.

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van Wonterghem, B.M.; Caird, J.A.; Barker, C.E.; Campbell, J.H.; Murray, J.R. & Speck, D.R. Performance of the beamlet laser, a testbed for the National Ignition Facility, article, June 19, 1995; California. (digital.library.unt.edu/ark:/67531/metadc794222/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.