High efficiency gratings for beam steering on the National Ignition Facility (NIF) laser

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Description

The design of the National Ignition Facility (NIF) is based on conversion of 1.05 {mu}m wavelength light (1{omega}) into third harmonic light (3{omega}) by passage through KDP frequency conversion crystals. It is important for proper coupling of radiation into the targets that the final beam impinging upon the target should have little 1{omega} or 2{omega} light. It is also desirable to avoid direct line-of sight for neutrons between the target and the KDP crystals, in order to prevent damage. These issues can be overcome by employing diffraction gratings immediately before the final NIF focusing lens to direct the 3{omega} beam ... continued below

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12 p.

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Perry, M.D.; Dixit, S.N.; Shore, B.W.; Boyd, R.D.; Britten, J.A. & Powell, H.T. May 26, 1995.

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Description

The design of the National Ignition Facility (NIF) is based on conversion of 1.05 {mu}m wavelength light (1{omega}) into third harmonic light (3{omega}) by passage through KDP frequency conversion crystals. It is important for proper coupling of radiation into the targets that the final beam impinging upon the target should have little 1{omega} or 2{omega} light. It is also desirable to avoid direct line-of sight for neutrons between the target and the KDP crystals, in order to prevent damage. These issues can be overcome by employing diffraction gratings immediately before the final NIF focusing lens to direct the 3{omega} beam to the target. A single grating design is highly dispersive, and may introduce intolerable divergence into the beam. In order to overcome this limitation, we propose to use a grating pair. This will provide transverse offset of the beam and eliminate the dispersion while offering several other advantages.

Physical Description

12 p.

Notes

OSTI as DE95016630

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  • 1. annual solid-state lasers for application to inertial confinement fusion meeting, Monterey, CA (United States), 30 May - 2 Jun 1995

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  • Other: DE95016630
  • Report No.: UCRL-JC--120185
  • Report No.: CONF-9505264--3
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 106434
  • Archival Resource Key: ark:/67531/metadc619390

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  • May 26, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 18, 2016, 5:26 p.m.

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Perry, M.D.; Dixit, S.N.; Shore, B.W.; Boyd, R.D.; Britten, J.A. & Powell, H.T. High efficiency gratings for beam steering on the National Ignition Facility (NIF) laser, article, May 26, 1995; California. (digital.library.unt.edu/ark:/67531/metadc619390/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.