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Proceedings Paper

Thermal recovery of LMJ amplifiers
Author(s): Ph. Arnoux; Geoffroy LeTouze; J. P. Caltagirone; A. Viguie; B. Bicrel; Eric Grebot; Stephane E. Seznec; Christopher D. Marshall; Luis E. Zapata
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Paper Abstract

LMJ/NIF shot rate is limited by thermal recovery of laser slabs and beamtubes. Most of the electrical energy input is dissipated thermally in the amplifiers. Wall-plug efficiency is around 1 percent. Wavefront distortion due to non uniform heat deposition or thermal gradient in gases can only be corrected in the limits of the adaptive optics. Laser focusing requirements thus dictate a maximum chain aberration which can be expressed in wavefront distortion per slab per pass and lead to thermal recovery requirements. Aberrations are analyzed in terms of residual temperature differences in slabs and gas columns of amplifier cavities and beamtubes, and of wavefront distortions.

Paper Details

Date Published: 23 July 1999
PDF: 5 pages
Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); doi: 10.1117/12.354179
Show Author Affiliations
Ph. Arnoux, Ctr. d'Etudes de CESTA/CEA (France)
Geoffroy LeTouze, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
J. P. Caltagirone, ENSPCB (France)
A. Viguie, CISI (France)
B. Bicrel, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Eric Grebot, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Stephane E. Seznec, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Christopher D. Marshall, Lawrence Livermore National Lab. (United States)
Luis E. Zapata, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 3492:
Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion
W. Howard Lowdermilk, Editor(s)

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