Thermal recovery of LMJ amplifiers

Ph. Arnoux; Geoffroy LeTouze; J. P. Caltagirone; A. Viguie; B. Bicrel; Eric Grebot; Stephane E. Seznec; Christopher D. Marshall; Luis E. Zapata

doi:10.1117/12.354179

23 July 1999 Thermal recovery of LMJ amplifiers

Ph. Arnoux, Geoffroy LeTouze, J. P. Caltagirone, A. Viguie, B. Bicrel, Eric Grebot, Stephane E. Seznec, Christopher D. Marshall, Luis E. Zapata

Author Affiliations +

Proceedings Volume 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion; (1999) https://doi.org/10.1117/12.354179
Event: Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 1998, Monterey, CA, United States

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.

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Ph. Arnoux, Geoffroy LeTouze, J. P. Caltagirone, A. Viguie, B. Bicrel, Eric Grebot, Stephane E. Seznec, Christopher D. Marshall, and Luis E. Zapata "Thermal recovery of LMJ amplifiers", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); https://doi.org/10.1117/12.354179

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