Fast optical shutters for Nova, a high power fusion laser

Details Fast optical shutters for Nova, a high power fusion laser Fast optical shutters for Nova, a high power fusion laser

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977frp..sympu....b&link_type=abstract

Presented at the 7th Symp. on Fusion Res. Proj., Knoxville, Tenn., 25 Oct. 1977

Computer Science

Performance

Laser Fusion, Lasers, Louvers, Blinds, Laser Outputs, Shutters

Scientific paper

Preliminary design and performance test results for fast optical shutters intended for use in the Nova high power fusion laser system are briefly described. Both an opening shutter to protect the pellet target from amplified spontaneous emission (ASE), and a closing shutter to protect the laser from light reflected back from the target are discussed. Faraday rotators, synchronized by a 400 Hz oscillator, provide an opening shutter mechanism with an opening time of approximately 10 microseconds. A plasma closing shutter, employing electrical sublimation of a foil, provide a shutter closing time of 70 ns + -20 ns. Energy for foil sublimation is provided by discharge of a 42 J capacitor bank. Implementation of these shutter techniques in the Nova system is anticipated to improve laser output power and efficiency.

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