12 April 1996 Alternative approaches to the laser target design for fusion-fission reactor
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Abstract
It is necessary to reach large gains in laser target (G) to get useful energy in a fusion reactor. Using the fission blanket in a reactor allows one to increase the energy gain. The first Russian projects of laser fission-fusion reactor were studied. It was suggested to use a two-cascade hybrid reactor scheme, allowing one to reach gain in fission blanket more than 1000. As a result it will be possible to use laser target with G on the order of 0.1 - 1 in such type of a reactor. It was suggested to target the design for the 'ignition' experiment at the laser energy 0.1 - 0.3 MJ. It was a high aspect ratio cryogenic direct driven target. But it is necessary to use a lot of laser beams around the target to provide spherical symmetry of laser irradiation. Large surface 'will be lost' for fission blanket. In addition the laser pulse should have a sharp time profile. It is necessary to use about five-to-ten times more laser energy to get 'ignition' in indirect driven target. The new target design, named 'Greenhouse target,' was suggested. It is a very important problem to compensate the negative influence of holes on compression symmetry. It was suggested to use the target with 'relief' to compensate this effect. This target design is studied now. We are studying four alterative approaches to the laser target design for hybrid reactor: (1) the target with inner laser energy input; (2) high aspect ratio target for laser with pulse duration about 100 ns; (3) conic target; (4) exploding pusher spherical or conic targets for carbon-dioxide laser. The numerical simulations were made by using Lagrange code 'ATLANT'.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
L. P. Feoktistov, L. P. Feoktistov, Ivan G. Lebo, Ivan G. Lebo, Vladislav B. Rozanov, Vladislav B. Rozanov, V. F. Tishkin, V. F. Tishkin, } "Alternative approaches to the laser target design for fusion-fission reactor", Proc. SPIE 2770, Laser Optics '95 and ICONO '95: Superintense Laser Fields, (12 April 1996); doi: 10.1117/12.238037; https://doi.org/10.1117/12.238037
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