Irradiation uniformity and zooming performances for a capsule directly driven by a 32x9 laser beams configuration

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3309489· OSTI ID:21347124

Temporal, M ^[1]; Canaud, B ^[2]; Le Garrec, B J ^[3]

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1. ETSIA, Universidad Politecnica de Madrid, 28040 Madrid (Spain)
2. CEA, DAM, DIF, Bruyeres-le-Chatel, F-91297 Arpajon (France)
3. CEA-CESTA, 15 avenue des Sablieres, BP2, 33114 Le Barp (France)

An inertial confinement fusion capsule directly driven by laser beams has been considered. A ray-tracing package is used to evaluate the uniformity of the energy deposition and the absorption efficiency provided by the direct irradiation of the capsule. Two distinct configurations with a single laser beam or a bundle of nine laser beams associated to 32 directions of irradiation are considered. Assuming a beam-to-beam power imbalance of 5% and a super-Gaussian spatial profile of the beams intensity, is found that the configuration using the bundles provides better irradiation uniformity. The laser beams of each bundle have been divided in two groups of four and five beams with associated different focal spots in order to increase the laser-capsule coupling efficiency. A configuration saving 16% of the laser energy and limiting the irradiation nonuniformity to less than 1% has been individuated.

• OSTI ID: 21347124
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
BEAMS
CAPSULES
CONFINEMENT
CONTAINERS
INERTIAL CONFINEMENT
LASERS
PHOTON BEAMS
PLASMA CONFINEMENT
SORPTION