Partition of Omega-like facility into two configurations of 24 and 36 laser beams to improve implosion performance

被引：3

作者：

Temporal, M. ^{[1
,2
]}

Piriz, A. R. ^{[1
,2
]}

Canaud, B. ^{[3
,4
]}

Ramis, R. ^{[5
]}

Craxton, R. S. ^{[6
]}

机构：

[1] Univ Castilla La Mancha, Inst Invest Energet INEI, ETSII, Ciudad Real 13071, Spain

[2] Univ Castilla La Mancha, CYTEMA, Ciudad Real 13071, Spain

[3] CEA, DAM, DIF, F-91297 Arpajon, France

[4] Univ Paris Saclay, CEA, LMCE, F-91680 Bruyeres Le Chatel, France

[5] Univ Politecn Madrid, ETSI Aeronaut Espacio, Madrid 28040, Spain

[6] Univ Rochester, Lab Laser Energet, Rochester, NY 14623 USA

来源：

SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期

关键词：

INERTIAL CONFINEMENT FUSION; TARGET; IRRADIATION; IGNITION; DRIVEN; COMPRESSION; UNIFORMITY; ELECTRON; SPOT;

D O I：

10.1038/s41598-023-37174-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An Omega-like beam configuration is considered where the 60-beam layout can be separated into two independent sub-configurations with 24 and 36 laser beams, each minimizing direct drive illumination non-uniformity. Two different laser focal spot profiles, one associated with each configuration, are proposed to apply the zooming technique in order to increase the laser-target coupling efficiency. This approach is used by 1D hydrodynamics simulations of the implosion of a direct-drive capsule characterized by a relatively large aspect ratio A=7 and an optimized laser pulse shape delivering a maximum of 30 TW and 30 kJ, with different temporal pulse shapes in each of the two sets of beams. It is shown that zooming allows for an optimistic 1D thermonuclear energy gain greater than one while without zooming the thermonuclear gain remains largely below one. While this is incompatible with the as-built Omega laser, it provides a promising option for a future intermediate-energy direct drive laser system.

引用

页数：11

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