Supra-thermal electron beam stopping power and guiding in dense plasmas

被引：8

作者：

Santos, Joao Jorge ^{[1
]}

Batani, D. ^{[1
]}

Baton, S. D. ^{[2
]}

Beg, F. N. ^{[3
]}

Ceccotti, T. ^{[4
]}

Debayle, A. ^{[5
]}

Dorchies, F. ^{[1
]}

Feugeas, J. -L. ^{[1
]}

Fourment, C. ^{[1
]}

Gremillet, L. ^{[6
]}

Honrubia, J. J. ^{[5
]}

Hulin, S. ^{[1
]}

Morace, A. ^{[7
]}

Nicolai, P.

Perez, F. ^{[2
]}

Sawada, H. ^{[3
]}

Schlenvoigt, H. -P. ^{[2
]}

Tikhonchuk, V. T. ^{[1
]}

Eau, X. Vai S. S. ^{[1
]}

Vauzour, B. ^{[1
]}

We, M. ^{[8
]}

机构：

[1] Univ Bordeaux, CELIA Ctr Lasers Intenses & Applicat, CEA, CNRS,UMR 5107, F-33405 Talence, France

[2] Ecole Polytech CNRS CEA UPMC, LULI, F-91128 Palaiseau, France

[3] Univ Calif San Diego, La Jolla, CA 92093 USA

[4] CEA, SPAM, IRAMIS, F-91191 Gif Sur Yvette, France

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

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

[7] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy

[8] Gen Atom Co, San Diego, CA 92121 USA

来源：

JOURNAL OF PLASMA PHYSICS | 2013年 / 79卷

关键词：

INERTIAL FUSION; FAST IGNITION; PARTICLES; TRANSPORT;

D O I：

10.1017/S0022377813000305

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Fast-electron beam stopping mechanisms in media ranging from solid to warm dense matter have been investigated experimentally and numerically. Laser-driven fast electrons have been transported through solid Al targets and shock-compressed Al and plastic foam targets. Their propagation has been diagnosed via rear-side optical self-emission and K-alpha X-rays from tracer layers. Comparison between measurements and simulations shows that the transition from collision-dominated to resistive field-dominated energy loss occurs for a fast-electron current density similar to 5 x 10(11) A cm(-2). The respective increases in the stopping power with target density and resistivity have been detected in each regime. Self-guided propagation over 200 mu m has been observed in radially compressed targets due to similar to 1 kT magnetic fields generated by resistivity gradients at the converging shock front.

引用

页码：429 / 435

页数：7