Measurement of Charged-Particle Stopping in Warm Dense Plasma

被引：128

作者：

Zylstra, A. B. ^{[1
]}

Frenje, J. A. ^{[1
]}

Grabowski, P. E. ^{[2
]}

Li, C. K. ^{[1
]}

Collins, G. W. ^{[3
]}

Fitzsimmons, P. ^{[4
]}

Glenzer, S. ^{[5
]}

Graziani, F. ^{[3
]}

Hansen, S. B. ^{[6
]}

Hu, S. X. ^{[7
]}

Johnson, M. Gatu ^{[1
]}

Keiter, P. ^{[8
]}

Reynolds, H. ^{[4
]}

Rygg, J. R. ^{[3
]}

Seguin, F. H. ^{[1
]}

Petrasso, R. D. ^{[1
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[2] Univ Calif Irvine, Irvine, CA 92697 USA

[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[4] Gen Atom, San Diego, CA 92186 USA

[5] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[6] Sandia Natl Labs, Albuquerque, NM 87185 USA

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

[8] Univ Michigan, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 21期

基金：

美国国家科学基金会;

关键词：

INERTIAL-CONFINEMENT-FUSION; LASER-PRODUCED PLASMAS; NATIONAL IGNITION FACILITY; ENERGY-LOSS; HEAVY-IONS; MATTER; SCATTERING; VELOCITY; TARGET; GAIN;

D O I：

10.1103/PhysRevLett.114.215002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measured the stopping of energetic protons in an isochorically heated solid-density Be plasma with an electron temperature of similar to 32 eV, corresponding to moderately coupled [(e(2)/a)/(k(B)T(e) + E-F) similar to 0.3] and moderately degenerate [k(B)T(e)/E-F similar to 2] "warm-dense matter" (WDM) conditions. We present the first high-accuracy measurements of charged-particle energy loss through dense plasma, which shows an increased loss relative to cold matter, consistent with a reduced mean ionization potential. The data agree with stopping models based on an ad hoc treatment of free and bound electrons, as well as the average-atom local-density approximation; this work is the first test of these theories in WDM plasma.

引用

页数：6

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