Observation of Ultrafast Nonequilibrium Collective Dynamics in Warm Dense Hydrogen

被引：96

作者：

Faeustlin, R. R. ^{[1
]}

Bornath, Th. ^{[2
]}

Doeppner, T. ^{[3
]}

Duesterer, S. ^{[1
]}

Foerster, E. ^{[4
]}

Fortmann, C. ^{[5
]}

Glenzer, S. H. ^{[3
]}

Goede, S. ^{[2
]}

Gregori, G. ^{[6
]}

Irsig, R. ^{[2
]}

Laarmann, T. ^{[1
]}

Lee, H. J. ^{[7
]}

Li, B. ^{[8
]}

Meiwes-Broer, K. -H. ^{[2
]}

Mithen, J. ^{[6
]}

Nagler, B. ^{[6
]}

Przystawik, A. ^{[2
]}

Redlin, H. ^{[1
]}

Redmer, R. ^{[2
]}

Reinholz, H. ^{[2
]}

Roepke, G. ^{[2
]}

Tavella, F. ^{[1
]}

Thiele, R. ^{[2
]}

Tiggesbaeumker, J. ^{[2
]}

Toleikis, S. ^{[1
]}

Uschmann, I. ^{[4
]}

Vinko, S. M. ^{[6
]}

Whitcher, T. ^{[6
]}

Zastrau, U. ^{[4
]}

Ziaja, B. ^{[9
,10
]}

Tschentscher, Th. ^{[11
]}

机构：

[1] DESY, D-22607 Hamburg, Germany

[2] Univ Rostock, Inst Phys, D-18051 Rostock, Germany

[3] Lawrence Livermore Natl Lab, L 399, Livermore, CA 94551 USA

[4] Univ Jena, IOQ, D-07743 Jena, Germany

[5] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[6] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

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

[8] Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England

[9] CFEL, D-22607 Hamburg, Germany

[10] Inst Nucl Phys, PL-31342 Krakow, Poland

[11] European XFEL GmbH, D-22761 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 12期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会;

关键词：

RAY THOMSON SCATTERING; FREE-ELECTRON-LASER; EXTREME-ULTRAVIOLET; PLASMAS; PHOTOABSORPTION; RADIATION; WATER;

D O I：

10.1103/PhysRevLett.104.125002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate ultrafast (fs) electron dynamics in a liquid hydrogen sample, isochorically and volumetrically heated to a moderately coupled plasma state. Thomson scattering measurements using 91.8 eV photons from the free-electron laser in Hamburg (FLASH at DESY) show that the hydrogen plasma has been driven to a nonthermal state with an electron temperature of 13 eV and an ion temperature below 0.1 eV, while the free-electron density is 2: 8 x 10(20) cm(-3). For dense plasmas, our experimental data strongly support a nonequilibrium kinetics model that uses impact ionization cross sections based on classical free-electron collisions.

引用

页数：4

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