Self-generated magnetic fields in direct-drive implosion experiments

被引：40

作者：

Igumenshchev, I. V. ^{[1
]}

Zylstra, A. B. ^{[2
]}

Li, C. K. ^{[2
]}

Nilson, P. M. ^{[1
]}

Goncharov, V. N. ^{[1
]}

Petrasso, R. D. ^{[2
]}

机构：

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

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

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 06期

关键词：

PROTON RADIOGRAPHY; LASER; TRANSPORT;

D O I：

10.1063/1.4883226

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：

Electric and self-generated magnetic fields in direct-drive implosion experiments on the OMEGA Laser Facility were investigated employing radiography with similar to 10- to 60-MeV protons. The experiment used plastic-shell targets with imposed surface defects (glue spots, wires, and mount stalks), which enhance self-generated fields. The fields were measured during the 1-ns laser drive with an on-target intensity similar to 10(15) W/cm(2). Proton radiographs show multiple ring-like structures produced by electric fields similar to 10(7) V/cm and fine structures from surface defects, indicating self-generated fields up to similar to 3 MG. These electric and magnetic fields show good agreement with two-dimensional magnetohydrodynamic simulations when the latter include the del T-e x del n(e) source, Nernst convection, and anisotropic resistivity. The simulations predict that self-generated fields affect heat fluxes in the conduction zone and, through this, affect the growth of local perturbations. (C) 2014 AIP Publishing LLC.

引用

页数：10

共 40 条

[1]

[Anonymous], 2004, International Series of Monographs on Physics.

[2]

ASKARYAN GA, 1967, JETP LETT-USSR, V5, P93

[3] Reduction of laser imprinting using polarization smoothing on a solid-state fusion laser [J].

Boehly, TR ;

Smalyuk, VA ;

Meyerhofer, DD ;

Knauer, JP ;

Bradley, DK ;

Craxton, RS ;

Guardalben, MJ ;

Skupsky, S ;

Kessler, TJ .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (07) :3444-3447

[4] Initial performance results of the OMEGA laser system [J].

Boehly, TR ;

Brown, DL ;

Craxton, RS ;

Keck, RL ;

Knauer, JP ;

Kelly, JH ;

Kessler, TJ ;

Kumpan, SA ;

Loucks, SJ ;

Letzring, SA ;

Marshall, FJ ;

McCrory, RL ;

Morse, SFB ;

Seka, W ;

Soures, JM ;

Verdon, CP .

OPTICS COMMUNICATIONS, 1997, 133 (1-6) :495-506

[5] Laser-produced protons and their application as a particle probe [J].

Borghesi, M ;

Campbell, DH ;

Schiavi, A ;

Willi, O ;

Mackinnon, AJ ;

Hicks, D ;

Patel, P ;

Gizzi, LA ;

Galimberti, M ;

Clarke, RJ .

LASER AND PARTICLE BEAMS, 2002, 20 (02) :269-275

[6]

Braginskii S. I., 1965, REV PLASMA PHYS, V1

[7] Measurements of energetic proton transport through magnetized plasma from intense laser interactions with solids [J].

Clark, EL ;

Krushelnick, K ;

Davies, JR ;

Zepf, M ;

Tatarakis, M ;

Beg, FN ;

Machacek, A ;

Norreys, PA ;

Santala, MIK ;

Watts, I ;

Dangor, AE .

PHYSICAL REVIEW LETTERS, 2000, 84 (04) :670-673

[8]

Dolginov A. Z., 1979, Sov. Phys.-JETP, V50, P912

[9] Observation of Self-Similarity in the Magnetic Fields Generated by the Ablative Nonlinear Rayleigh-Taylor Instability [J].

Gao, L. ;

Nilson, P. M. ;

Igumenschev, I. V. ;

Fiksel, G. ;

Yan, R. ;

Davies, J. R. ;

Martinez, D. ;

Smalyuk, V. ;

Haines, M. G. ;

Blackman, E. G. ;

Froula, D. H. ;

Betti, R. ;

Meyerhofer, D. D. .

PHYSICAL REVIEW LETTERS, 2013, 110 (18)

[10] Magnetic Field Generation by the Rayleigh-Taylor Instability in Laser-Driven Planar Plastic Targets [J].

Gao, L. ;

Nilson, P. M. ;

Igumenschev, I. V. ;

Hu, S. X. ;

Davies, J. R. ;

Stoeckl, C. ;

Haines, M. G. ;

Froula, D. H. ;

Betti, R. ;

Meyerhofer, D. D. .

PHYSICAL REVIEW LETTERS, 2012, 109 (11)

← 1 2 3 4 →