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Title: Precision mapping of laser-driven magnetic fields and their evolution in high-energy-density plasmas

Abstract

The magnetic fields generated at the surface of a laser-irradiated planar solid target are mapped using ultrafast proton radiography. Thick (50 μm) plastic foils are irradiated with 4-kJ, 2.5-ns laser pulses focused to an intensity of 4 x 10¹⁴ W/cm². The data show magnetic fields concentrated at the edge of the laser-focal region, well within the expanding coronal plasma. The magnetic-field spatial distribution is tracked and shows good agreement with 2D resistive magnetohydrodynamic simulations using the code DRACO when the Biermann battery source, fluid and Nernst advection, resistive magnetic diffusion, and Righi-Leduc heat flow are included.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
  2. Imperial College, London (United Kingdom)
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1186085
DOE Contract Number:  
NA0001944
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 21; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Gao, L., Nilson, P. M., Igumenshchev, I. V., Haines, M. G., Froula, D. H., Betti, R., and Meyerhofer, D. D.. Precision mapping of laser-driven magnetic fields and their evolution in high-energy-density plasmas. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.215003.
Gao, L., Nilson, P. M., Igumenshchev, I. V., Haines, M. G., Froula, D. H., Betti, R., & Meyerhofer, D. D.. Precision mapping of laser-driven magnetic fields and their evolution in high-energy-density plasmas. United States. doi:10.1103/PhysRevLett.114.215003.
Gao, L., Nilson, P. M., Igumenshchev, I. V., Haines, M. G., Froula, D. H., Betti, R., and Meyerhofer, D. D.. Fri . "Precision mapping of laser-driven magnetic fields and their evolution in high-energy-density plasmas". United States. doi:10.1103/PhysRevLett.114.215003.
@article{osti_1186085,
title = {Precision mapping of laser-driven magnetic fields and their evolution in high-energy-density plasmas},
author = {Gao, L. and Nilson, P. M. and Igumenshchev, I. V. and Haines, M. G. and Froula, D. H. and Betti, R. and Meyerhofer, D. D.},
abstractNote = {The magnetic fields generated at the surface of a laser-irradiated planar solid target are mapped using ultrafast proton radiography. Thick (50 μm) plastic foils are irradiated with 4-kJ, 2.5-ns laser pulses focused to an intensity of 4 x 10¹⁴ W/cm². The data show magnetic fields concentrated at the edge of the laser-focal region, well within the expanding coronal plasma. The magnetic-field spatial distribution is tracked and shows good agreement with 2D resistive magnetohydrodynamic simulations using the code DRACO when the Biermann battery source, fluid and Nernst advection, resistive magnetic diffusion, and Righi-Leduc heat flow are included.},
doi = {10.1103/PhysRevLett.114.215003},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 21,
volume = 114,
place = {United States},
year = {2015},
month = {5}
}