Pressure-driven, resistive magnetohydrodynamic interchange instabilities in laser-produced high-energy-density plasmas
Name
Li-2009-Pressure-driven, res.pdf
Size
899.52 KB
Format
Adobe PDF
Checksum (MD5)
2556e045f8141eac59459737666ed67f
Author(s)
Li, Chikang
Frenje, Johan A.
Petrasso, Richard D.
Seguin, Fredrick Hampton
Amendt, P. A.
Landen, O. L.
Town, R. P. J.
Betti, R.
Meyerhofer, D. D.
Soures, J. M.
Date Issued
July 2009
Journal
Physical Review E
Publisher
American Physical Society
Citation
Li, C. K. et al. “Pressure-driven, resistive magnetohydrodynamic interchange instabilities in laser-produced high-energy-density plasmas.” Physical Review E 80.1 (2009): 016407. © 2009 The American Physical Society.
Version
Final published version
Abstract
Recent experiments using proton backlighting of laser-foil interactions provide unique opportunities for studying magnetized plasma instabilities in laser-produced high-energy-density plasmas. Time-gated proton radiograph images indicate that the outer structure of a magnetic field entrained in a hemispherical plasma bubble becomes distinctly asymmetric after the laser turns off. It is shown that this asymmetry is a consequence of pressure-driven, resistive magnetohydrodynamic (MHD) interchange instabilities. In contrast to the predictions made by ideal MHD theory, the increasing plasma resistivity after laser turn-off allows for greater low-mode destabilization (m>1) from reduced stabilization by field-line bending. For laser-generated plasmas presented herein, a mode-number cutoff for stabilization of perturbations with m>∼[8πβ(1+D[subscript m]k⊥(2)γmax(−1))](1/2) is found in the linear growth regime. The growth is measured and is found to be in reasonable agreement with model predictions.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevE.80.016407
