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Title: Instability-driven electromagnetic fields in coronal plasmas

Abstract

Filamentary electromagnetic fields previously observed in the coronae of laser-driven spherical targets [F. H. S eguin et al., Phys. Plasma. 19, 012701 (2012)] have been further investigated in laser irradiated plastic foils. Face-on proton-radiography provides an axial view of these filaments and shows coherent cellular structure regardless of initial foil-surface conditions. The observed cellular fields are shown to have an approximately constant scale size of 210 lm throughout the plasma evolution. A discussion of possible field-generation mechanisms is provided and it is demonstrated that the likely source of the cellular field structure is the magnetothermal instability. Using predicted temperature and density profiles, the fastest growing modes of this instability were found to be slowly varying in time and consistent with the observed cellular size.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1172366
Grant/Contract Number:  
NA0002035
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Manuel, M. J.-E., Li, C. K., Seguin, F. H., Sinenian, N., Frenje, J. A., Casey, D. T., Petrasso, R. D., Hager, J. D., Betti, R., Hu, S. X., Delettrez, J., and Meyerhofer, D. D. Instability-driven electromagnetic fields in coronal plasmas. United States: N. p., 2013. Web. doi:10.1063/1.4801515.
Manuel, M. J.-E., Li, C. K., Seguin, F. H., Sinenian, N., Frenje, J. A., Casey, D. T., Petrasso, R. D., Hager, J. D., Betti, R., Hu, S. X., Delettrez, J., & Meyerhofer, D. D. Instability-driven electromagnetic fields in coronal plasmas. United States. doi:10.1063/1.4801515.
Manuel, M. J.-E., Li, C. K., Seguin, F. H., Sinenian, N., Frenje, J. A., Casey, D. T., Petrasso, R. D., Hager, J. D., Betti, R., Hu, S. X., Delettrez, J., and Meyerhofer, D. D. Mon . "Instability-driven electromagnetic fields in coronal plasmas". United States. doi:10.1063/1.4801515. https://www.osti.gov/servlets/purl/1172366.
@article{osti_1172366,
title = {Instability-driven electromagnetic fields in coronal plasmas},
author = {Manuel, M. J.-E. and Li, C. K. and Seguin, F. H. and Sinenian, N. and Frenje, J. A. and Casey, D. T. and Petrasso, R. D. and Hager, J. D. and Betti, R. and Hu, S. X. and Delettrez, J. and Meyerhofer, D. D.},
abstractNote = {Filamentary electromagnetic fields previously observed in the coronae of laser-driven spherical targets [F. H. S eguin et al., Phys. Plasma. 19, 012701 (2012)] have been further investigated in laser irradiated plastic foils. Face-on proton-radiography provides an axial view of these filaments and shows coherent cellular structure regardless of initial foil-surface conditions. The observed cellular fields are shown to have an approximately constant scale size of 210 lm throughout the plasma evolution. A discussion of possible field-generation mechanisms is provided and it is demonstrated that the likely source of the cellular field structure is the magnetothermal instability. Using predicted temperature and density profiles, the fastest growing modes of this instability were found to be slowly varying in time and consistent with the observed cellular size.},
doi = {10.1063/1.4801515},
journal = {Physics of Plasmas},
number = 5,
volume = 20,
place = {United States},
year = {2013},
month = {4}
}

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