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Title: Measuring E and B Fields in Laser-Produced Plasmas with Monoenergetic Proton Radiography

Abstract

Electromagnetic (E/B) fields generated by the interaction with plasmas of long-pulse, low-intensity laser beams relevant to inertial confinement fusion have been measured for the first time using novel monoenergetic proton radiography methods. High-resolution, time-gated radiography images of a plastic foil driven by a 10{sup 14} W/cm{sup 2} laser implied B fields of {approx}0.5 MG and E fields of {approx}1.5x10{sup 8} V/m. Simulations of these experiments with LASNEX+LSP have been performed and are in overall (though not exact) agreement with the data both for field strengths and for spatial distributions; this is the first direct experimental test of the laser-generated B-field package in LASNEX. The experiments also demonstrated that laser phase plates substantially reduce medium-scale chaotic field structure.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
20860880
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 97; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevLett.97.135003; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM-PLASMA SYSTEMS; CHAOS THEORY; FOILS; INERTIAL CONFINEMENT; LASER-PRODUCED PLASMA; LASERS; PROTON RADIOGRAPHY; RESOLUTION; SIMULATION; SPATIAL DISTRIBUTION

Citation Formats

Li, C K, Seguin, F H, Frenje, J A, Rygg, J R, Petrasso, R D, Town, R P. J., Amendt, P A, Hatchett, S P, Landen, O L, Mackinnon, A J, Patel, P K, Smalyuk, V A, Sangster, T C, Knauer, J P, Lawrence Livermore National Laboratory, Livermore, California 94550, and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623. Measuring E and B Fields in Laser-Produced Plasmas with Monoenergetic Proton Radiography. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.97.135003.
Li, C K, Seguin, F H, Frenje, J A, Rygg, J R, Petrasso, R D, Town, R P. J., Amendt, P A, Hatchett, S P, Landen, O L, Mackinnon, A J, Patel, P K, Smalyuk, V A, Sangster, T C, Knauer, J P, Lawrence Livermore National Laboratory, Livermore, California 94550, & Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623. Measuring E and B Fields in Laser-Produced Plasmas with Monoenergetic Proton Radiography. United States. doi:10.1103/PHYSREVLETT.97.135003.
Li, C K, Seguin, F H, Frenje, J A, Rygg, J R, Petrasso, R D, Town, R P. J., Amendt, P A, Hatchett, S P, Landen, O L, Mackinnon, A J, Patel, P K, Smalyuk, V A, Sangster, T C, Knauer, J P, Lawrence Livermore National Laboratory, Livermore, California 94550, and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623. Fri . "Measuring E and B Fields in Laser-Produced Plasmas with Monoenergetic Proton Radiography". United States. doi:10.1103/PHYSREVLETT.97.135003.
@article{osti_20860880,
title = {Measuring E and B Fields in Laser-Produced Plasmas with Monoenergetic Proton Radiography},
author = {Li, C K and Seguin, F H and Frenje, J A and Rygg, J R and Petrasso, R D and Town, R P. J. and Amendt, P A and Hatchett, S P and Landen, O L and Mackinnon, A J and Patel, P K and Smalyuk, V A and Sangster, T C and Knauer, J P and Lawrence Livermore National Laboratory, Livermore, California 94550 and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623},
abstractNote = {Electromagnetic (E/B) fields generated by the interaction with plasmas of long-pulse, low-intensity laser beams relevant to inertial confinement fusion have been measured for the first time using novel monoenergetic proton radiography methods. High-resolution, time-gated radiography images of a plastic foil driven by a 10{sup 14} W/cm{sup 2} laser implied B fields of {approx}0.5 MG and E fields of {approx}1.5x10{sup 8} V/m. Simulations of these experiments with LASNEX+LSP have been performed and are in overall (though not exact) agreement with the data both for field strengths and for spatial distributions; this is the first direct experimental test of the laser-generated B-field package in LASNEX. The experiments also demonstrated that laser phase plates substantially reduce medium-scale chaotic field structure.},
doi = {10.1103/PHYSREVLETT.97.135003},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 13,
volume = 97,
place = {United States},
year = {2006},
month = {9}
}