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

Journal Article · Fri Sep 29 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.135003· OSTI ID:20860880

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 ^[1]

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1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

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.

• OSTI ID: 20860880
• Journal Information: Physical Review Letters, Vol. 97, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.97.135003; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
CHAOS THEORY
FOILS
INERTIAL CONFINEMENT
LASER-PRODUCED PLASMA
LASERS
PROTON RADIOGRAPHY
RESOLUTION
SIMULATION
SPATIAL DISTRIBUTION