期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.215003
关键词
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资金
- Department of Energy National Nuclear Security Administration [DE-NA0001944]
- University of Rochester
- New York State Energy Research and Development Authority
- National Laser Users' Facility through Princeton University [DE-NA0002205]
The magnetic fields generated at the surface of a laser-irradiated planar solid target are mapped using ultrafast proton radiography. Thick (50 mu m) plastic foils are irradiated with 4-kJ, 2.5-ns laser pulses focused to an intensity of 4 x 10(14) W/cm(2). 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.
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