Froula D H, Ross J S, Pollock B B, Davis P, James A N, Divol L, Edwards M J, Offenberger A A, Price D, Town R P J, Tynan G R, Glenzer S H
L-399, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551, USA.
Phys Rev Lett. 2007 Mar 30;98(13):135001. doi: 10.1103/PhysRevLett.98.135001. Epub 2007 Mar 29.
We present a direct measurement of the quenching of nonlocal heat transport in a laser-produced plasma by applying large external magnetic fields (>10 T). The temporally resolved Thomson-scattering measurements of the electron temperature profile show that the heat front propagation transverse to a high-power laser beam is slowed resulting in extremely strong local heating. We find agreement with hydrodynamic modeling when including a magnetic field model that self-consistently evolves the fields in the plasma.
我们通过施加强外部磁场（>10 T），对激光产生的等离子体中非局域热输运的猝灭进行了直接测量。对电子温度分布进行的时间分辨汤姆逊散射测量表明，垂直于高功率激光束方向的热前沿传播速度减慢，导致极强的局部加热。当在流体动力学模型中纳入一个能使等离子体中的磁场自洽演化的磁场模型时，我们发现该模型与实验结果相符。
