Observation of a stable dense core within an unstable coronal plasma in wire-initiated dense Z-pinch experiments.
Observation of a stable dense core within an unstable coronal plasma in wire-initiated dense Z-pinch experiments.
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DOI：
10.1103/physrevlett.71.3806
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发表时间：
1993-12
影响因子：
8.6
通讯作者：
Kalantar;Hammer
中科院分区：
文献类型：
--
作者：
Kalantar;Hammer
本文研究了用100--350 kA，100 ns的电流脉冲从直径为25--100 μ m的单根铝丝上激发的稠密z箍缩等离子体，时间分辨率为1 ns。用亚纳秒脉冲氮激光观察到金属丝周围形成的日冕等离子体的快速不稳定膨胀，而用1- 2ns的X射线背光脉冲观察到致密的核心，其膨胀更缓慢和稳定。核心包含了大部分的初始导线质量，但似乎有很少或没有电流在其中流动。
Dense z-pinch plasmas initiated from a single 25--100 \ensuremath{\mu}m diam aluminum wire using a 100--350 kA, 100 ns current pulse have been studied with \ensuremath{\le}1 ns time resolution. Rapid unstable expansion of a coronal plasma formed around the wire was observed with a subnanosecond pulsed nitrogen laser, while a dense core, which expanded more slowly and stably, was observed with 1--2 ns x-ray backlighting pulses. The core contained most of the initial wire mass, but there appeared to be little or no current flowing in it.