Characteristics of Exploding-Wire Plasmas
Characteristics of Exploding-Wire Plasmas
复制标题
爆炸线等离子体的特性
DOI：
10.1109/tps.1985.4316399
复制
发表时间：
1985
影响因子：
1.5
通讯作者：
V. Rohatgi
中科院分区：
文献类型：
--
作者：
T. Vijayan;V. Rohatgi
在能量范围 E < Ee 到 E > 几个 Ee 内研究了金属丝爆炸的现象，其中 Ee 是金属丝完全蒸发所需的能量密度。当 E < Ee 时，会发生金属丝的宏观碎裂（尺寸约为数十微米）。当 E 增加到 Ee 以上时，碎片尺寸趋向于原子尺寸，并且当 E >> Ee 时，会发生爆炸性汽化，从而产生高温等离子体。研究表明，爆炸过程中，等离子体处于非平衡状态，温度高达10 eV或更高。该等离子体在数十纳秒内达到平衡。该等离子体的自由膨胀速度约为 105-106 cm/s，并随着 E 的增加而增加。因此，当 E >> Ee 时，等离子体密度降低。大约 100 ns 后，所得等离子体密度在 1018-1020 cm-3 范围内。此类等离子体对粒子束、激光和快速切换系统的开发具有重大意义。
The phenomenon of exploding wire has been investigated in the energy range E < Ee to E > a few Ee, where Ee is the energy density required for complete evaporation of the wire. For E < Ee, macroscopic fragmentation (size ~ tens of micrometers) of wire takes place. As E is increased above Ee, the fragment size tends to atomic dimensions, and for E >> Ee explosive vaporization occurs resulting in high-temperature plasma. The study indicates that during the explosion, plasma is in a nonequilibrium state with temperatures as high as 10 eV or more. This plasma attains equilibrium in tens of nanoseconds. The free-expansion velocity of this plasma is of the order 105-106 cm/s and increases with increasing E. Consequently, the plasma density decreases for E >> Ee. After about 100 ns, the resulting plasma densities are in the region of 1018-1020 cm-3. Such plasmas have significant interest in the development of particle beams, laser, and fast switching systems.