Evolution of the electrically exploding wire observed with a Mach–Zehnder interferometer
Evolution of the electrically exploding wire observed with a Mach–Zehnder interferometer
复制标题
DOI：
10.1063/1.3132058
复制
发表时间：
2009-05
影响因子：
4
通讯作者：
Z. Mao;X. Zou;Xinxin Wang;Weihua Jiang
中科院分区：
文献类型：
--
作者：
Z. Mao;X. Zou;Xinxin Wang;Weihua Jiang
用马赫-曾德尔干涉法研究了钛丝在10 kPa空气中爆炸后的演化过程。爆炸丝的特征在于中心致密的核心以及周围的等离子体和快速膨胀的气体外壳。根据条纹位移，等离子体的电子密度和气体壳层中增加的密度分别计算为1.94×1018/cm 3和4.78×10−4 g/cm 3。气壳层的膨胀速度约为2.28km/s。观察到致密蒸汽芯的热膨胀滞后和丝的两相蒸发。由于金属丝在“欠热”模式下爆炸，蒸发的第一阶段是通过焦耳加热，第二阶段是通过等离子体加热。
The evolution of an exploding titanium wire embedded in 10 kPa air was studied with Mach–Zehnder interferometry. The exploding wire is characterized by a central dense core as well as the surrounding plasma and a rapidly expanding gas shell. Based on the fringe shifts, the electron density of the plasma and the increased density in the gas shell were calculated to be about 1.94×1018/cm3 and 4.78×10−4 g/cm3, respectively. The expanding speed of the gas shell is about 2.28 km/s. A thermal expansion lag of the dense vapor core and two-phase vaporization of the wire were observed. Due to the wire exploding in “under heat” mode, the first phase of the vaporization is by the Joule heating and the second one by the plasma heating.