Numerical and experimental investigation on water shocks due to pulsed discharge in accelerators

被引：2

作者：

Xun T. ^{[1
]}

Yang H. ^{[1
]}

Zhang J. ^{[1
]}

Gao J. ^{[1
]}

机构：

[1] College of Optoelectronic Science and Engineering, National University of Defense Technology

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 02期

关键词：

Ceramic interface; Electrical water shock; Explosive simulation; Scaling experiment; Shockwaves;

D O I：

10.3788/HPLPB20102202.0425

中图分类号：

学科分类号：

摘要：

Pulsed discharge in water produces transient shockwaves which are harmful to the ceramic interface in accelerators. In this paper, with a self-consistent underwater explosive approach, a finite element model was set up to investigate the shockwave behaviors, and the pressure-time history and ceramic mechanical response to shockwaves were presented. In order to get the pressure profile and verify the calculation models, a small-scaled water switch test was conducted based on a 10-stage Marx generator (40~50 ns pulse duration, 100~300 kV amplitude). The variations of peak pressure, shock velocity and main pulse width under different breakdown conditions were measured. According to the calculation of empirical formulas, about 17% of the discharge energy was transformed into the mechanical energy of the shockwave. The relationship between peak pressure and shock energy was also figured out and the experimental formula has a close approximation to the simulation result.

引用

页码：425 / 429

页数：4

共 16 条

[1] Barker R.J., Schamiloglu E., High Power Microwave Source and Technologies, (2001)
[2] Xun T., Yang H., Zhang J., Et al., Design of a ceramic radial insulation structure for a high current diode, High Power Laser and Particle Beams, 19, 6, pp. 1019-1022, (2007)
[3] Nation J.A., Vacuum Equipment for Ultra High Power Microwave Experiments, (1999)
[4] Grady D.E., Dynamic Properties of Ceramic Materials, (1995)
[5] Xiao S., Kolb J., Kono S., Et al., High power water switches: Postbreakdown phenomena and dielectric recovery, IEEE Trans on Dielectrics and Electrical Insulation, 11, 4, pp. 604-610, (2004)
[6] Sunka P., Pulse electrical discharge in water and their applications, Phys Plasmas, 8, pp. 2587-2594, (2001)
[7] Van Denvender J.P., The resistive phase of a high-voltage water spark, J Appl Phys, 49, 5, pp. 2616-2620, (1978)
[8] Grinenko A., Efimov S., Fedotov A., Et al., Efficiency of the shock wave generation caused by underwater electrical wire explosion, J Appl Phys, 100, 11, pp. 3509-3517, (2006)
[9] Gary R.H., Plasma Driven Water Shock, (1996)
[10] Shen Z., Dong S., Analysis of hydrodynamic loading due to pulsed discharge in a water pulse forming line of a REB accelerator, Proceeding of the Decade Selected Works of high Pulsed Power in China, pp. 268-273, (1995)

← 1 2 →