Study of laser target triggering for spark gap switches
Study of laser target triggering for spark gap switches
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DOI：
10.1109/tdei.2009.5211839
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发表时间：
2009-08
影响因子：
3.1
通讯作者：
D. Sullivan;J. Gahl;S. Kovaleski;B. Hutsel
中科院分区：
文献类型：
--
作者：
D. Sullivan;J. Gahl;S. Kovaleski;B. Hutsel
使用激光目标作为一种方法，以减少所需的激光能量，以触发激光触发气体开关已经在密苏里大学进行了研究。根据耐久性、熔点、反应性和反射系数来确定目标材料。将激光靶置于激光触发气体开关的阴极中。该开关由Tiger脉冲功率机脉冲充电至185千伏至330千伏之间。该开关是通过将Nd:YAG激光器发出的1064 nm或266 nm波长的激光脉冲引导到激光目标上来烧蚀材料并产生等离子体，从而关闭开关。该项目的目标是用小于1mj的激光能量触发高压气体开关，同时保持开关抖动，与目前基于LTD系统的电触发开关相当。该研究成功地证明了使用1mj红外脉冲和石墨靶触发开关导致的抖动小于5ns。研究结果将用于基于LTD系统的开关设计。
The use of laser targets as a method to decrease the required laser energy to trigger a laser triggered gas switch has been investigated at the University of Missouri. Target materials were identified based on durability, melting point, reactivity and reflection coefficient. Laser targets were placed into a cathode of a laser triggered gas switch. The switch was pulse charged by the Tiger pulsed power machine to between 185 kV and 330 kV. The switch was triggered by directing a 1064 nm or 266 nm wavelength laser pulse from an Nd:YAG laser onto a laser target to ablate material and create plasma, closing the switch. The goal of the project was to trigger a high voltage gas switch with less than 1 mJ of laser energy while maintaining a switch jitter comparable to present electrically triggered switches for LTD based systems. The study successfully demonstrated that triggering the switch using a 1 mJ infrared pulse and a graphite target resulted in a jitter less than 5 ns. Findings will be used in the design of switches for LTD based systems.