影响高功率脉冲氙灯寿命的因素

以美国NOVA和国家点火装置用的高功率脉冲氙灯为例,结合对神光Ⅲ装置用脉冲氙灯的分析,发现了影响脉冲氙灯失效的几个因素,包括石英灯管应力、氙灯尺寸、灯管微缺陷、电极溅射、灯头绝缘、氙气纯度、封接可靠性及周围氙灯放电。结果发现:在进灯能量相同的情况下,氙灯电极弧长越长,内径越大,寿命越高;石英灯管表面的静态拉应力、内表面的微缺陷以及周围氙灯的电离辐射使得氙灯的额外负载能量大大增加,这些是导致氙灯爆炸概率变大的直接因素。

Influencing factors of life of high power linear xenon-filled flash lamp

This paper analyzes the factors influencing the failures of high power linear xenon-filled flash lamps in NOVA, NIF and Shenguang-Ⅲ. The factors include the correlations between the stress and flash lamp explosion, the correlation between lifetime and lamp size, microdefects of lamp wall, electrode sputtering, insulation, xenon purity, sealing reliability and the increase in energy deposition into flash lamp quartz envelopes caused by the absorption of radiation from neighboring flash lamps. Given the same input energy, the lifetime is longer for the lamp with longer arc length and bigger bore diameter. Direct causes of flash lamp explosion are the surface static tensile stress on the flash lamp quartz envelopes, the microdefects on the inner surface and the increase in energy deposition