【摘要】 光导开关作为一种新型固体开关,具有闭合时间短(ps量级)、时间抖动小、重复频率高、功率容量大、光电隔离等优势,脉冲功功率技术研究领域受到广泛关注。实验研究表明,光导开关性能与工作电压、导通电流、触发激光参数、重复频率、工作环境及开关制作工艺等诸多因素密切相关,寿命差异从几百次至几十亿次不等。为了研究在较大导通电流下的开关特性,获得了开关电阻特性随工作发次的变化关系,为开关寿命提升奠定了实验基础。更多还原

【Abstract】 Photoconductive semiconductor switch( PCSS) has been widely investigated due to its advantages over conventional switches. Experiments show that characteristics of Ga As PCSS is closely related to various parameters such as working voltage, conduction current, triggering light, repetitive frequency, ambient environment and manufacturing procedures. Working life varies from several hundred times to a billion times under different circumstances. Ga As Photoconductive Semiconductor Switches(PCSS) with peak current over 2.42 k A has been developed and tested. Degradation of Ga As PCSS is observed during working. Results show that peak conduction current is found to decrease with working shots, and dark resistance changes with working shots too.更多还原