SF6-N2混合气激光触发延迟抖动特性研究
Delay and jitter properties of SF6-N2 mixtures triggered by pulsed laser
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摘要: 研究了SF6-N2混合气在四倍频Nd:YAG激光脉冲作用下的触发特性。实验结果表明：充SF6-N2混合气的火花隙的触发延迟和抖动、最低可触发阈值随充气压力及混合气中SF6含量上升而上升，随激光波长减小而减小，火花隙的触发延迟和抖动随焦距的减小而减小。由于SF6-N2混合气的介电强度、触发延迟和抖动与混合气中SF6含量之间均存在非线性关系，作为开关工作介质，SF6-N2混合气的综合性能较好的SF6含量范围是5%～45%。Abstract: This paper presents the triggering property of SF6-N2 mixtures triggered by a quadrupled Nd:YAG laser. The delay and jitter increased as the pressure and the percentage of SF6 in SF6-N2 mixtures increased. The working ratio followed the same rule. The delay, jitter and the working ratio decreased as the wavelength of laser decreased when t he mixing ratio, pressure and charging voltage kept constant. The delay and jitter of SF6-N2 mixtures decreased as the focus length decreased. The better mixing ratio of SF6-N2 mixtures used as switching media should be 5%～45%(SF6) if the dependence the dielectric strength and the delay, jitter on the percentage of SF6 in SF6-N2 mixtures is nonlinear.
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Key words:
- laser trigger /
- delay /
- jitter /
- lowest working ratio for triggering
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