The Institute of Information Optics, Zhejiang Normal University, Jinhua, 321004, China.
Opt Lett. 2011 Aug 1;36(15):2961-3. doi: 10.1364/OL.36.002961.
A nanosecond pulse discharge circuit is developed and used to enhance the optical emission of laser plasma. An intense discharge spark was observed with a peak discharge current of 1.9 kA and a peak power of 6.5 MW. The main electric energy deposition only lasted for ∼40 ns. An intense optical emission was observed. The line intensity of plasma emission was greatly increased along with an improved signal-to-noise ratio, in comparison with that using a microsecond pulse discharge circuit. From the measured spectra, electron temperature and electron number density were estimated. The mechanism of the optical emission enhancement was briefly discussed.
纳秒脉冲放电电路被开发并用于增强激光等离子体的光发射。观察到一个强烈的放电火花，其峰值放电电流为 1.9 kA，峰值功率为 6.5 MW。主要的电能沉积仅持续了约 40 ns。观察到强烈的光发射。与使用微秒脉冲放电电路相比，等离子体发射的谱线强度大大增加，同时信噪比也得到了提高。根据测量的光谱，估算了电子温度和电子数密度。简要讨论了光发射增强的机制。
