氢氩等离子体中H原子Balmer α谱线超常展宽研究

在新能源的研究中, 氢能成为与太阳能、风能等一样的绿色能源. 分数H原子是在某些特定催化物(如Ar⁺)的作用下, 基态H原子可以向比基态能级更低的分数主量子数能级跃迁, 同时释放出大量能量. 通过对氢氩等离子体H原子Balmerα 谱线超常展宽的规律性进行研究, 探讨这种伴随着大量能量释放的含H等离子体反应的存在性. 研究结果表明: 利用空心阴极放电管证实高能H原子的存在并首次发现超常展宽与氢氩配比的关系符合催化反应的特点; 通过比较研究的方法, 在实验上寻找加强含H等离子体反应的途径, 得到了更加清晰的H原子Balmerα 谱线超常展宽(半高展宽达到0. 245 nm). 关键词： 氢氩等离子体 H原子超常谱线展宽 氢能     

A New Discharge Scheme of a Prepulse Plus Two Main Pulses for Capillary-Discharge Soft-X-Ray Laser

Reducing the capillary-discharge current is one way of possibly decreasing the pumping power requirement. We examine the influence of various discharge currents on laser intensity and determine the suitable pre-discharge condition for a 46.9-nm discharge-pumped Ne-like Ar soft-x-ray amplifier. The experimental results show that a high additional pre-pulse current at amplitude of several kA and with a very short duration of several tens of nanosecond can effectively decrease the amplitude of the main discharge current at the lasing time. We propose a new discharge scheme of a pre~pulse plus two main pulses which appears to significantly decrease the requirement for discharge current. This in turn may decrease the pumping power requirement for the capillary discharge laser and can greatly increase laser efficiency.