Spectroscopicinvestigationsof ion dynamics in an inertial-electrostatic confinement discharge

测量了氦/氢混合气体中惯性-静电约束放电产生的中心阴极等离子体中H-α谱线的多普勒频移。根据观测到的Hα近翼的最大位移估计了加速电压，并根据激光诱导荧光法测量的电势分布估计了等离子体中心和阴极之间的电势差。这表明，激发的H原子是由H离子在阴极内部与背景H原子或分子形成的电势加速的电荷交换反应中产生的。

Doppler shift of Hαspectral lines were measured in the central cathode plasma generated by an Inertial-Electrostatic Confinement discharge in He/H2mixture. Acceleration voltages were estimated from the observed maximum shift of near wings of Hα, and agreed with potential differences between the plasma center and the cathode, estimated from the potential profiles measured by the laser-induced fluorescence method. This suggests that excited H atoms are generated by charge-exchange reactions of H ions accelerated by the potential formed inside the cathode with backgroundH atoms or molecules.