Motwani Kapil, Ghodke Dharmraj V, Amban Ajith, Kochunarayanan Murali Krishnan, Ansari M S, Prasad Vijendra
Proton Linac Development Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India.
Homi Bhabha National Institute, Mumbai, Maharashtra 400094, India.
Rev Sci Instrum. 2023 Oct 1;94(10). doi: 10.1063/5.0155386.
The simplest way to produce high density hydrogen plasmas is to form an arc between the arcing electrode and the plasma chamber (cathode). For arc-based hydrogen plasma generation, a pulsed power supply that delivers 2 ms-long constant current pulse has been developed. This pulsed power supply employs a high frequency buck converter topology with a nonlinear filter inductor. This paper describes the development and testing of a constant current pulsed power supply that operates at 50 A and 550 V with a pulse width of 2 ms and a pulse repetition rate of 2 Hz. By changing the arc current, the arc impedance and the positive hydrogen ion current were also measured. The extraction of positive hydrogen ions was carried out using a three-electrode extraction design, which results in a current of 80 mA of positive hydrogen ions at an energy of 50 keV.
产生高密度氢等离子体最简单的方法是在电弧电极和等离子体腔室（阴极）之间形成电弧。对于基于电弧的氢等离子体产生，已开发出一种能提供2毫秒长恒定电流脉冲的脉冲电源。该脉冲电源采用具有非线性滤波电感的高频降压转换器拓扑结构。本文描述了一种恒定电流脉冲电源的开发与测试，该电源工作在50 A和550 V，脉冲宽度为2毫秒，脉冲重复率为2赫兹。通过改变电弧电流，还测量了电弧阻抗和正氢离子电流。正氢离子的提取采用三电极提取设计，在50 keV能量下可产生80 mA的正氢离子电流。
