Numerical Analysis on Production Mechanism of Negative Ions in Hydrogen Plasmas

水素放電による負イオンの生成機構

Numerical Analysis on Production Mechanism of Negative Ions in Hydrogen Plasmas

Creators Fukumasa Osamu

Creators Saeki Setsuo

In order to clarify the mechanism of volume production of negative ions, both negative and positive ion species in hydrogen plasmas are calculated numerically as a function of plasma parameters by using the particle balance model. In this analysis, we distinguish between the fast electrons e_f and the thermal electrons e, and between the vibrationally excited hydrogen molecules H^*_2 and the ground state molecules H_2. Numerical results show that the negative ions are generated mostly by dissociative attachment to vibrationally excited molecules in a following two step process : e_f+H_2&xrarr

[ISSN]0372-7661

[NCID]AN00244228