Numerical analysis of atomic density distribution in arc driven negative ion sources

作者：Yamamoto T^*; Shibata T; Kashiwagi M; Hatayama A; Sawada K; Hanada M

来源：Review of Scientific Instruments, 2014, 85(2): 02B125.

DOI：10.1063/1.4852296

The purpose of this study is to calculate atomic (H-0) density distribution in JAEA 10 ampere negative ion source. A collisional radiative model is developed for the calculation of the H-0 density distribution. The non-equilibrium feature of the electron energy distribution EEDF), which mainly determines the H-0 production rate, is included by substituting the EEDF calculated from 3D electron transport analysis. In this paper, the H-0 production rate, the ionization rate, and the density distribution in the source chamber are calculated. In the region where high energy electrons exist, the H-0 production and the ionization are enhanced. The calculated H-0 density distribution without the effect of the H-0 transport is relatively small in the upper region. In the next step, the effect should be taken into account to obtain more realistic H-0 distribution.

• 出版日期2014-2