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Numerical analysis of atomic density distribution in arc driven negative ion sources.
- Source :
- Review of Scientific Instruments; 2014, Vol. 85 Issue 2, p1-4, 4p
- Publication Year :
- 2014
-
Abstract
- The purpose of this study is to calculate atomic (H<superscript>0</superscript>) density distribution in JAEA 10 ampere negative ion source. A collisional radiative model is developed for the calculation of the H<superscript>0</superscript> density distribution. The non-equilibrium feature of the electron energy distribution function (EEDF), which mainly determines the H<superscript>0</superscript> production rate, is included by substituting the EEDF calculated from 3D electron transport analysis. In this paper, the H<superscript>0</superscript> 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<superscript>0</superscript> production and the ionization are enhanced. The calculated H<superscript>0</superscript> density distribution with-out the effect of the H<superscript>0</superscript> transport is relatively small in the upper region. In the next step, the effect should be taken into account to obtain more realistic H<superscript>0</superscript> distribution. [ABSTRACT FROM AUTHOR]
- Subjects :
- ANIONS
ION sources
NUCLEAR physics instruments
ELECTRON transport
CATHODE rays
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 85
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 97144108
- Full Text :
- https://doi.org/10.1063/1.4852296