### Abstract

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 function (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.

Original language | English |
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Article number | 02B125 |

Journal | Review of Scientific Instruments |

Volume | 85 |

Issue number | 2 |

DOIs | |

Publication status | Published - 2014 Feb |

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### ASJC Scopus subject areas

- Instrumentation

### Cite this

*Review of Scientific Instruments*,

*85*(2), [02B125]. https://doi.org/10.1063/1.4852296