Analysis of H atoms in a negative ion source plasma with the non-equilibrium electron energy distribution function

S. Koga, T. Shibata, R. Terasaki, N. Kameyama, Akiyoshi Hatayama, M. Bacal, K. Tsumori

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In negative ion sources for the neutral beam injection, it is important to calculate H atom flux onto the plasma grid (PG) surface for the evaluation of H- production on the PG surface. We have developed a neutral (H 2 molecules and H atoms) transport code. In the present study, the neutral transport code is applied to the analysis of the H2 and H transport in a NIFS-RD ion source in order to calculate the flux onto the PG surface. Taking into account non-equilibrium feature of the electron energy distribution function (EEDF), i.e., the fast electron component, we have done the neutral transport simulation. The results suggest that the precise evaluation of the EEDF, especially in the energy range 15 eV < E < 30 eV is important for the dissociation rate of H2 molecules by the electron impact collision and the resultant H atom flux on the PG.

Original languageEnglish
Article number02A717
JournalReview of Scientific Instruments
Volume83
Issue number2
DOIs
Publication statusPublished - 2012

Fingerprint

Ion sources
negative ions
ion sources
Distribution functions
energy distribution
Negative ions
distribution functions
grids
electron energy
Plasmas
Atoms
Electrons
Fluxes
atoms
Molecules
beam injection
evaluation
neutral beams
electron impact
molecules

ASJC Scopus subject areas

  • Instrumentation

Cite this

Analysis of H atoms in a negative ion source plasma with the non-equilibrium electron energy distribution function. / Koga, S.; Shibata, T.; Terasaki, R.; Kameyama, N.; Hatayama, Akiyoshi; Bacal, M.; Tsumori, K.

In: Review of Scientific Instruments, Vol. 83, No. 2, 02A717, 2012.

Research output: Contribution to journalArticle

Koga, S. ; Shibata, T. ; Terasaki, R. ; Kameyama, N. ; Hatayama, Akiyoshi ; Bacal, M. ; Tsumori, K. / Analysis of H atoms in a negative ion source plasma with the non-equilibrium electron energy distribution function. In: Review of Scientific Instruments. 2012 ; Vol. 83, No. 2.
@article{34b0b8ff5b334deb8858ce547dfe1c67,
title = "Analysis of H atoms in a negative ion source plasma with the non-equilibrium electron energy distribution function",
abstract = "In negative ion sources for the neutral beam injection, it is important to calculate H atom flux onto the plasma grid (PG) surface for the evaluation of H- production on the PG surface. We have developed a neutral (H 2 molecules and H atoms) transport code. In the present study, the neutral transport code is applied to the analysis of the H2 and H transport in a NIFS-RD ion source in order to calculate the flux onto the PG surface. Taking into account non-equilibrium feature of the electron energy distribution function (EEDF), i.e., the fast electron component, we have done the neutral transport simulation. The results suggest that the precise evaluation of the EEDF, especially in the energy range 15 eV < E < 30 eV is important for the dissociation rate of H2 molecules by the electron impact collision and the resultant H atom flux on the PG.",
author = "S. Koga and T. Shibata and R. Terasaki and N. Kameyama and Akiyoshi Hatayama and M. Bacal and K. Tsumori",
year = "2012",
doi = "10.1063/1.3673009",
language = "English",
volume = "83",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Analysis of H atoms in a negative ion source plasma with the non-equilibrium electron energy distribution function

AU - Koga, S.

AU - Shibata, T.

AU - Terasaki, R.

AU - Kameyama, N.

AU - Hatayama, Akiyoshi

AU - Bacal, M.

AU - Tsumori, K.

PY - 2012

Y1 - 2012

N2 - In negative ion sources for the neutral beam injection, it is important to calculate H atom flux onto the plasma grid (PG) surface for the evaluation of H- production on the PG surface. We have developed a neutral (H 2 molecules and H atoms) transport code. In the present study, the neutral transport code is applied to the analysis of the H2 and H transport in a NIFS-RD ion source in order to calculate the flux onto the PG surface. Taking into account non-equilibrium feature of the electron energy distribution function (EEDF), i.e., the fast electron component, we have done the neutral transport simulation. The results suggest that the precise evaluation of the EEDF, especially in the energy range 15 eV < E < 30 eV is important for the dissociation rate of H2 molecules by the electron impact collision and the resultant H atom flux on the PG.

AB - In negative ion sources for the neutral beam injection, it is important to calculate H atom flux onto the plasma grid (PG) surface for the evaluation of H- production on the PG surface. We have developed a neutral (H 2 molecules and H atoms) transport code. In the present study, the neutral transport code is applied to the analysis of the H2 and H transport in a NIFS-RD ion source in order to calculate the flux onto the PG surface. Taking into account non-equilibrium feature of the electron energy distribution function (EEDF), i.e., the fast electron component, we have done the neutral transport simulation. The results suggest that the precise evaluation of the EEDF, especially in the energy range 15 eV < E < 30 eV is important for the dissociation rate of H2 molecules by the electron impact collision and the resultant H atom flux on the PG.

UR - http://www.scopus.com/inward/record.url?scp=84857803399&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84857803399&partnerID=8YFLogxK

U2 - 10.1063/1.3673009

DO - 10.1063/1.3673009

M3 - Article

VL - 83

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 2

M1 - 02A717

ER -