Modeling of electron temperature in H- ion source

Takatoshi Morishita, Masatada Ogasawara, Akiyoshi Hatayama

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The equation of electron temperature is included in a two point numerical code for a high power hydrogen negative ion source. The calculated results of the electron temperature are in good agreement with Japan Atomic Energy Research Institute (JAERI)'s experimental results. The scaling law of electron temperature is estimated as a function of input power and gas pressure. Energy input by arc discharge, energy loss by ionization, dissociation and loss on the wall are considered in the electron energy equation. The leak width on the wall at the cusp magnet is also calculated numerically. Energy loss on the wall is dominant, and is larger than the ionization loss. In a similarly enlarged JAERI's Kamaboko source, electron density increases and electron temperature decreases under a constant energy input per unit volume. In this situation, H- extraction current increases despite the decrease in H- density because of the enlargement of the H- extraction area.

Original languageEnglish
Pages (from-to)2809-2815
Number of pages7
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume39
Issue number5 A
Publication statusPublished - 2000 May 1

Fingerprint

Electron temperature
Ion sources
ion sources
electron energy
Ionization
Energy dissipation
energy dissipation
Scaling laws
ionization
Nuclear energy
Discharge (fluid mechanics)
arc discharges
Magnets
Carrier concentration
hydrogen ions
nuclear energy
cusps
Negative ions
negative ions
scaling laws

Keywords

  • Electron temperature equation
  • Electron temperature scaling
  • Large ion source
  • Modeling
  • Negative ion source
  • Numerical simulation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Modeling of electron temperature in H- ion source. / Morishita, Takatoshi; Ogasawara, Masatada; Hatayama, Akiyoshi.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 39, No. 5 A, 01.05.2000, p. 2809-2815.

Research output: Contribution to journalArticle

Morishita, Takatoshi ; Ogasawara, Masatada ; Hatayama, Akiyoshi. / Modeling of electron temperature in H- ion source. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2000 ; Vol. 39, No. 5 A. pp. 2809-2815.
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