Neutralization efficiency estimation in a neutral beam source based on inductively coupled plasma
- Sungkyunkwan Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Jangan-Gu Chunchun-Dong 300, Suwon 440-746 (Korea, Republic of)
This study examined the optimal conditions of neutral beam generation to maintain a high degree of neutralization and focusing during beam energy variation for a neutral beam source based on inductively coupled plasma with a three-grid ion beam acceleration system. The neutral beam energy distribution was estimated by measuring the energy profiles of ions that 'survived' the neutralization after reflection. The energy measurements of the primary and reflected ions showed narrow distribution functions, each with only one peak. At higher beam energies, both the ratio of the ion energy loss to the primary energy and the degree of energy divergence decreased, confirming the precise alignment of the neutral beam. The neutralization efficiency of the neutral beam source with a three-grid acceleration system was found to be affected mainly by the beam angle divergence rather than by the particle translation energy.
- OSTI ID:
- 21185946
- Journal Information:
- Journal of Applied Physics, Vol. 105, Issue 1; Other Information: DOI: 10.1063/1.2987475; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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