Collision of H{sup {minus}} with A{sup q+} ions and their relevance for fusion
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:281282
- Giessen Univ. (Germany)
Employing the crossed-beams technique, we have measured absolute cross sections for single- and double-electron removal from H{sup -} in collisions with ions Ar{sup q+} and Xe{sup q+} (q {<=} 8) at cm-energies between 20 keV and 200 keV. The single-electron removal cross sections are in excellent agreement with quantum calculations by Presnyakov and Uskov based on a generalization of the Keldysh theory for multi-photon ionization. The data allows, for the first time, a realistic modelling of plasma neutralizers proposed for efficient production of powerful H{sup 0} beams via neutralization of energetic H{sup -} ion beams. Multi-megawatt neutral beam injection is a proven technique for auxiliary heating of magnetically confined fusion plasmas. The next fusion tokamak ITER calls for a total of 75 MW neutral beam heating based on 1.3 MeV D{sup 0} beams.
- OSTI ID:
- 281282
- Report Number(s):
- CONF-9305421--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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