A Proposal For The Improvement Of Non-Cesiated H- -- Sources
- Johann Wolfgang Goethe - Universitaet Frankfurt am Main, Max von Laue - Strasse 1, D-60438 Frankfurt (Germany)
The comparison of cesiated sources for H-, like Camembert-III and the SNS source with the non-cesiated DESY source leads to an interesting conclusion how volume production of H- ions might be performed in the DESY source: The generation of vibrationally highly excited H2 -- molecules is also possible by protons with energies of some tenth of eV. This may solve the dilemma of volume production how to provide enough high energy electrons for the creation of excited molecules and how to completely suppress them in the region, where H- ions are born by atachment of low energy electrons to excited molecules. An H- ion source, which uses protons to generate the vibrationally excited molecules, needs an intense proton beam of some tenth of eV injected to a plasma with low electron energy and high hydrogen pressure. This may be achieved by the direct coupling of two plasma generators. The proton beam will be accelerated by the potential fall in the sheath of the first plasma generator and by the bias to the second one. Space charge limitations of a drifting beam thus may be avoided resulting in a high intensity proton beam at optimum low energy.
- OSTI ID:
- 21032647
- Journal Information:
- AIP Conference Proceedings, Vol. 925, Issue 1; Conference: 11. international symposium on the production and neutralization of negative ions and beams, Santa Fe, NM (United States), 13-15 Sep 2006; Other Information: DOI: 10.1063/1.2773655; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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