The cascaded arc : high flows of rovibrationally excited H2 and its impact on H- ion formation

O.G. Gabriel, W.E.N. Harskamp, van, D.C. Schram, M.C.M. Sanden, van de, R.A.H. Engeln

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)
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Samenvatting

The cascaded arc is a plasma source providing high fluxes of excited and reactive species such as ions, radicals and rovibrationally excited mols. The plasma is produced under pressures of some kPa in a d.c. arc with elec. powers up to 10 kW. The plasma leaves the arc channel through a nozzle and expands with supersonic velocity into a vacuum-chamber kept by pumps at low pressures. We investigated the case of a pure hydrogen plasma jet with and without an applied axial magnetic field that confines ions and electrons in the jet. Highly excited mols. and atoms were detected by means of laser-induced fluorescence and optical emission spectroscopy. In case of an applied magnetic field the at. state distribution of hydrogen atoms shows an overpopulation between the electronic states p = 5, 4 and 3. The influence of the highly excited hydrogen mols. on H- ion formation and a possible mechanism involving this neg. ion and producing at. hydrogen in state p = 3 will be discussed.
Originele taal-2Engels
TitelNegative Ions, Beams and Sources : proceedings of the 1st international symposium on negativce ions, beams and sources
RedacteurenE. Surrey, A. Simonin
Plaats van productieNew York
UitgeverijAmerican Institute of Physics
Pagina's22-30
ISBN van geprinte versie978-0-7354-0630-8
DOI's
StatusGepubliceerd - 2009
Evenementconference; Negative Ions beams and sources : 1st international symposium; 2008-09-09; 2008-09-12 -
Duur: 9 sep 200812 sep 2008

Publicatie series

NaamAIP Conference Proceedings
Volume1097
ISSN van geprinte versie0094-243X

Congres

Congresconference; Negative Ions beams and sources : 1st international symposium; 2008-09-09; 2008-09-12
Periode9/09/0812/09/08
AnderNegative Ions beams and sources : 1st international symposium

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