Cs-doped Mo as surface converter for H{sup −}/D{sup −} generation in negative ion sources: First steps and proof of principle

Journal Article · Wed Apr 08 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4916412· OSTI ID:22391395

Hopf, C.; Höschen, T.; Meisl, G.; Encke, O.; Franzen, P.; Heinemann, B.; Hopf, C.; Fantz, U. ^[1]; Cartry, G.; Achkasov, K. ^[2]

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1. Max-Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, D-85748 Garching (Germany)
2. Aix Marseille University, CNRS, PIIM, UMR 7345, F-13013 Marseille (France)

In a proof-of-principle study, molybdenum samples were implanted with a very small dose of Cs in order to test the properties of the compound as a surface converter for negative hydrogen ion production. First results on the properties of Cs doped Mo compounds show a reduction of the work function and a stable H{sup −} yield up to four hours in low density hydrogen plasma. The implanted Cs atoms were stable in the Mo lattice over one year for samples stored in vacuum and not exposed to the plasma. The surface H{sup −} generation mechanisms were identified and a comparison of the negative ion yield with pure Mo showed that the Cs doped Mo sample’s yield was much larger.

• OSTI ID: 22391395
• Journal Information: AIP Conference Proceedings, Vol. 1655, Issue 1; Conference: NIBS 2014: 4. International Symposium on Negative Ions, Beams and Sources, Garching (Germany), 6-10 Oct 2014; Other Information: (c) 2015 U.S. Government; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
07 ISOTOPES AND RADIATION SOURCES
ATOMS
COMPARATIVE EVALUATIONS
DOPED MATERIALS
HYDROGEN
HYDROGEN IONS 1 MINUS
ION SOURCES
MOLYBDENUM
MOLYBDENUM COMPOUNDS
PLASMA
PLASMA DENSITY
SURFACES
WORK FUNCTIONS
YIELDS