Investigation of plasma parameters at BATMAN for variation of the Cs evaporation asymmetry and comparing two driver geometries | Zendy

Christian Wimmer | Zendy; U. Fantz | Zendy; E. Aza | Zendy; Jovica Jovović | Zendy; W. Kraus | Zendy; A. Mimo | Zendy; L. Schiesko | Zendy

Open Access

Investigation of plasma parameters at BATMAN for variation of the Cs evaporation asymmetry and comparing two driver geometries

Author(s) -

Christian Wimmer,

U. Fantz,

E. Aza,

Jovica Jovović,

W. Kraus,

A. Mimo,

L. Schiesko

Publication year - 2017

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.4995741

Subject(s) - plasma , evaporation , ion , spectroscopy , langmuir probe , ion source , hydrogen , materials science , atomic physics , laser , diode , cavity ring down spectroscopy , plasma diagnostics , optics , optoelectronics , analytical chemistry (journal) , chemistry , physics , nuclear physics , organic chemistry , quantum mechanics , thermodynamics , chromatography

The Neutral Beam Injection (NBI) system for fusion devices like ITER and, beyond ITER, DEMO requires large scale sources for negative hydrogen ions. BATMAN (Bavarian Test Machine for Negative ions) is a test facility attached with the prototype source for the ITER NBI (1/8 source size of the ITER source), dedicated to physical investigations due to its flexible access for diagnostics and exchange of source components. The required amount of negative ions is produced by surface conversion of hydrogen atoms or ions on caesiated surfaces. Several diagnostic tools (Optical Emission Spectroscopy, Cavity Ring-Down Spectroscopy for H−, Langmuir probes, Tunable Diode Laser Absorption Spectroscopy for Cs) allow the determination of plasma parameters in the ion source. Plasma parameters for two modifications of the standard prototype source have been investigated:Firstly, a second Cs oven has been installed in the bottom part of the back plate in addition to the regularly used oven in the top part of the back plate...

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