A laser‐induced fluorescence diagnostic for divertors

It is proposed that the technique of laser‐induced fluorescence (LIF) be used to measure local ion velocity distributions in tokamak divertors. Recent theoretical work has indicated the existence of highly populated excited states of many partially stripped ions. These states are often connected to...

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Bibliographic Details
Published in:Review of Scientific Instruments 1995-01, Vol.66 (1), p.600-602
Main Authors: McChesney, J. M., Lippmann, S. I., Goldstein, W. H., Fournier, K. B.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700420 > Fusion Technology-- Plasma-Facing Components-- (1992-)
CHARGED PARTICLES
CLOSED PLASMA DEVICES
DIVERTORS
EMISSION SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
FLUORESCENCE SPECTROSCOPY
ION TEMPERATURE
IONS
LASER SPECTROSCOPY
MULTICHARGED IONS
PLASMA DIAGNOSTICS
SPECTROSCOPY
THERMONUCLEAR DEVICES 700320 > Plasma Diagnostic Techniques & Instrumentation-- (1992-)
TOKAMAK DEVICES
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Summary:It is proposed that the technique of laser‐induced fluorescence (LIF) be used to measure local ion velocity distributions in tokamak divertors. Recent theoretical work has indicated the existence of highly populated excited states of many partially stripped ions. These states are often connected to nearby levels by means of visible radiation, allowing useful LIF schemes to be devised. Passive spectroscopic measurements on DIII–D will be presented which verify some of the theoretical predictions. We considered ten Be‐like and Mg‐like ions and were able to identify over 150 LIF schemes. A possible laser system and experimental layout for the DIII–D tokamak will be presented.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1146299