Multichannel neutral‐particle analyzer system

A multichannel neutral‐analyzer system developed for the analysis of charge‐exchange flux from magnetically confined plasma is described. The system uses tandem magnetic–electrostatic deflection of ions produced from neutrals stripped in a gas cell to obtain the energy spectra of specific charge‐to‐...

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Bibliographic Details
Published in:Review of scientific instruments 1979-10, Vol.50 (10), p.1227-1235
Main Authors: Nexsen, W. E., Turner, W. C., Cummins, W. F.
Format: Article
Language:English
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Summary:A multichannel neutral‐analyzer system developed for the analysis of charge‐exchange flux from magnetically confined plasma is described. The system uses tandem magnetic–electrostatic deflection of ions produced from neutrals stripped in a gas cell to obtain the energy spectra of specific charge‐to‐mass‐ratio species. The analyzer is collimated with a spatial resolution of 2 cm FWHM at the plasma and is movable so that radial scans of charge‐exchange flux can be made. Data are recorded digitally, allowing frequency response of fluctuations in charge‐exchange flux up to 50 kHz. The calibration procedure employs an auxiliary single‐channel analyzer calibrated over the full energy range of the multichannel instrument with an atomic‐beam setup. Typical data obtained from the 2XIIB neutral‐beam‐injected mirror machine are briefly presented.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1135679