Fast ion losses in the W7-AS stellarator

A new probe for the detection of fast escaping ions has been installed and operated at the W7-AS stellarator. Fast ions generated from neutral beam injection or ion cyclotron heating were used to study the fast ion confinement properties of the partially drift-optimized magnetic field structure as w...

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Bibliographic Details
Published in:Review of Scientific Instruments 2001-01, Vol.72 (1), p.780-783
Main Authors: Werner, A., Weller, A., Darrow, D. S.
Format: Article
Language:English
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Summary:A new probe for the detection of fast escaping ions has been installed and operated at the W7-AS stellarator. Fast ions generated from neutral beam injection or ion cyclotron heating were used to study the fast ion confinement properties of the partially drift-optimized magnetic field structure as well as losses induced by magnetohydrodynamic perturbations. The design of the probe is based on the α-particle detectors of the Tokamak Fusion Test Reactor using scintillator plates and allows the detection of co-and countergoing ions simultaneously in a wide range of gyroradii and pitch angles.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1319357