Confinement of Neutral Beam Ions in the National Spherical Torus Experiment
Author(s) -
D. Darrow,
S. Medley,
A. L. Roquemore,
A. Rosenberg
Publication year - 2001
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/792997
Subject(s) - thermocouple , plasma , faraday cup , ion , radius , torus , tangent , atomic physics , beam (structure) , faraday cage , optics , langmuir probe , physics , plasma diagnostics , ion beam , materials science , geometry , nuclear physics , magnetic field , mathematics , computer security , quantum mechanics , computer science
The loss of neutral-beam ions to the wall has been measured in the National Spherical Torus Experiment (NSTX) by means of thermocouples, an infrared (IR) camera, and a Faraday cup probe. The losses tend to exhibit the expected dependences on plasma current, tangency radius of the injector, and plasma outer gap. However, the thermocouples and the Faraday cups indicate substantially different levels of loss and this difference has yet to be understood
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