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dc.contributor.authorDarrow, D.-
dc.description.abstractA scintillator type fast ion loss detector measures the gyroradius and pitch angle distribution of superthermal ions escaping from a magnetically confined fusion plasma at a single location. Described here is a technique for optimizing the angular orientation of such a detector in an axisymmetric tokamak geometry in order to intercept losses over a useful and interesting ranges of pitch angle. The method consists of evaluating the detector acceptance as a function of the fast ion constants of motion, i.e. energy, canonical toroidal momentum, and magnetic moment. The detector acceptance can then be plotted in a plane of constant energy and compared with the relevant orbit class boundaries and fast ion source distributions. Knowledge of expected or interesting mechanisms of loss can further guide selection of the detector orientation. The example of a fast ion loss detector for the National Spherical Torus Experiment-Upgrade (NSTX-U) is considered.en_US
dc.description.tableofcontentsReadme and data filesen_US
dc.publisherPrinceton Plasma Physics Laboratory, Princeton Universityen_US
dc.relationFusion Science and Technology, 2017en_US
dc.subjectFast ion lossen_US
dc.subjectParticle phase spaceen_US
dc.titleOptimization of the angular orientation for a fast ion loss detector in a tokamaken_US
pu.projectgrantnumber31016 G0001 10003086 101-
pu.depositorKaye, Stanley-
dc.contributor.funderU. S. Department of Energy contract number DE-AC02-09CH11466en_US
Appears in Collections:NSTX-U

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