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R. K. Fisher

Researcher at General Atomics

Publications -  56
Citations -  1860

R. K. Fisher is an academic researcher from General Atomics. The author has contributed to research in topics: Alpha particle & Plasma. The author has an hindex of 22, co-authored 56 publications receiving 1743 citations.

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Neutron images recorded with high-resolution bubble detectors

TL;DR: The gel-type bubble detector as mentioned in this paper can be used for high-yield (6×1013) targets with a precision of better than 25 μm and is insensitive to x-ray and gamma-ray background.
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Alpha diagnostics using pellet charge exchange: Results on the Tokamak Fusion Test Reactor and prospects for ITER

TL;DR: In this paper, the authors describe the diagnostic capabilities of PCX demonstrated on TFTR and discuss the prospects for applying this technique to ITER, where the pellet perturbation to the plasma and obtaining satisfactory penetration into the plasma are discussed.
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Measurements of nonthermal confined alpha particles in Tokamak Fusion Test Reactor D-T plasmas (invited)

TL;DR: In this article, the first two years of the Tokamak test fusion reactor (TFTR) D-T operation is summarized and a brief summary of the concept, instrumentation, and analysis techniques for each diagnostic is given, followed by examples of alpha physics results.
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Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector.

TL;DR: Modeling shows that the variation in gyrophase of 80 keV beam ions at the FILD aperture can produce an apparent measured energy signature spanning across 50-140 keV, which compares favorably with experiments in which neutral beam prompt loss provides a well known energy and pitch distribution.
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Radio frequency-driven energetic tritium ion tail measurements in the Tokamak Fusion Test Reactor using the pellet charge exchange diagnostic

TL;DR: In this article, the authors describe the status of the pellet charge exchange (PCX) diagnostic including a brief description of the measurement technique and discussion of operational experience, as well as measurements of the energy spectrum, radial density distribution, and heating deposition profile of rf-driven tritium ions during 2ΩT heating of L-mode plasmas are presented.