Scintillator-based diagnostic for fast ion loss measurements on DIII-D

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3490020· OSTI ID:22058646

Fisher, R K; Van Zeeland, M A ^[1]; Pace, D C; Heidbrink, W W; Muscatello, C M; Zhu, Y B ^[2]; Garcia-Munoz, M ^[3]

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1. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
2. University of California-Irvine, Irvine, California 92167 (United States)
3. Max Planck-Institut fuer Plasmaphysik, Garching D-85748 (Germany)

A new scintillator-based fast ion loss detector has been installed on DIII-D with the time response (>100 kHz) needed to study energetic ion losses induced by Alfven eigenmodes and other MHD instabilities. Based on the design used on ASDEX Upgrade, the diagnostic measures the pitch angle and gyroradius of ion losses based on the position of the ions striking the two-dimensional scintillator. For fast time response measurements, a beam splitter and fiberoptics couple a portion of the scintillator light to a photomultiplier. Reverse orbit following techniques trace the lost ions to their possible origin within the plasma. Initial DIII-D results showing prompt losses and energetic ion loss due to MHD instabilities are discussed.

• OSTI ID: 22058646
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALFVEN WAVES
ASDEX TOKAMAK
BEAM SPLITTING
DESIGN
DOUBLET-3 DEVICE
FIBER OPTICS
INCLINATION
KHZ RANGE
MAGNETOHYDRODYNAMICS
ORBITS
PHOTOMULTIPLIERS
PLASMA
PLASMA INSTABILITY
SCINTILLATION COUNTERS
TAIL IONS