Experiments on ion cyclotron damping at the deuterium fourth harmonic in DIII-D

Journal Article · Mon Sep 20 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59723· OSTI ID:20216687

Pinsker, R I ^[1]; Baity, F W ^[2]; Bernabei, S ^[3]; Greenough, N ^[3]; Heidbrink, W W ^[4]; Mau, T K ^[5]; Petty, C C ^[1]; Porkolab, M ^[6]

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1. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
3. Princeton Plasma Physics Laboratory, Princeton, New Jersey (United States)
4. University of California, Irvine, California (United States)
5. University of California, San Diego, California (United States)
6. Massachusetts Institute of Technology, Cambridge, Massachusetts (United States)

Absorption of fast Alfven waves by the energetic ions of an injected beam is evaluated in the DIII-D tokamak. Ion cyclotron resonance absorption at the fourth harmonic of the deuteron cyclotron frequency is observed with deuterium neutral beam injection (f=60 MHz, B{sub T}=1.9 T). Enhanced D-D neutron rates are evidence of absorption at the Doppler-shifted cyclotron resonance. Characteristics of global energy confinement provide further proof of substantial beam acceleration by the rf. In many cases, the accelerated deuterons cause temporary stabilization of the sawtooth (''monster sawteeth''), at relatively low rf power levels of {approx}1 MW. (c) 1999 American Institute of Physics.

• OSTI ID: 20216687
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 485; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
ICR HEATING
POWER RANGE 01-10 MW
SAWTOOTH OSCILLATIONS
TOKAMAK TYPE REACTORS