Doppler-shifted cyclotron resonance of fast ions with circularly polarized shear Alfven waves

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3103813· OSTI ID:21277143

Yang, Zhang; Heidbrink, W W; Shu, Zhou; Boehmer, H; McWilliams, R ^[1]; Carter, T A; Vincena, S ^[2]; Lilley, M K ^[3]

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1. Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
2. Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States)
3. Department of Physics, Imperial College London, London, SW7 2AZ (United Kingdom)

The Doppler-shifted cyclotron resonance between fast ions and shear Alfven waves (SAWs) has been experimentally investigated with a test-particle fast-ion (Li{sup +}) beam launched in the helium plasma of the Large Plasma Device [Gekelman et al., Rev. Sci. Instrum. 62, 2875 (1991)]. Left- or right-hand circularly polarized SAWs are launched by an antenna with four current channels. A collimated fast-ion energy analyzer characterizes the resonance by measuring the nonclassical spreading of the averaged beam signal. Left-hand circularly polarized SAWs resonate with the fast ions but right-hand circularly polarized SAWs do not. The measured fast-ion profiles are compared with simulations by a Monte Carlo Lorentz code that uses the measured wave field data.

• OSTI ID: 21277143
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
ANTENNAS
CYCLOTRON RESONANCE
DOPPLER EFFECT
HELIUM
LITHIUM IONS
MONTE CARLO METHOD
PLASMA
SHEAR