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

Yang Zhang; W. W. Heidbrink; Shu Zhou; H. Boehmer; R. McWilliams; T. A. Carter; S. Vincena; M. K. Lilley

doi:10.1063/1.3103813

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

Yang Zhang, W. W. Heidbrink, Shu Zhou, H. Boehmer, R. McWilliams, T. A. Carter, S. Vincena, M. K. Lilley

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The Doppler-shifted cyclotron resonance between fast ions and shear Alfv́n waves (SAWs) has been experimentally investigated with a test-particle fast-ion (Li⁺) beam launched in the helium plasma of the Large Plasma Device [Gekelman, 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.

Original language	English
Article number	055706
Journal	Physics of Plasmas
Volume	16
Issue number	5
DOIs	https://doi.org/10.1063/1.3103813
State	Published - 2009
Externally published	Yes

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title = "Doppler-shifted cyclotron resonance of fast ions with circularly polarized shear Alfv{\'e}n waves",

abstract = "The Doppler-shifted cyclotron resonance between fast ions and shear Alf{\'v}n waves (SAWs) has been experimentally investigated with a test-particle fast-ion (Li+) beam launched in the helium plasma of the Large Plasma Device [Gekelman, 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.",

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T1 - Doppler-shifted cyclotron resonance of fast ions with circularly polarized shear Alfvén waves

AU - Zhang, Yang

AU - Heidbrink, W. W.

AU - Zhou, Shu

AU - Boehmer, H.

AU - McWilliams, R.

AU - Carter, T. A.

AU - Vincena, S.

AU - Lilley, M. K.

PY - 2009

Y1 - 2009

N2 - The Doppler-shifted cyclotron resonance between fast ions and shear Alfv́n waves (SAWs) has been experimentally investigated with a test-particle fast-ion (Li+) beam launched in the helium plasma of the Large Plasma Device [Gekelman, 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.

AB - The Doppler-shifted cyclotron resonance between fast ions and shear Alfv́n waves (SAWs) has been experimentally investigated with a test-particle fast-ion (Li+) beam launched in the helium plasma of the Large Plasma Device [Gekelman, 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.

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DO - 10.1063/1.3103813

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JO - Physics of Plasmas

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ER -

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

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