Dielectric tensor expression for non-Maxwellian distribution functions and applications to α-particle damping in ICRH

R. Koch

doi:10.1016/0375-9601(91)90877-B

Dielectric tensor expression for non-Maxwellian distribution functions and applications to α-particle damping in ICRH

R. Koch

Laboratory for Plasma Physics

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

Abstract

A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.

Original language	English
Pages (from-to)	399-405
Number of pages	7
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	157
Issue number	6-7
DOIs	https://doi.org/10.1016/0375-9601(91)90877-B
Publication status	Published - 5 Aug 1991

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title = "Dielectric tensor expression for non-Maxwellian distribution functions and applications to α-particle damping in ICRH",

abstract = "A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.",

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year = "1991",

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doi = "10.1016/0375-9601(91)90877-B",

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N2 - A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.

AB - A general expression of the dielectric tensor of a non-Maxwellian plasma is derived. Parasitic damping of the fast wave by fusion-generated alpha particles in ion cyclotron heating scenarios is investigated using a realistic slowing down distribution function. This indicates that despite the large birth velocity of α-particles their cyclotron damping is as small as the one of an equivalent Maxwellian with the temperature of 0.6 MeV. This reduces significantly the impact of α-particle absorption on the fundamental D and second harmonic T scenarios in D-T plasmas.

UR - https://www.scopus.com/pages/publications/0000604778

U2 - 10.1016/0375-9601(91)90877-B

DO - 10.1016/0375-9601(91)90877-B

M3 - Article

AN - SCOPUS:0000604778

SN - 0375-9601

VL - 157

SP - 399

EP - 405

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 6-7

ER -

Dielectric tensor expression for non-Maxwellian distribution functions and applications to α-particle damping in ICRH

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