Collisional dependence of Alfvén mode saturation in tokamaks

Zhou, Muni; White, Roscoe

doi:10.1088/0741-3335/58/12/125006

Collisional dependence of Alfvén mode saturation in tokamaks

Journal Article · Wed Oct 26 00:00:00 EDT 2016 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/58/12/125006· OSTI ID:1352910

Zhou, Muni ^[1]; White, Roscoe ^[2]

Zhejiang Univ., Hangzhou (People's Republic of China)
Princeton Univ., Princeton, NJ (United States). Plasma Physics Lab.

Saturation of Alfvén modes driven unstable by a distribution of high energy particles as a function of collisionality is investigated with a guiding center code, using numerical eigenfunctions produced by linear theory and numerical high energy particle distributions. The most important resonance is found and it is shown that when the resonance domain is bounded, not allowing particles to collisionlessly escape, the saturation amplitude is given by the balance of the resonance mixing time with the time for nearby particles to collisionally diffuse across the resonance width. Finally, saturation amplitudes are in agreement with theoretical predictions as long as the mode amplitude is not so large that it produces stochastic loss from the resonance domain.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1352910

Alternate ID(s):: OSTI ID: 1330109
OSTI ID: 22716381

Report Number(s):: PPPL--5256

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 12 Vol. 58; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Collisional dependence of Alfven mode saturation in tokamaks Zhou, M.; White, R. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562037	dataset	January 2016
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Cited By (6)

Collisional dependence of Alfven mode saturation in tokamaks Zhou, M.; White, R. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1367170	dataset	January 2016
Resonances between high energy particles and ideal magnetohydrodynamic modes in tokamaks White, R. B.; Gorelenkov, N. N.; Duarte, V. N. Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5046655	journal	October 2018
Collisional enhancement of energetic particle Alfvénic resonance width in tokamaks White, R. B.; Duarte, V. N.; Gorelenkov, N. N. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5088598	journal	March 2019
A simple model for perturbative kinetic particle resonances in tokamaks White, R. B.; Duarte, V. N. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5092965	journal	April 2019
Modeling of chirping toroidal Alfvén eigenmodes in NSTX White, R. B.; Duarte, V. N.; Gorelenkov, N. N. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5115399	journal	September 2019
Collisional dependence of Alfven mode saturation in tokamaks Zhou, M.; White, R. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562037	dataset	January 2016

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