Suppression of Alfven Modes on the National Spherical Torus Experiment Upgrade with Outboard Beam Injection [Suppression of Alfven Modes on the NSTX-U with Outboard Beam Injection]

Fredrickson, E. D.; Belova, E. V.; Battaglia, D. J.; Bell, R. E.; Crocker, N. A.; Darrow, D. S.; Diallo, A.; Gerhardt, S. P.; Gorelenkov, N. N.; LeBlanc, B. P.; Podesta, M.

doi:10.1103/PhysRevLett.118.265001

Title: Suppression of Alfven Modes on the National Spherical Torus Experiment Upgrade with Outboard Beam Injection [Suppression of Alfven Modes on the NSTX-U with Outboard Beam Injection]

Journal Article · Thu Jun 29 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.265001· OSTI ID:1377834

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Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Univ. of California, Los Angeles, CA (United States)

In this paper we present data from experiments on the National Spherical Torus Experiment Upgrade, where it is shown for the first time that small amounts of high pitch-angle beam ions can strongly suppress the counterpropagating global Alfven eigenmodes (GAE). GAE have been implicated in the redistribution of fast ions and modification of the electron power balance in previous experiments on NSTX. The ability to predict the stability of Alfven modes, and developing methods to control them, is important for fusion reactors like the International Tokamak Experimental Reactor, which are heated by a large population of nonthermal, super-Alfvenic ions consisting of fusion generated alpha's and beam ions injected for current profile control. We present a qualitative interpretation of these observations using an analytic model of the Doppler-shifted ion-cyclotron resonance drive responsible for GAE instability which has an important dependence on k(perpendicular to rho L). A quantitative analysis of this data with the HYM stability code predicts both the frequencies and instability of the GAE prior to, and suppression of the GAE after the injection of high pitch-angle beam ions.

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC02-09CH11466; FG02-99ER54527

OSTI ID:: 1377834

Alternate ID(s):: OSTI ID: 1372589

Journal Information:: Physical Review Letters, Vol. 118, Issue 26; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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References (17)

The production of He-3 and heavy ion enrichment in He-3-rich flares by electromagnetic hydrogen cyclotron waves Temerin, M.; Roth, I. The Astrophysical Journal, Vol. 391 https://doi.org/10.1086/186408	journal	May 1992
Excitation of global eigenmodes of the Alfven wave in Tokamaks Appert, K.; Gruber, R.; Troyuon, F. Plasma Physics, Vol. 24, Issue 9 https://doi.org/10.1088/0032-1028/24/9/010	journal	September 1982
High-frequency shear Alfvén instability driven by circulating energetic ions in NSTX Kolesnichenko, Ya. I.; White, R. B.; Yakovenko, Yu. V. Physics of Plasmas, Vol. 13, Issue 12 https://doi.org/10.1063/1.2402129	journal	December 2006
Wave dissipation by ion cyclotron resonance in the solar corona Tu, C. -Y.; Marsch, E. Astronomy & Astrophysics, Vol. 368, Issue 3 https://doi.org/10.1051/0004-6361:20010019	journal	March 2001
Destabilization of fast magnetoacoustic waves by circulating energetic ions in toroidal plasmas Belikov, V. S.; Kolesnichenko, Ya. I.; White, R. B. Physics of Plasmas, Vol. 10, Issue 12 https://doi.org/10.1063/1.1625375	journal	December 2003
Numerical study of tilt stability of prolate field-reversed configurations Belova, E. V.; Jardin, S. C.; Ji, H. Physics of Plasmas, Vol. 7, Issue 12 https://doi.org/10.1063/1.1318929	journal	December 2000
Progress toward commissioning and plasma operation in NSTX-U Ono, M.; Chrzanowski, J.; Dudek, L. Nuclear Fusion, Vol. 55, Issue 7 https://doi.org/10.1088/0029-5515/55/7/073007	journal	June 2015
Alfven cyclotron instability and ion cyclotron emission Gorelenkov, N. N.; Cheng, C. Z. Nuclear Fusion, Vol. 35, Issue 12 https://doi.org/10.1088/0029-5515/35/12/I39	journal	December 1995
Correlation between Electron Transport and Shear Alfvén Activity in the National Spherical Torus Experiment Stutman, D.; Delgado-Aparicio, L.; Gorelenkov, N. Physical Review Letters, Vol. 102, Issue 11 https://doi.org/10.1103/PhysRevLett.102.115002	journal	March 2009
Observation of compressional Alfvén eigenmodes (CAE) in a conventional tokamak Heidbrink, W. W.; Fredrickson, E. D.; Gorelenkov, N. N. Nuclear Fusion, Vol. 46, Issue 2 https://doi.org/10.1088/0029-5515/46/2/016	journal	January 2006
Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor Chang, Z.; Nazikian, R.; Fu, G. -Y. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872363	journal	May 1997
Nonlinear simulations of beam-driven compressional Alfvén eigenmodes in NSTX Belova, E. V.; Gorelenkov, N. N.; Crocker, N. A. Physics of Plasmas, Vol. 24, Issue 4 https://doi.org/10.1063/1.4979278	journal	April 2017
Generation of the fast solar wind: A review with emphasis on the resonant cyclotron interaction Hollweg, Joseph V. Journal of Geophysical Research, Vol. 107, Issue A7 https://doi.org/10.1029/2001JA000270	journal	January 2002
Observation of global Alfvén eigenmode avalanche events on the National Spherical Torus Experiment Fredrickson, E. D.; Gorelenkov, N. N.; Belova, E. Nuclear Fusion, Vol. 52, Issue 4 https://doi.org/10.1088/0029-5515/52/4/043001	journal	March 2012
Self-consistent equilibrium model of low aspect-ratio toroidal plasma with energetic beam ions Belova, E. V.; Gorelenkov, N. N.; Cheng, C. Z. Physics of Plasmas, Vol. 10, Issue 8 https://doi.org/10.1063/1.1592155	journal	August 2003
Theory and observations of high frequency Alfv n eigenmodes in low aspect ratio plasmas Gorelenkov, N. N.; Fredrickson, E.; Belova, E. Nuclear Fusion, Vol. 43, Issue 4 https://doi.org/10.1088/0029-5515/43/4/302	journal	March 2003
Suppression of Alfvén modes on NSTX-U with outboard beam injection Fredrickson, E.; Belova, E.; Battaglia, D. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562055	dataset	January 2017

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Dynamic neutral beam current and voltage control to improve beam efficacy in tokamaks Austin, M. E.; Bardoczi, L.; Collins, C. S. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5016160	journal	May 2018
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Global Alfvén eigenmode scaling and suppression: experiment and theory Fredrickson, E. D.; Belova, E. V.; Gorelenkov, N. N. Nuclear Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/1741-4326/aac64c	journal	June 2018
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Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V. arXiv https://doi.org/10.48550/arxiv.1909.05465	text	January 2019

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Title: Suppression of Alfven Modes on the National Spherical Torus Experiment Upgrade with Outboard Beam Injection [Suppression of Alfven Modes on the NSTX-U with Outboard Beam Injection]

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