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]
Abstract
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.
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Univ. of California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1377834
- Alternate Identifier(s):
- OSTI ID: 1372589
- Grant/Contract Number:
- AC02-09CH11466; FG02-99ER54527
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 118; Journal Issue: 26; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; eigenmodes; tokamak; plasmas; waves; ions
Citation Formats
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., and Podesta, M. 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]. United States: N. p., 2017.
Web. doi:10.1103/PhysRevLett.118.265001.
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. 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]. United States. https://doi.org/10.1103/PhysRevLett.118.265001
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., and Podesta, M. Thu .
"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]". United States. https://doi.org/10.1103/PhysRevLett.118.265001. https://www.osti.gov/servlets/purl/1377834.
@article{osti_1377834,
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]},
author = {Fredrickson, E. D. and Belova, E. V. and Battaglia, D. J. and Bell, R. E. and Crocker, N. A. and Darrow, D. S. and Diallo, A. and Gerhardt, S. P. and Gorelenkov, N. N. and LeBlanc, B. P. and Podesta, M.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.118.265001},
journal = {Physical Review Letters},
number = 26,
volume = 118,
place = {United States},
year = {Thu Jun 29 00:00:00 EDT 2017},
month = {Thu Jun 29 00:00:00 EDT 2017}
}
Web of Science
Works referenced in this record:
The production of He-3 and heavy ion enrichment in He-3-rich flares by electromagnetic hydrogen cyclotron waves
journal, May 1992
- Temerin, M.; Roth, I.
- The Astrophysical Journal, Vol. 391
Excitation of global eigenmodes of the Alfven wave in Tokamaks
journal, September 1982
- Appert, K.; Gruber, R.; Troyuon, F.
- Plasma Physics, Vol. 24, Issue 9
High-frequency shear Alfvén instability driven by circulating energetic ions in NSTX
journal, December 2006
- Kolesnichenko, Ya. I.; White, R. B.; Yakovenko, Yu. V.
- Physics of Plasmas, Vol. 13, Issue 12
Wave dissipation by ion cyclotron resonance in the solar corona
journal, March 2001
- Tu, C. -Y.; Marsch, E.
- Astronomy & Astrophysics, Vol. 368, Issue 3
Destabilization of fast magnetoacoustic waves by circulating energetic ions in toroidal plasmas
journal, December 2003
- Belikov, V. S.; Kolesnichenko, Ya. I.; White, R. B.
- Physics of Plasmas, Vol. 10, Issue 12
Numerical study of tilt stability of prolate field-reversed configurations
journal, December 2000
- Belova, E. V.; Jardin, S. C.; Ji, H.
- Physics of Plasmas, Vol. 7, Issue 12
Progress toward commissioning and plasma operation in NSTX-U
journal, June 2015
- Ono, M.; Chrzanowski, J.; Dudek, L.
- Nuclear Fusion, Vol. 55, Issue 7
Alfven cyclotron instability and ion cyclotron emission
journal, December 1995
- Gorelenkov, N. N.; Cheng, C. Z.
- Nuclear Fusion, Vol. 35, Issue 12
Correlation between Electron Transport and Shear Alfvén Activity in the National Spherical Torus Experiment
journal, March 2009
- Stutman, D.; Delgado-Aparicio, L.; Gorelenkov, N.
- Physical Review Letters, Vol. 102, Issue 11
Observation of compressional Alfvén eigenmodes (CAE) in a conventional tokamak
journal, January 2006
- Heidbrink, W. W.; Fredrickson, E. D.; Gorelenkov, N. N.
- Nuclear Fusion, Vol. 46, Issue 2
Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor
journal, May 1997
- Chang, Z.; Nazikian, R.; Fu, G. -Y.
- Physics of Plasmas, Vol. 4, Issue 5
Nonlinear simulations of beam-driven compressional Alfvén eigenmodes in NSTX
journal, April 2017
- Belova, E. V.; Gorelenkov, N. N.; Crocker, N. A.
- Physics of Plasmas, Vol. 24, Issue 4
Generation of the fast solar wind: A review with emphasis on the resonant cyclotron interaction
journal, January 2002
- Hollweg, Joseph V.
- Journal of Geophysical Research, Vol. 107, Issue A7
Observation of global Alfvén eigenmode avalanche events on the National Spherical Torus Experiment
journal, March 2012
- Fredrickson, E. D.; Gorelenkov, N. N.; Belova, E.
- Nuclear Fusion, Vol. 52, Issue 4
Self-consistent equilibrium model of low aspect-ratio toroidal plasma with energetic beam ions
journal, August 2003
- Belova, E. V.; Gorelenkov, N. N.; Cheng, C. Z.
- Physics of Plasmas, Vol. 10, Issue 8
Theory and observations of high frequency Alfv n eigenmodes in low aspect ratio plasmas
journal, March 2003
- Gorelenkov, N. N.; Fredrickson, E.; Belova, E.
- Nuclear Fusion, Vol. 43, Issue 4
Suppression of Alfvén modes on NSTX-U with outboard beam injection
dataset, January 2017
- Fredrickson, E.; Belova, E.; Battaglia, D.
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Works referencing / citing this record:
Energetic-particle-modified global Alfvén eigenmodes
journal, April 2018
- Lestz, J. B.; Belova, E. V.; Gorelenkov, N. N.
- Physics of Plasmas, Vol. 25, Issue 4
Dynamic neutral beam current and voltage control to improve beam efficacy in tokamaks
journal, May 2018
- Austin, M. E.; Bardoczi, L.; Collins, C. S.
- Physics of Plasmas, Vol. 25, Issue 5
Integrated Tokamak modeling: When physics informs engineering and research planning
journal, May 2018
- Poli, Francesca Maria
- Physics of Plasmas, Vol. 25, Issue 5
Numerical simulations of global Alfvén eigenmodes excitation and stabilization in NSTX-U
journal, September 2019
- Belova, E. V.; Fredrickson, E. D.; Lestz, J. B.
- Physics of Plasmas, Vol. 26, Issue 9
Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. I. Interaction via ordinary and anomalous cyclotron resonances
journal, February 2020
- Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V.
- Physics of Plasmas, Vol. 27, Issue 2
Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance
journal, February 2020
- Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V.
- Physics of Plasmas, Vol. 27, Issue 2
Active control of Alfvén eigenmodes in magnetically confined toroidal plasmas
journal, March 2019
- Garcia-Munoz, M.; Sharapov, S. E.; Van Zeeland, M. A.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 5
Energetic ion losses ‘channeling’ mechanism and strategy for mitigation
journal, June 2019
- Nabais, F.; Bizarro, João P. S.; Borba, D.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 8
Scenario development during commissioning operations on the National Spherical Torus Experiment Upgrade
journal, February 2018
- Battaglia, D. J.; Boyer, M. D.; Gerhardt, S.
- Nuclear Fusion, Vol. 58, Issue 4
Global Alfvén eigenmode scaling and suppression: experiment and theory
journal, June 2018
- Fredrickson, E. D.; Belova, E. V.; Gorelenkov, N. N.
- Nuclear Fusion, Vol. 58, Issue 8
Active real-time control of Alfvén eigenmodes by neutral beam and electron cyclotron heating in the DIII-D tokamak
journal, September 2018
- Hu, Wenhui; Olofsson, K. E. J.; Welander, A. S.
- Nuclear Fusion, Vol. 58, Issue 12
NSTX/NSTX-U theory, modeling and analysis results
journal, June 2019
- Kaye, S. M.; Battaglia, D. J.; Baver, D.
- Nuclear Fusion, Vol. 59, Issue 11
Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
journal, March 2019
- Boyer, M. D.; Kaye, S.; Erickson, K.
- Nuclear Fusion, Vol. 59, Issue 5
Feedback control of stored energy and rotation with variable beam energy and perveance on DIII-D
journal, May 2019
- Boyer, M. D.; Erickson, K. G.; Grierson, B. A.
- Nuclear Fusion, Vol. 59, Issue 7
Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance
text, January 2019
- Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V.
- arXiv