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Title: Prediction of nonlinear evolution character of energetic-particle-driven instabilities

Abstract

A general criterion is proposed and found to successfully predict the emergence of chirping oscillations of unstable Alfvénic eigenmodes in tokamak plasma experiments. The model includes realistic eigenfunction structure, detailed phase-space dependences of the instability drive, stochastic scattering and the Coulomb drag. The stochastic scattering combines the effects of collisional pitch angle scattering and micro-turbulence spatial diffusion. Furthermore, the latter mechanism is essential to accurately identify the transition between the fixed-frequency mode behavior and rapid chirping in tokamaks and to resolve the disparity with respect to chirping observation in spherical and conventional tokamaks.

Authors:
 [1];  [2];  [3];  [4];  [3];  [3];  [5];  [3];  [3];  [5]
  1. Univ. of Sao Paulo, Sao Paulo (Brazil); Princeton Univ., Princeton, NJ (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. Princeton Univ., Princeton, NJ (United States)
  4. Univ. of California, Irvine, CA (United States)
  5. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1375927
Alternate Identifier(s):
OSTI ID: 1420377
Grant/Contract Number:  
FC02-04ER54698; 2012/22830-2; 2014/03289-4; AC02-09CH11466
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 5; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; fast ions; non-linear dynamics; wave chirping; plasma instabilities

Citation Formats

Duarte, Vinicius N., Berk, H. L., Gorelenkov, N. N., Heidbrink, William W., Kramer, Gerrit J., Nazikian, Raffi, Pace, David C., Podesta, Mario, Tobias, Benjamin J., and Van Zeeland, Michael A. Prediction of nonlinear evolution character of energetic-particle-driven instabilities. United States: N. p., 2017. Web. doi:10.1088/1741-4326/aa6232.
Duarte, Vinicius N., Berk, H. L., Gorelenkov, N. N., Heidbrink, William W., Kramer, Gerrit J., Nazikian, Raffi, Pace, David C., Podesta, Mario, Tobias, Benjamin J., & Van Zeeland, Michael A. Prediction of nonlinear evolution character of energetic-particle-driven instabilities. United States. doi:10.1088/1741-4326/aa6232.
Duarte, Vinicius N., Berk, H. L., Gorelenkov, N. N., Heidbrink, William W., Kramer, Gerrit J., Nazikian, Raffi, Pace, David C., Podesta, Mario, Tobias, Benjamin J., and Van Zeeland, Michael A. Fri . "Prediction of nonlinear evolution character of energetic-particle-driven instabilities". United States. doi:10.1088/1741-4326/aa6232. https://www.osti.gov/servlets/purl/1375927.
@article{osti_1375927,
title = {Prediction of nonlinear evolution character of energetic-particle-driven instabilities},
author = {Duarte, Vinicius N. and Berk, H. L. and Gorelenkov, N. N. and Heidbrink, William W. and Kramer, Gerrit J. and Nazikian, Raffi and Pace, David C. and Podesta, Mario and Tobias, Benjamin J. and Van Zeeland, Michael A.},
abstractNote = {A general criterion is proposed and found to successfully predict the emergence of chirping oscillations of unstable Alfvénic eigenmodes in tokamak plasma experiments. The model includes realistic eigenfunction structure, detailed phase-space dependences of the instability drive, stochastic scattering and the Coulomb drag. The stochastic scattering combines the effects of collisional pitch angle scattering and micro-turbulence spatial diffusion. Furthermore, the latter mechanism is essential to accurately identify the transition between the fixed-frequency mode behavior and rapid chirping in tokamaks and to resolve the disparity with respect to chirping observation in spherical and conventional tokamaks.},
doi = {10.1088/1741-4326/aa6232},
journal = {Nuclear Fusion},
number = 5,
volume = 57,
place = {United States},
year = {Fri Mar 17 00:00:00 EDT 2017},
month = {Fri Mar 17 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 11 works
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