Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak
Abstract
A new non-linear feature has been observed in fast-ion loss from tokamak plasmas in the form of oscillations at the sum, difference and second harmonic frequencies of two independent Alfvén eigenmodes (AEs). Full orbit calculations and analytic theory indicate this non-linearity is due to coupling of fast-ion orbital response as it passes through each AE — a change in wave-particle phase k • r by one mode alters the force exerted by the next. Furthermore, the loss measurement is of barely confined, non-resonant particles, while similar non-linear interactions can occur between well-confined particles and multiple AEs leading to enhanced fast-ion transport.
- Authors:
-
- Univ. of California, Irvine, CA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1353060
- Grant/Contract Number:
- FC02-04ER54698
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 8; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; non-linear; energetic particles; multi-wave particle interactions
Citation Formats
Chen, Xi, Kramer, Gerrit J., Heidbrink, William W., Fisher, Raymond K., Pace, David C., Petty, Craig C., Podesta, Mario L., and Van Zeeland, Michael A. Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak. United States: N. p., 2014.
Web. doi:10.1088/0029-5515/54/8/083005.
Chen, Xi, Kramer, Gerrit J., Heidbrink, William W., Fisher, Raymond K., Pace, David C., Petty, Craig C., Podesta, Mario L., & Van Zeeland, Michael A. Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak. United States. https://doi.org/10.1088/0029-5515/54/8/083005
Chen, Xi, Kramer, Gerrit J., Heidbrink, William W., Fisher, Raymond K., Pace, David C., Petty, Craig C., Podesta, Mario L., and Van Zeeland, Michael A. Wed .
"Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak". United States. https://doi.org/10.1088/0029-5515/54/8/083005. https://www.osti.gov/servlets/purl/1353060.
@article{osti_1353060,
title = {Non-linear wave-particle interactions and fast ion loss induced by multiple Alfvén eigenmodes in the DIII-D tokamak},
author = {Chen, Xi and Kramer, Gerrit J. and Heidbrink, William W. and Fisher, Raymond K. and Pace, David C. and Petty, Craig C. and Podesta, Mario L. and Van Zeeland, Michael A.},
abstractNote = {A new non-linear feature has been observed in fast-ion loss from tokamak plasmas in the form of oscillations at the sum, difference and second harmonic frequencies of two independent Alfvén eigenmodes (AEs). Full orbit calculations and analytic theory indicate this non-linearity is due to coupling of fast-ion orbital response as it passes through each AE — a change in wave-particle phase k • r by one mode alters the force exerted by the next. Furthermore, the loss measurement is of barely confined, non-resonant particles, while similar non-linear interactions can occur between well-confined particles and multiple AEs leading to enhanced fast-ion transport.},
doi = {10.1088/0029-5515/54/8/083005},
journal = {Nuclear Fusion},
number = 8,
volume = 54,
place = {United States},
year = {Wed May 21 00:00:00 EDT 2014},
month = {Wed May 21 00:00:00 EDT 2014}
}
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Works referencing / citing this record:
Diverse wave-particle interactions for energetic ions that traverse Alfvén eigenmodes on their first full orbit
journal, February 2016
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