Pushing Particles with Waves: Current Drive and α-Channeling
Abstract
It can be advantageous to push particles with waves in tokamaks or other magnetic confinement devices, relying on wave-particle resonances to accomplish specific goals. Waves that damp on electrons or ions in toroidal fusion devises can drive currents if the waves are launched with toroidal asymmetry. Theses currents are important for tokamaks, since they operate in the absence of an electric field with curl, enabling steady state operation. The lower hybrid wave and the electron cyclotron wave have been demonstrated to drive significant currents. Non-inductive current also stabilizes deleterious tearing modes. Waves can also be used to broker the energy transfer between energetic alpha particles and the background plasma. Alpha particles born through fusion reactions in a tokamak reactor tend to slow down on electrons, but that could take up to hundreds of milliseconds. Before that happens, the energy in these alpha particles can destabilize on collisionless timescales toroidal Alfven modes and other waves, in a way deleterious to energy confinement. However, it has been speculated that this energy might be instead be channeled instead into useful energy, that heats fuel ions or drives current. Furthermore, an important question is the extent to which these effects can be accomplished together.
- Authors:
-
- Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1414919
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma and Fusion Research
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 0; Journal ID: ISSN 1880-6821
- Publisher:
- Japan Society of Plasma Science and Nuclear Fusion Research
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; noninductive current drive; alpha channeling; phase-space engineering; LHCD; ECCD
Citation Formats
FISCH, Nathaniel J. Pushing Particles with Waves: Current Drive and α-Channeling. United States: N. p., 2016.
Web. doi:10.1585/pfr.11.2101010.
FISCH, Nathaniel J. Pushing Particles with Waves: Current Drive and α-Channeling. United States. https://doi.org/10.1585/pfr.11.2101010
FISCH, Nathaniel J. Fri .
"Pushing Particles with Waves: Current Drive and α-Channeling". United States. https://doi.org/10.1585/pfr.11.2101010. https://www.osti.gov/servlets/purl/1414919.
@article{osti_1414919,
title = {Pushing Particles with Waves: Current Drive and α-Channeling},
author = {FISCH, Nathaniel J.},
abstractNote = {It can be advantageous to push particles with waves in tokamaks or other magnetic confinement devices, relying on wave-particle resonances to accomplish specific goals. Waves that damp on electrons or ions in toroidal fusion devises can drive currents if the waves are launched with toroidal asymmetry. Theses currents are important for tokamaks, since they operate in the absence of an electric field with curl, enabling steady state operation. The lower hybrid wave and the electron cyclotron wave have been demonstrated to drive significant currents. Non-inductive current also stabilizes deleterious tearing modes. Waves can also be used to broker the energy transfer between energetic alpha particles and the background plasma. Alpha particles born through fusion reactions in a tokamak reactor tend to slow down on electrons, but that could take up to hundreds of milliseconds. Before that happens, the energy in these alpha particles can destabilize on collisionless timescales toroidal Alfven modes and other waves, in a way deleterious to energy confinement. However, it has been speculated that this energy might be instead be channeled instead into useful energy, that heats fuel ions or drives current. Furthermore, an important question is the extent to which these effects can be accomplished together.},
doi = {10.1585/pfr.11.2101010},
journal = {Plasma and Fusion Research},
number = 0,
volume = 11,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2016},
month = {Fri Jan 01 00:00:00 EST 2016}
}
Search WorldCat to find libraries that may hold this journalWorks referencing / citing this record:
Interpreting observations of ion cyclotron emission from large helical device plasmas with beam-injected ion populations
journal, July 2019
- Reman, B. C. G.; Dendy, R. O.; Akiyama, T.
- Nuclear Fusion, Vol. 59, Issue 9