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Title: Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak

Abstract

A small nonaxisymmetric (3D) magnetic field can induce nonambipolar transport of the particle species confined in a tokamak and thus a significant change of plasma rotation. This process can be in a favor of instability control in the region where the tokamak plasma is sufficiently collisional and resistive, as observed in the applications of $n$ = 1 resonant magnetic perturbations to the KSTAR tokamak. The plasma rotation can be globally accelerated due to radially drifting electrons and constrained to the electron root, if the radial transport is enhanced by an amplified 3D response. Interestingly, this mechanism is verified by a kinetically self-consistent magnetohydrodynamic modeling for both response and transport, which offers the quantitative explanations on the internal $n$ = 1 structure detected by electron-cyclotron-emission imaging and the cocurrent plasma spinning observed in the experiments.

Authors:
 [1];  [2];  [1];  [2];  [3];  [4];  [3];  [3];  [1]
  1. Seoul National Univ., Seoul (Republic of Korea). Dept. of Nuclear Engineering
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. National Fusion Research Inst., Daejeon (Republic of Korea)
  4. Ulsan National Inst. of Science and Technology, Ulsan (Republic of Korea)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1562293
Alternate Identifier(s):
OSTI ID: 1559389
Grant/Contract Number:  
AC02-76CH03073 (PPPL)
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Yang, S. M., Park, J. -K., Na, Yong-Su, Wang, Z. R., Ko, W. H., In, Y., Lee, J. H., Lee, K. D., and Kim, S. K. Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.095001.
Yang, S. M., Park, J. -K., Na, Yong-Su, Wang, Z. R., Ko, W. H., In, Y., Lee, J. H., Lee, K. D., & Kim, S. K. Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak. United States. doi:10.1103/PhysRevLett.123.095001.
Yang, S. M., Park, J. -K., Na, Yong-Su, Wang, Z. R., Ko, W. H., In, Y., Lee, J. H., Lee, K. D., and Kim, S. K. Thu . "Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak". United States. doi:10.1103/PhysRevLett.123.095001.
@article{osti_1562293,
title = {Nonambipolar Transport due to Electrons with 3D Resistive Response in the KSTAR Tokamak},
author = {Yang, S. M. and Park, J. -K. and Na, Yong-Su and Wang, Z. R. and Ko, W. H. and In, Y. and Lee, J. H. and Lee, K. D. and Kim, S. K.},
abstractNote = {A small nonaxisymmetric (3D) magnetic field can induce nonambipolar transport of the particle species confined in a tokamak and thus a significant change of plasma rotation. This process can be in a favor of instability control in the region where the tokamak plasma is sufficiently collisional and resistive, as observed in the applications of $n$ = 1 resonant magnetic perturbations to the KSTAR tokamak. The plasma rotation can be globally accelerated due to radially drifting electrons and constrained to the electron root, if the radial transport is enhanced by an amplified 3D response. Interestingly, this mechanism is verified by a kinetically self-consistent magnetohydrodynamic modeling for both response and transport, which offers the quantitative explanations on the internal $n$ = 1 structure detected by electron-cyclotron-emission imaging and the cocurrent plasma spinning observed in the experiments.},
doi = {10.1103/PhysRevLett.123.095001},
journal = {Physical Review Letters},
number = 9,
volume = 123,
place = {United States},
year = {2019},
month = {8}
}

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