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Title: Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration

Abstract

Gyrokinetic simulations of long wavelength ion temperature gradient (ITG) turbulence in the scrape-off layer (SOL) of a field-reversed configuration (FRC) find that zonal flows are nonlinearly generated and are the dominant mechanism for the nonlinear saturation of the ITG instability. After the ITG saturation, zonal flows remain undamped and gradually suppress the turbulent transport to a very low level. In the simulations with collisions, collisional damping gradually reduces zonal flow amplitude to a lower level, which allows finite ITG turbulence intensity and ion heat transport in the SOL. The steady state turbulence intensity and ion heat transport are found to be proportional to the collision frequency. Furthermore, this favorable scaling suggests that minimizing collisions (e.g. increasing temperature, reducing impurity content, etc) and preserving toroidal symmetry could improve plasma confinement in the FRC.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [2];  [1];  [3]
+ Show Author Affiliations
  1. University of California, Irvine, CA (United States)
  2. TAE Technologies, Inc., Foothill Ranch, CA (United States)
  3. University of California, Irvine, CA (United States); TAE Technologies, Inc., Foothill Ranch, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)
OSTI Identifier:
1982468
Grant/Contract Number:  
AC02-05CH11231; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 61; Journal Issue: 12; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics; zonal flow; field-reversed configuration; ITG mode; turbulent transport

Citation Formats

Wei, X. S., Wang, W. H., Lin, Z., Choi, G. J., Dettrick, S., Lau, C., Liu, P. F., and Tajima, T. Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration. United States: N. p., 2021. Web. doi:10.1088/1741-4326/ac3023.
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Wei, X. S., Wang, W. H., Lin, Z., Choi, G. J., Dettrick, S., Lau, C., Liu, P. F., & Tajima, T. Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration. United States. https://doi.org/10.1088/1741-4326/ac3023
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Wei, X. S., Wang, W. H., Lin, Z., Choi, G. J., Dettrick, S., Lau, C., Liu, P. F., and Tajima, T. Wed . "Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration". United States. https://doi.org/10.1088/1741-4326/ac3023. https://www.osti.gov/servlets/purl/1982468.
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@article{osti_1982468,
title = {Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration},
author = {Wei, X. S. and Wang, W. H. and Lin, Z. and Choi, G. J. and Dettrick, S. and Lau, C. and Liu, P. F. and Tajima, T.},
abstractNote = {Gyrokinetic simulations of long wavelength ion temperature gradient (ITG) turbulence in the scrape-off layer (SOL) of a field-reversed configuration (FRC) find that zonal flows are nonlinearly generated and are the dominant mechanism for the nonlinear saturation of the ITG instability. After the ITG saturation, zonal flows remain undamped and gradually suppress the turbulent transport to a very low level. In the simulations with collisions, collisional damping gradually reduces zonal flow amplitude to a lower level, which allows finite ITG turbulence intensity and ion heat transport in the SOL. The steady state turbulence intensity and ion heat transport are found to be proportional to the collision frequency. Furthermore, this favorable scaling suggests that minimizing collisions (e.g. increasing temperature, reducing impurity content, etc) and preserving toroidal symmetry could improve plasma confinement in the FRC.},
doi = {10.1088/1741-4326/ac3023},
journal = {Nuclear Fusion},
number = 12,
volume = 61,
place = {United States},
year = {Wed Nov 10 00:00:00 EST 2021},
month = {Wed Nov 10 00:00:00 EST 2021}
}
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https://doi.org/10.1088/1741-4326/ac3023
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Works referenced in this record:

Electrostatic quasi-neutral formulation of global cross-separatrix particle simulation in field-reversed configuration geometry
journal, August 2020

  • Lau, C. K.; Fulton, D. P.; Bao, J.
  • Physics of Plasmas, Vol. 27, Issue 8
  • DOI: 10.1063/5.0012439

One-Dimensional Model of a Lorentz Plasma
journal, January 1967

Generalized weighting scheme for δ f particle‐simulation method
journal, April 1994

  • Hu, Genze; Krommes, John A.
  • Physics of Plasmas, Vol. 1, Issue 4
  • DOI: 10.1063/1.870745

Theory of self‐organized critical transport in tokamak plasmas
journal, April 1996

  • Kishimoto, Y.; Tajima, T.; Horton, W.
  • Physics of Plasmas, Vol. 3, Issue 4
  • DOI: 10.1063/1.871754

Suppressed ion-scale turbulence in a hot high-β plasma
journal, December 2016

  • Schmitz, L.; Fulton, D. P.; Ruskov, E.
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms13860

Global simulation of ion temperature gradient instabilities in a field-reversed configuration
journal, April 2019

  • Bao, J.; Lau, C. K.; Lin, Z.
  • Physics of Plasmas, Vol. 26, Issue 4
  • DOI: 10.1063/1.5087079

Self-organization of electrostatic turbulence in a cylindrical plasma
journal, October 1987

Dynamics of axisymmetric and poloidal flows in tokamaks
journal, January 1999

Gyrokinetic particle simulation of a field reversed configuration
journal, January 2016

  • Fulton, D. P.; Lau, C. K.; Holod, I.
  • Physics of Plasmas, Vol. 23, Issue 1
  • DOI: 10.1063/1.4930289

Gyrokinetic particle simulation of neoclassical transport
journal, August 1995

  • Lin, Z.; Tang, W. M.; Lee, W. W.
  • Physics of Plasmas, Vol. 2, Issue 8
  • DOI: 10.1063/1.871196

Zonal flows in plasma—a review
journal, April 2005

Method for solving the gyrokinetic Poisson equation in general geometry
journal, November 1995

Turbulence spreading and transport scaling in global gyrokinetic particle simulations
journal, March 2004

Colliding Beam Fusion Reactor
journal, November 1997

Achieving a long-lived high-beta plasma state by energetic beam injection
journal, April 2015

  • Guo, H. Y.; Binderbauer, M. W.; Tajima, T.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms7897

Achievement of field-reversed configuration plasma sustainment via 10 MW neutral-beam injection on the C-2U device
journal, August 2017

Pseudo-three-dimensional turbulence in magnetized nonuniform plasma
journal, January 1978

  • Hasegawa, Akira; Mima, Kunioki
  • Physics of Fluids, Vol. 21, Issue 1
  • DOI: 10.1063/1.862083

A high performance field-reversed configurationa)
journal, May 2015

  • Binderbauer, M. W.; Tajima, T.; Steinhauer, L. C.
  • Physics of Plasmas, Vol. 22, Issue 5
  • DOI: 10.1063/1.4920950

Cross-separatrix simulations of turbulent transport in the field-reversed configuration
journal, May 2019

Plasma equilibria with multiple ion species: Equations and algorithm
journal, August 2011

  • Galeotti, L.; Barnes, D. C.; Ceccherini, F.
  • Physics of Plasmas, Vol. 18, Issue 8
  • DOI: 10.1063/1.3625275

A fully nonlinear characteristic method for gyrokinetic simulation
journal, January 1993

  • Parker, S. E.; Lee, W. W.
  • Physics of Fluids B: Plasma Physics, Vol. 5, Issue 1
  • DOI: 10.1063/1.860870

Toroidal drift modes driven by ion pressure gradients
journal, January 1981

Drift-wave stability in the field-reversed configuration
journal, August 2017

  • Lau, C. K.; Fulton, D. P.; Holod, I.
  • Physics of Plasmas, Vol. 24, Issue 8
  • DOI: 10.1063/1.4993630

Gyrokinetic simulation of driftwave instability in field-reversed configuration
journal, May 2016

  • Fulton, D. P.; Lau, C. K.; Schmitz, L.
  • Physics of Plasmas, Vol. 23, Issue 5
  • DOI: 10.1063/1.4948285

Gyrokinetic particle simulation model
journal, September 1987

Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations
journal, September 1998

Partially Linearized Algorithms in Gyrokinetic Particle Simulation
journal, August 1993

Effects of Collisional Zonal Flow Damping on Turbulent Transport
journal, November 1999

Excitation of zonal flow by drift waves in toroidal plasmas
journal, August 2000

  • Chen, Liu; Lin, Zhihong; White, Roscoe
  • Physics of Plasmas, Vol. 7, Issue 8
  • DOI: 10.1063/1.874222

The dependence of H-mode energy confinement and transport on collisionality in NSTX
journal, April 2013

Shearing rate of time-dependent E×B flow
journal, March 1999

  • Hahm, T. S.; Beer, M. A.; Lin, Z.
  • Physics of Plasmas, Vol. 6, Issue 3
  • DOI: 10.1063/1.873331

Gyrokinetic particle simulation of microturbulence for general magnetic geometry and experimental profiles
journal, February 2015

  • Xiao, Yong; Holod, Ihor; Wang, Zhixuan
  • Physics of Plasmas, Vol. 22, Issue 2
  • DOI: 10.1063/1.4908275

Comparisons and physics basis of tokamak transport models and turbulence simulations
journal, March 2000

  • Dimits, A. M.; Bateman, G.; Beer, M. A.
  • Physics of Plasmas, Vol. 7, Issue 3
  • DOI: 10.1063/1.873896

Field reversed configurations
journal, November 1988

Effects of equilibrium radial electric field on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration
journal, April 2021

Formation of hot, stable, long-lived field-reversed configuration plasmas on the C-2W device
journal, June 2019

Role of stable modes in zonal flow regulated turbulence
journal, June 2012

  • Makwana, K. D.; Terry, P. W.; Kim, J. -H.
  • Physics of Plasmas, Vol. 19, Issue 6
  • DOI: 10.1063/1.4729906

Theory of ITG turbulent saturation in stellarators: Identifying mechanisms to reduce turbulent transport
journal, February 2018

  • Hegna, C. C.; Terry, P. W.; Faber, B. J.
  • Physics of Plasmas, Vol. 25, Issue 2
  • DOI: 10.1063/1.5018198
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