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Title: Kinetic particle simulations in a global toroidal geometry

Abstract

The gyrokinetic toroidal code has been upgraded for global simulations by coupling the core and scrape-off layer regions across the separatrix with field-aligned particle-grid interpolations. A fully kinetic particle pusher for high frequency waves (ion cyclotron frequency and beyond) and a guiding center pusher for low frequency waves have been implemented using cylindrical coordinates in a global toroidal geometry. The two integrators correctly capture the particle orbits and agree well with each other, conserving energy and canonical angular momentum. As a verification and application of this new capability, ion guiding center simulations have been carried out to study ion orbit losses at the edge of the DIII-D tokamak for single null magnetic separatrix discharges. The ion loss conditions are examined as a function of the pitch angle for cases without and with a radial electric field. We report the simulations show good agreement with past theoretical results and with the experimentally observed feature in which high energy ions flow out along the ion drift orbits and then hit the divertor plates. A measure of the ion direct orbit loss fraction shows that the loss fraction increases with the ion energy for DIII-D in the initial velocity space. Finally, as amore » further verification of the capability of the new code, self-consistent simulations of zonal flows in the core region of the DIII-D tokamak were carried out. All DIII-D simulations were performed in the absence of turbulence.« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [2];  [3];  [4];  [5]
  1. Indian Inst. of Science, Bangalore (India)
  2. Univ. of California, Irvine, CA (United States)
  3. Xiamen Univ. (China)
  4. Inst. for Plasma Research, Bhat (India); Homi Bhabha National Inst., Mumbai (India)
  5. Inst. for Plasma Research, Bhat (India)
Publication Date:
Research Org.:
Univ. of California, Irvine, CA (United States)
Sponsoring Org.:
Board of Research in Nuclear Sciences; Science and Engineering Research Board; USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); China National Magnetic Confinement Fusion Energy Research Program; Indian Institute of Science (IISc); Indian National Science Academy (INSA)
OSTI Identifier:
1612905
Alternate Identifier(s):
OSTI ID: 1557910
Grant/Contract Number:  
SC0018270; 2013GB111000
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics; Coordinate system; Plasma confinement; Cyclotron resonance; Plasma facing components; Theoretical and computational geophysics; Rigid body dynamics; Interpolation; Tokamaks; Plasma flows; Plasma dynamics

Citation Formats

De, S., Singh, T., Kuley, A., Bao, J., Lin, Z., Sun, G. Y., Sharma, S., and Sen, A. Kinetic particle simulations in a global toroidal geometry. United States: N. p., 2019. Web. https://doi.org/10.1063/1.5108684.
De, S., Singh, T., Kuley, A., Bao, J., Lin, Z., Sun, G. Y., Sharma, S., & Sen, A. Kinetic particle simulations in a global toroidal geometry. United States. https://doi.org/10.1063/1.5108684
De, S., Singh, T., Kuley, A., Bao, J., Lin, Z., Sun, G. Y., Sharma, S., and Sen, A. Tue . "Kinetic particle simulations in a global toroidal geometry". United States. https://doi.org/10.1063/1.5108684. https://www.osti.gov/servlets/purl/1612905.
@article{osti_1612905,
title = {Kinetic particle simulations in a global toroidal geometry},
author = {De, S. and Singh, T. and Kuley, A. and Bao, J. and Lin, Z. and Sun, G. Y. and Sharma, S. and Sen, A.},
abstractNote = {The gyrokinetic toroidal code has been upgraded for global simulations by coupling the core and scrape-off layer regions across the separatrix with field-aligned particle-grid interpolations. A fully kinetic particle pusher for high frequency waves (ion cyclotron frequency and beyond) and a guiding center pusher for low frequency waves have been implemented using cylindrical coordinates in a global toroidal geometry. The two integrators correctly capture the particle orbits and agree well with each other, conserving energy and canonical angular momentum. As a verification and application of this new capability, ion guiding center simulations have been carried out to study ion orbit losses at the edge of the DIII-D tokamak for single null magnetic separatrix discharges. The ion loss conditions are examined as a function of the pitch angle for cases without and with a radial electric field. We report the simulations show good agreement with past theoretical results and with the experimentally observed feature in which high energy ions flow out along the ion drift orbits and then hit the divertor plates. A measure of the ion direct orbit loss fraction shows that the loss fraction increases with the ion energy for DIII-D in the initial velocity space. Finally, as a further verification of the capability of the new code, self-consistent simulations of zonal flows in the core region of the DIII-D tokamak were carried out. All DIII-D simulations were performed in the absence of turbulence.},
doi = {10.1063/1.5108684},
journal = {Physics of Plasmas},
number = 8,
volume = 26,
place = {United States},
year = {2019},
month = {8}
}

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Works referenced in this record:

Low frequency fully kinetic simulation of the toroidal ion temperature gradient instability
journal, August 2017

  • Sturdevant, B. J.; Chen, Y.; Parker, S. E.
  • Physics of Plasmas, Vol. 24, Issue 8
  • DOI: 10.1063/1.4999945

Equilibrium analysis of current profiles in tokamaks
journal, June 1990


X-transport: A baseline nonambipolar transport in a diverted tokamak plasma edge
journal, September 2002

  • Chang, C. S.; Kue, Seunghoe; Weitzner, H.
  • Physics of Plasmas, Vol. 9, Issue 9
  • DOI: 10.1063/1.1490348

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

Nonlinear electromagnetic formulation for particle-in-cell simulation of lower hybrid waves in toroidal geometry
journal, June 2016

  • Bao, J.; Lin, Z.; Kuley, A.
  • Physics of Plasmas, Vol. 23, Issue 6
  • DOI: 10.1063/1.4952773

Global particle simulation of lower hybrid wave propagation and mode conversion in tokamaks
conference, January 2015

  • Bao, J.; Lin, Z.; Kuley, A.
  • RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 21st Topical Conference, AIP Conference Proceedings
  • DOI: 10.1063/1.4936531

Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. II. Resistive tearing mode
journal, December 2014

  • Liu, Dongjian; Zhang, Wenlu; McClenaghan, Joseph
  • Physics of Plasmas, Vol. 21, Issue 12
  • DOI: 10.1063/1.4905074

Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. I. Internal kink mode
journal, December 2014

  • McClenaghan, J.; Lin, Z.; Holod, I.
  • Physics of Plasmas, Vol. 21, Issue 12
  • DOI: 10.1063/1.4905073

A comparison of experimental measurements and code results to determine flows in the JET SOL
journal, September 2004

  • Erents, S. K.; Pitts, R. A.; Fundamenski, W.
  • Plasma Physics and Controlled Fusion, Vol. 46, Issue 11
  • DOI: 10.1088/0741-3335/46/11/006

Current drive at plasma densities required for thermonuclear reactors
journal, August 2010

  • Cesario, R.; Amicucci, L.; Cardinali, A.
  • Nature Communications, Vol. 1, Issue 1
  • DOI: 10.1038/ncomms1052

Particle simulation of lower hybrid wave propagation in fusion plasmas
journal, August 2014


Simulation of Detachment in ITER-Geometry Using the UEDGE Code and a Fluid Neutral Model
journal, January 1996

  • Wising, F.; Knoll, D. A.; Krasheninnikov, S. I.
  • Contributions to Plasma Physics, Vol. 36, Issue 2-3
  • DOI: 10.1002/ctpp.2150360238

Neoclassical Transport in Enhanced Confinement Toroidal Plasmas
journal, January 1997


Effects of RMP-induced changes of radial electric fields on microturbulence in DIII-D pedestal top
journal, February 2019


Compressed ion temperature gradient turbulence in diverted tokamak edge
journal, May 2009

  • Chang, C. S.; Ku, S.; Diamond, P. H.
  • Physics of Plasmas, Vol. 16, Issue 5
  • DOI: 10.1063/1.3099329

Verification of particle simulation of radio frequency waves in fusion plasmas
journal, October 2013

  • Kuley, Animesh; Wang, Z. X.; Lin, Z.
  • Physics of Plasmas, Vol. 20, Issue 10
  • DOI: 10.1063/1.4826507

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

High spatial resolution equilibrium reconstruction
journal, July 2011


Assessment of edge modeling in support of ITER
journal, August 2011


Radial Localization of Toroidicity-Induced Alfvén Eigenmodes
journal, October 2013


Pedestal Bifurcation and Resonant Field Penetration at the Threshold of Edge-Localized Mode Suppression in the DIII-D Tokamak
journal, March 2015


Method to integrate full particle orbit in toroidal plasmas
journal, September 2015

  • Wei, X. S.; Xiao, Y.; Kuley, A.
  • Physics of Plasmas, Vol. 22, Issue 9
  • DOI: 10.1063/1.4929799

Chapter 4: Power and particle control
journal, June 2007


Parametric upconversion of lower hybrid wave by runaway electrons in tokamak
journal, June 2010

  • Kuley, Animesh; Tripathi, V. K.
  • Physics of Plasmas, Vol. 17, Issue 6
  • DOI: 10.1063/1.3442745

Non-local approach to kinetic effects on parallel transport in fluid models of the scrape-off layer
journal, April 2013


Verification of nonlinear particle simulation of radio frequency waves in tokamak
journal, October 2015

  • Kuley, A.; Lin, Z.; Bao, J.
  • Physics of Plasmas, Vol. 22, Issue 10
  • DOI: 10.1063/1.4934606

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

Effects of magnetic islands on bootstrap current in toroidal plasmas
journal, December 2016


Nonlinear particle simulation of ion cyclotron waves in toroidal geometry
conference, January 2015

  • Kuley, A.; Bao, J.; Lin, Z.
  • RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 21st Topical Conference, AIP Conference Proceedings
  • DOI: 10.1063/1.4936506

Poloidal Flow Driven by Ion-Temperature-Gradient Turbulence in Tokamaks
journal, January 1998


Effect of temperature gradient on plasma sheath
journal, December 1995


New B2SOLPS5.2 transport code for H-mode regimes in tokamaks
journal, January 2009


Turbulent Transport of Trapped-Electron Modes in Collisionless Plasmas
journal, August 2009


Foundations of nonlinear gyrokinetic theory
journal, April 2007


A conservative scheme of drift kinetic electrons for gyrokinetic simulation of kinetic-MHD processes in toroidal plasmas
journal, October 2017

  • Bao, J.; Liu, D.; Lin, Z.
  • Physics of Plasmas, Vol. 24, Issue 10
  • DOI: 10.1063/1.4995455

Stabilization of ion temperature gradient driven modes by lower hybrid wave in a tokamak
journal, March 2009

  • Kuley, Animesh; Tripathi, V. K.
  • Physics of Plasmas, Vol. 16, Issue 3
  • DOI: 10.1063/1.3080744

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


New Paradigm for Turbulent Transport Across a Steep Gradient in Toroidal Plasmas
journal, March 2017


Verification and validation of integrated simulation of energetic particles in fusion plasmas
journal, April 2019


What happens to full-f gyrokinetic transport and turbulence in a toroidal wedge simulation?
journal, January 2017

  • Kim, Kyuho; Chang, C. S.; Seo, Janghoon
  • Physics of Plasmas, Vol. 24, Issue 1
  • DOI: 10.1063/1.4974777

Effect of resonant magnetic perturbations on microturbulence in DIII-D pedestal
journal, October 2016


Co-current rotation of the bulk ions due to the ion orbit loss at the edge of a tokamak plasma
journal, September 2014


Nonlinear Frequency Oscillation of Alfvén Eigenmodes in Fusion Plasmas
journal, July 2012


Lower hybrid destabilization of trapped electron modes in tokamak and its consequences for anomalous diffusion
journal, July 2010

  • Kuley, Animesh; Liu, C. S.; Tripathi, V. K.
  • Physics of Plasmas, Vol. 17, Issue 7
  • DOI: 10.1063/1.3454692

A flux-coordinate independent field-aligned approach to plasma turbulence simulations
journal, November 2013


    Works referencing / citing this record:

    Development and testing of an unstructured mesh method for whole plasma gyrokinetic simulations in realistic tokamak geometry
    journal, December 2019

    • Lu, Z. X.; Lauber, Ph.; Hayward-Schneider, T.
    • Physics of Plasmas, Vol. 26, Issue 12
    • DOI: 10.1063/1.5124376