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Title: Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation

Abstract

The SOL width is a parameter of paramount importance in modern tokamaks as it controls the power density deposited at the divertor plates, critical for plasma-facing material survivability. An understanding of the parameters controlling it has consequently long been sought. Prior to Chang et al. (2017 NF 57 11), studies of the tokamak edge have been mostly confined to reduced fluid models and simplified geometries, leaving out important pieces of physics. Here, we analyze the results of a DIII-D simulation performed with the full-f gyrokinetic code XGC1 which includes both turbulence and neoclassical effects in realistic divertor geometry. More specifically, we calculate the particle and heat E x B fluxes along the separatrix, discriminating between equilibrium and turbulent contributions. We find that the density SOL width is impacted almost exclusively by the turbulent electron flux. In this simulation, the level of edge turbulence is regulated by a mechanism we are only beginning to understand: grad-B-drifts and ion X-point losses at the top and bottom of the machine, along with ion banana orbits at the low field side (LFS), result in a complex poloidal potential structure at the separatrix which is the cause of the E x B drift pattern thatmore » we observe. Turbulence is being suppressed by the shear flows that this potential generates. At the same time, turbulence, along with increased edge collisionality and electron inertia, can influence the shape of the potential structure by making the electrons non-adiabatic. Furthermore, being the only means through which the electrons can lose confinement, it needs to be in a balance with the original direct ion orbit losses to maintain charge neutrality.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1];  [3];  [3]; ORCiD logo [3]; ORCiD logo [3]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
  2. Lodestar Research Corporation, Boulder, CO (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lodestar Research Corp., Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1466035
Alternate Identifier(s):
OSTI ID: 1461242
Report Number(s):
DOE-ER/54392-90; PPPL/SO15882C-1; LRC-18-175
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
FG02-97ER54392; SO15882-C
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 7; Related Information: http://dx.doi.org/10.5281/zenodo.1230040; 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; fusion; tokamak; scrape-off-layer; turbulence; gyro-kinetic; simulation

Citation Formats

Keramidas Charidakos, I., Myra, J. R., Parker, S., Ku, S., Churchill, R. M., Hager, R., and Chang, C. S. Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation. United States: N. p., 2018. Web. doi:10.1063/1.5037723.
Keramidas Charidakos, I., Myra, J. R., Parker, S., Ku, S., Churchill, R. M., Hager, R., & Chang, C. S. Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation. United States. doi:https://doi.org/10.1063/1.5037723
Keramidas Charidakos, I., Myra, J. R., Parker, S., Ku, S., Churchill, R. M., Hager, R., and Chang, C. S. Mon . "Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation". United States. doi:https://doi.org/10.1063/1.5037723. https://www.osti.gov/servlets/purl/1466035.
@article{osti_1466035,
title = {Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation},
author = {Keramidas Charidakos, I. and Myra, J. R. and Parker, S. and Ku, S. and Churchill, R. M. and Hager, R. and Chang, C. S.},
abstractNote = {The SOL width is a parameter of paramount importance in modern tokamaks as it controls the power density deposited at the divertor plates, critical for plasma-facing material survivability. An understanding of the parameters controlling it has consequently long been sought. Prior to Chang et al. (2017 NF 57 11), studies of the tokamak edge have been mostly confined to reduced fluid models and simplified geometries, leaving out important pieces of physics. Here, we analyze the results of a DIII-D simulation performed with the full-f gyrokinetic code XGC1 which includes both turbulence and neoclassical effects in realistic divertor geometry. More specifically, we calculate the particle and heat E x B fluxes along the separatrix, discriminating between equilibrium and turbulent contributions. We find that the density SOL width is impacted almost exclusively by the turbulent electron flux. In this simulation, the level of edge turbulence is regulated by a mechanism we are only beginning to understand: grad-B-drifts and ion X-point losses at the top and bottom of the machine, along with ion banana orbits at the low field side (LFS), result in a complex poloidal potential structure at the separatrix which is the cause of the E x B drift pattern that we observe. Turbulence is being suppressed by the shear flows that this potential generates. At the same time, turbulence, along with increased edge collisionality and electron inertia, can influence the shape of the potential structure by making the electrons non-adiabatic. Furthermore, being the only means through which the electrons can lose confinement, it needs to be in a balance with the original direct ion orbit losses to maintain charge neutrality.},
doi = {10.1063/1.5037723},
journal = {Physics of Plasmas},
number = 7,
volume = 25,
place = {United States},
year = {2018},
month = {7}
}

Works referenced in this record:

Transport-driven Scrape-Off-Layer flows and the boundary conditions imposed at the magnetic separatrix in a tokamak plasma
journal, September 2004


Calculation of the radial electric field from a modified Ohm's law
journal, January 2017

  • Wilks, T. M.; Stacey, W. M.; Evans, T. E.
  • Physics of Plasmas, Vol. 24, Issue 1
  • DOI: 10.1063/1.4973599

Total fluid pressure imbalance in the scrape-off layer of tokamak plasmas
journal, March 2017


Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
dataset, April 2018

  • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
  • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
  • DOI: 10.5281/zenodo.1230040

Formation of a density blob and its dynamics in the edge and the scrape-off layer of a tokamak plasma
journal, October 2005

  • Bisai, N.; Das, A.; Deshpande, S.
  • Physics of Plasmas, Vol. 12, Issue 10
  • DOI: 10.1063/1.2083791

Experimental Observation of the Blob-Generation Mechanism from Interchange Waves in a Plasma
journal, February 2008


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

Edge and divertor physics with reversed toroidal field in JET
journal, March 2005


Analysis of drift effects on the tokamak power scrape-off width using SOLPS-ITER
journal, November 2016


Intrinsic momentum generation by a combined neoclassical and turbulence mechanism in diverted DIII-D plasma edge
journal, September 2014

  • Seo, Janghoon; Chang, C. S.; Ku, S.
  • Physics of Plasmas, Vol. 21, Issue 9
  • DOI: 10.1063/1.4894242

Fast Low-to-High Confinement Mode Bifurcation Dynamics in a Tokamak Edge Plasma Gyrokinetic Simulation
journal, April 2017


An intrinsic source of radial electric field and edge flows in tokamaks
journal, April 2009


Tokamak-edge toroidal rotation due to inhomogeneous transport and geodesic curvature
journal, May 2012


Thermal ion orbit loss and radial electric field in DIII-D
journal, August 2015

  • deGrassie, J. S.; Boedo, J. A.; Grierson, B. A.
  • Physics of Plasmas, Vol. 22, Issue 8
  • DOI: 10.1063/1.4928558

Wall intersection of ion orbits induced by fast transport of pedestal plasma over an electrostatic potential hill in a tokamak plasma edge
journal, October 2005

  • Hahn, S. H.; Ku, Seunghoe; Chang, C. S.
  • Physics of Plasmas, Vol. 12, Issue 10
  • DOI: 10.1063/1.2052487

Reduced model simulations of the scrape-off-layer heat-flux width and comparison with experiment
journal, January 2011

  • Myra, J. R.; Russell, D. A.; D’Ippolito, D. A.
  • Physics of Plasmas, Vol. 18, Issue 1
  • DOI: 10.1063/1.3526676

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

Ideal ballooning modes in the tokamak scrape-off layer
journal, May 2013

  • Halpern, Federico D.; Jolliet, Sebastien; Loizu, Joaquim
  • Physics of Plasmas, Vol. 20, Issue 5
  • DOI: 10.1063/1.4807333

Intrinsic toroidal velocity near the edge of DIII-D H-mode plasmas
journal, July 2009


Generalised ballooning theory of two-dimensional tokamak modes
journal, December 2017

  • Abdoul, P. A.; Dickinson, D.; Roach, C. M.
  • Plasma Physics and Controlled Fusion, Vol. 60, Issue 2
  • DOI: 10.1088/1361-6587/aa9352

Property of an X-point generated velocity-space hole in a diverted tokamak plasma edge
journal, December 2004

  • Ku, Seunghoe; Baek, Hoyul; Chang, C. S.
  • Physics of Plasmas, Vol. 11, Issue 12
  • DOI: 10.1063/1.1812273

Influence of sheared poloidal rotation on edge turbulence
journal, January 1990

  • Biglari, H.; Diamond, P. H.; Terry, P. W.
  • Physics of Fluids B: Plasma Physics, Vol. 2, Issue 1
  • DOI: 10.1063/1.859529

Spontaneous rotation sources in a quiescent tokamak edge plasma
journal, June 2008


Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
dataset, April 2018

  • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
  • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
  • DOI: 10.5281/zenodo.1230039

Drifts, currents, and power scrape-off width in SOLPS-ITER modeling of DIII-D
journal, August 2017


EDGE2D code simulations of SOL flows and in–out divertor asymmetries in JET
journal, March 2005


Drift-based scrape-off particle width in X-point geometry
journal, February 2017


Turbulent transport regimes and the scrape-off layer heat flux width
journal, April 2015

  • Myra, J. R.; D'Ippolito, D. A.; Russell, D. A.
  • Physics of Plasmas, Vol. 22, Issue 4
  • DOI: 10.1063/1.4919255

Intrinsic toroidal rotation in the scrape-off layer of tokamaks
journal, June 2014

  • Loizu, J.; Ricci, P.; Halpern, F. D.
  • Physics of Plasmas, Vol. 21, Issue 6
  • DOI: 10.1063/1.4883498

Simulation of Parallel SOL Flows with UEDGE
journal, March 2008

  • Pigarov, A. Yu.; Krasheninnikov, S. I.; LaBombard, B.
  • Contributions to Plasma Physics, Vol. 48, Issue 1-3
  • DOI: 10.1002/ctpp.200810014

Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma
journal, May 1995

  • Hahm, T. S.; Burrell, K. H.
  • Physics of Plasmas, Vol. 2, Issue 5
  • DOI: 10.1063/1.871313

Theoretical aspects and practical implications of the heuristic drift SOL model
journal, August 2015


Kinetic neoclassical transport in the H-mode pedestal
journal, July 2014

  • Battaglia, D. J.; Burrell, K. H.; Chang, C. S.
  • Physics of Plasmas, Vol. 21, Issue 7
  • DOI: 10.1063/1.4886803

Numerical analysis of the SOL/divertor plasma flow with the effect of drifts
journal, June 2007


Gyrokinetic projection of the divertor heat-flux width from present tokamaks to ITER
journal, August 2017


Structure of the classical scrape-off layer of a tokamak
journal, January 2018

  • Rozhansky, V.; Kaveeva, E.; Senichenkov, I.
  • Plasma Physics and Controlled Fusion, Vol. 60, Issue 3
  • DOI: 10.1088/1361-6587/aaa11a

Heuristic drift-based model of the power scrape-off width in low-gas-puff H-mode tokamaks
journal, December 2011


Improvements to an ion orbit loss calculation in the tokamak edge
journal, December 2016

  • Wilks, T. M.; Stacey, W. M.
  • Physics of Plasmas, Vol. 23, Issue 12
  • DOI: 10.1063/1.4968219

Pedestal and edge electrostatic turbulence characteristics from an XGC1 gyrokinetic simulation
journal, August 2017

  • Churchill, R. M.; Chang, C. S.; Ku, S.
  • Plasma Physics and Controlled Fusion, Vol. 59, Issue 10
  • DOI: 10.1088/1361-6587/aa7c03

Recent Developments in Plasma Edge Theory: Recent Developments in Plasma Edge Theory
journal, July 2016


A new hybrid-Lagrangian numerical scheme for gyrokinetic simulation of tokamak edge plasma
journal, June 2016


Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER
journal, August 2013


A design retrospective of the DIII-D tokamak
journal, May 2002


Drive of parallel flows by turbulence and large-scale E × B transverse transport in divertor geometry
journal, February 2017


Bifurcation theory of poloidal rotation in tokamaks: A model for L-H transition
journal, November 1989


Comparison of theoretical models for scrape-off layer widths with data from COMPASS-D, JET and Alcator C-Mod
journal, February 1999


Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width
journal, September 2015

  • Russell, D. A.; D'Ippolito, D. A.; Myra, J. R.
  • Physics of Plasmas, Vol. 22, Issue 9
  • DOI: 10.1063/1.4930285

Kinetic modeling of divertor heat load fluxes in the Alcator C-Mod and DIII-D tokamaks
journal, September 2015

  • Pankin, A. Y.; Rafiq, T.; Kritz, A. H.
  • Physics of Plasmas, Vol. 22, Issue 9
  • DOI: 10.1063/1.4931050

Role of subdominant stable modes in plasma microturbulence
journal, May 2011

  • Hatch, D. R.; Terry, P. W.; Jenko, F.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3563536

Interpretation of changes in diffusive and non-diffusive transport in the edge plasma during pedestal buildup following a low-high transition in DIII-D
journal, January 2013

  • Stacey, W. M.; Sayer, M. -H.; Floyd, J. -P.
  • Physics of Plasmas, Vol. 20, Issue 1
  • DOI: 10.1063/1.4775601

Transport-Driven Toroidal Rotation in the Tokamak Edge
journal, February 2012


Suppression of turbulence and transport by sheared flow
journal, January 2000


Theory based scaling of edge turbulence and implications for the scrape-off layer width
journal, November 2016

  • Myra, J. R.; Russell, D. A.; Zweben, S. J.
  • Physics of Plasmas, Vol. 23, Issue 11
  • DOI: 10.1063/1.4966564

A possible role of radial electric field in driving parallel ion flow in scrape-off layer of divertor tokamaks
journal, July 2007


Convective transport by intermittent blob-filaments: Comparison of theory and experiment
journal, June 2011

  • D’Ippolito, D. A.; Myra, J. R.; Zweben, S. J.
  • Physics of Plasmas, Vol. 18, Issue 6
  • DOI: 10.1063/1.3594609

    Works referencing / citing this record:

    Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
    dataset, April 2018

    • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
    • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
    • DOI: 10.5281/zenodo.1230039

    Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
    dataset, April 2018

    • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
    • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
    • DOI: 10.5281/zenodo.1230040

    Simulation of Parallel SOL Flows with UEDGE
    journal, March 2008

    • Pigarov, A. Yu.; Krasheninnikov, S. I.; LaBombard, B.
    • Contributions to Plasma Physics, Vol. 48, Issue 1-3
    • DOI: 10.1002/ctpp.200810014

    Recent Developments in Plasma Edge Theory: Recent Developments in Plasma Edge Theory
    journal, July 2016


    A new hybrid-Lagrangian numerical scheme for gyrokinetic simulation of tokamak edge plasma
    journal, June 2016


    EDGE2D code simulations of SOL flows and in–out divertor asymmetries in JET
    journal, March 2005


    Edge and divertor physics with reversed toroidal field in JET
    journal, March 2005


    Numerical analysis of the SOL/divertor plasma flow with the effect of drifts
    journal, June 2007


    Theoretical aspects and practical implications of the heuristic drift SOL model
    journal, August 2015


    Drifts, currents, and power scrape-off width in SOLPS-ITER modeling of DIII-D
    journal, August 2017


    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

    Property of an X-point generated velocity-space hole in a diverted tokamak plasma edge
    journal, December 2004

    • Ku, Seunghoe; Baek, Hoyul; Chang, C. S.
    • Physics of Plasmas, Vol. 11, Issue 12
    • DOI: 10.1063/1.1812273

    Wall intersection of ion orbits induced by fast transport of pedestal plasma over an electrostatic potential hill in a tokamak plasma edge
    journal, October 2005

    • Hahn, S. H.; Ku, Seunghoe; Chang, C. S.
    • Physics of Plasmas, Vol. 12, Issue 10
    • DOI: 10.1063/1.2052487

    Formation of a density blob and its dynamics in the edge and the scrape-off layer of a tokamak plasma
    journal, October 2005

    • Bisai, N.; Das, A.; Deshpande, S.
    • Physics of Plasmas, Vol. 12, Issue 10
    • DOI: 10.1063/1.2083791

    Spontaneous rotation sources in a quiescent tokamak edge plasma
    journal, June 2008


    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

    Reduced model simulations of the scrape-off-layer heat-flux width and comparison with experiment
    journal, January 2011

    • Myra, J. R.; Russell, D. A.; D’Ippolito, D. A.
    • Physics of Plasmas, Vol. 18, Issue 1
    • DOI: 10.1063/1.3526676

    Role of subdominant stable modes in plasma microturbulence
    journal, May 2011

    • Hatch, D. R.; Terry, P. W.; Jenko, F.
    • Physics of Plasmas, Vol. 18, Issue 5
    • DOI: 10.1063/1.3563536

    Convective transport by intermittent blob-filaments: Comparison of theory and experiment
    journal, June 2011

    • D’Ippolito, D. A.; Myra, J. R.; Zweben, S. J.
    • Physics of Plasmas, Vol. 18, Issue 6
    • DOI: 10.1063/1.3594609

    Tokamak-edge toroidal rotation due to inhomogeneous transport and geodesic curvature
    journal, May 2012


    Interpretation of changes in diffusive and non-diffusive transport in the edge plasma during pedestal buildup following a low-high transition in DIII-D
    journal, January 2013

    • Stacey, W. M.; Sayer, M. -H.; Floyd, J. -P.
    • Physics of Plasmas, Vol. 20, Issue 1
    • DOI: 10.1063/1.4775601

    Ideal ballooning modes in the tokamak scrape-off layer
    journal, May 2013

    • Halpern, Federico D.; Jolliet, Sebastien; Loizu, Joaquim
    • Physics of Plasmas, Vol. 20, Issue 5
    • DOI: 10.1063/1.4807333

    Intrinsic toroidal rotation in the scrape-off layer of tokamaks
    journal, June 2014

    • Loizu, J.; Ricci, P.; Halpern, F. D.
    • Physics of Plasmas, Vol. 21, Issue 6
    • DOI: 10.1063/1.4883498

    Kinetic neoclassical transport in the H-mode pedestal
    journal, July 2014

    • Battaglia, D. J.; Burrell, K. H.; Chang, C. S.
    • Physics of Plasmas, Vol. 21, Issue 7
    • DOI: 10.1063/1.4886803

    Intrinsic momentum generation by a combined neoclassical and turbulence mechanism in diverted DIII-D plasma edge
    journal, September 2014

    • Seo, Janghoon; Chang, C. S.; Ku, S.
    • Physics of Plasmas, Vol. 21, Issue 9
    • DOI: 10.1063/1.4894242

    Turbulent transport regimes and the scrape-off layer heat flux width
    journal, April 2015

    • Myra, J. R.; D'Ippolito, D. A.; Russell, D. A.
    • Physics of Plasmas, Vol. 22, Issue 4
    • DOI: 10.1063/1.4919255

    Thermal ion orbit loss and radial electric field in DIII-D
    journal, August 2015

    • deGrassie, J. S.; Boedo, J. A.; Grierson, B. A.
    • Physics of Plasmas, Vol. 22, Issue 8
    • DOI: 10.1063/1.4928558

    Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width
    journal, September 2015

    • Russell, D. A.; D'Ippolito, D. A.; Myra, J. R.
    • Physics of Plasmas, Vol. 22, Issue 9
    • DOI: 10.1063/1.4930285

    Kinetic modeling of divertor heat load fluxes in the Alcator C-Mod and DIII-D tokamaks
    journal, September 2015

    • Pankin, A. Y.; Rafiq, T.; Kritz, A. H.
    • Physics of Plasmas, Vol. 22, Issue 9
    • DOI: 10.1063/1.4931050

    Theory based scaling of edge turbulence and implications for the scrape-off layer width
    journal, November 2016

    • Myra, J. R.; Russell, D. A.; Zweben, S. J.
    • Physics of Plasmas, Vol. 23, Issue 11
    • DOI: 10.1063/1.4966564

    Improvements to an ion orbit loss calculation in the tokamak edge
    journal, December 2016

    • Wilks, T. M.; Stacey, W. M.
    • Physics of Plasmas, Vol. 23, Issue 12
    • DOI: 10.1063/1.4968219

    Calculation of the radial electric field from a modified Ohm's law
    journal, January 2017

    • Wilks, T. M.; Stacey, W. M.; Evans, T. E.
    • Physics of Plasmas, Vol. 24, Issue 1
    • DOI: 10.1063/1.4973599

    Influence of sheared poloidal rotation on edge turbulence
    journal, January 1990

    • Biglari, H.; Diamond, P. H.; Terry, P. W.
    • Physics of Fluids B: Plasma Physics, Vol. 2, Issue 1
    • DOI: 10.1063/1.859529

    Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma
    journal, May 1995

    • Hahm, T. S.; Burrell, K. H.
    • Physics of Plasmas, Vol. 2, Issue 5
    • DOI: 10.1063/1.871313

    Comparison of theoretical models for scrape-off layer widths with data from COMPASS-D, JET and Alcator C-Mod
    journal, February 1999


    A design retrospective of the DIII-D tokamak
    journal, May 2002


    Transport-driven Scrape-Off-Layer flows and the boundary conditions imposed at the magnetic separatrix in a tokamak plasma
    journal, September 2004


    A possible role of radial electric field in driving parallel ion flow in scrape-off layer of divertor tokamaks
    journal, July 2007


    An intrinsic source of radial electric field and edge flows in tokamaks
    journal, April 2009


    Intrinsic toroidal velocity near the edge of DIII-D H-mode plasmas
    journal, July 2009


    Heuristic drift-based model of the power scrape-off width in low-gas-puff H-mode tokamaks
    journal, December 2011


    Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER
    journal, August 2013


    Analysis of drift effects on the tokamak power scrape-off width using SOLPS-ITER
    journal, November 2016


    Pedestal and edge electrostatic turbulence characteristics from an XGC1 gyrokinetic simulation
    journal, August 2017

    • Churchill, R. M.; Chang, C. S.; Ku, S.
    • Plasma Physics and Controlled Fusion, Vol. 59, Issue 10
    • DOI: 10.1088/1361-6587/aa7c03

    Generalised ballooning theory of two-dimensional tokamak modes
    journal, December 2017

    • Abdoul, P. A.; Dickinson, D.; Roach, C. M.
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 2
    • DOI: 10.1088/1361-6587/aa9352

    Structure of the classical scrape-off layer of a tokamak
    journal, January 2018

    • Rozhansky, V.; Kaveeva, E.; Senichenkov, I.
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 3
    • DOI: 10.1088/1361-6587/aaa11a

    Drive of parallel flows by turbulence and large-scale E × B transverse transport in divertor geometry
    journal, February 2017


    Drift-based scrape-off particle width in X-point geometry
    journal, February 2017


    Total fluid pressure imbalance in the scrape-off layer of tokamak plasmas
    journal, March 2017


    Gyrokinetic projection of the divertor heat-flux width from present tokamaks to ITER
    journal, August 2017


    Fast Low-to-High Confinement Mode Bifurcation Dynamics in a Tokamak Edge Plasma Gyrokinetic Simulation
    journal, April 2017


    Suppression of turbulence and transport by sheared flow
    journal, January 2000