Verification of a quasi-linear model for gyrokinetic turbulent transport

Staebler, Gary M.; Belli, E. A.; Candy, J.; Kinsey, J. E.; Dudding, H.; Patel, B.

doi:10.1088/1741-4326/ac243a

Title: Verification of a quasi-linear model for gyrokinetic turbulent transport

Abstract

The verification and calibration of a new quasi-linear transport model with a large database of gyrokinetic turbulence simulations is presented in this paper. In a previous paper (Staebler et al 2020 Plasma Phys. Control. Fusion 63 015013), a model for the saturated spectrum of electric potential fluctuations was developed based on the properties of the non-linear 3D spectrum. In this paper, a modification to the overall multiplicative factor in this model is found to be necessary to improve the fit to scans of the temperature and density gradients. The error in the fit of the quasi-linear fluxes of electron and ion energy fluxes is significantly better than for previous saturation models. The spectral shift model for the impact of equilibrium E × B velocity shear (Staebler et al 2013 Phys. Rev. Lett. 110 055003) and the zonal flow mixing model for electron-scale turbulence (Staebler et al 2016 Phys. Plasmas 23 062518) are both revised to be compatible with this new model. Furthermore, the models for the loss of bounce averaging and electron collisions in the TGLF reduced linear equations (Staebler et al 2005 Phys. Plasmas 12 102508) are also changed to improve the linear eigenmodes.

Authors:

^[1]; Belli, E. A. ^[1];

^[1]; Kinsey, J. E. ^[2]; Dudding, H. ^[3];

^[4]

General Atomics, San Diego, CA (United States)
CompX, San Diego, CA (United States)
Univ. of York (United Kingdom)
Univ. of York (United Kingdom); CCFE, Culham (United Kingdom)

Publication Date:: Thu Sep 23 00:00:00 EDT 2021

Research Org.:: General Atomics, San Diego, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1825536

Alternate Identifier(s):: OSTI ID: 1903379

Grant/Contract Number:: SC0019736; SC0018990; FG02-95ER54309; FC02-06ER54873; FC02-04ER54698; AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Fusion

Additional Journal Information:: Journal Volume: 61; Journal Issue: 11; Journal ID: ISSN 0029-5515

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; gyrokinetic turbulence; tokamak transport; quasi-linear model; tokamak transport, quasi-linear model, turbulence, gyrokinetic

Citation Formats


                    Staebler, Gary M., Belli, E. A., Candy, J., Kinsey, J. E., Dudding, H., and Patel, B. Verification of a quasi-linear model for gyrokinetic turbulent transport.  United States: N. p., 2021. 
Web.  doi:10.1088/1741-4326/ac243a.

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                    Staebler, Gary M., Belli, E. A., Candy, J., Kinsey, J. E., Dudding, H., & Patel, B. Verification of a quasi-linear model for gyrokinetic turbulent transport.  United States.  https://doi.org/10.1088/1741-4326/ac243a

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                    Staebler, Gary M., Belli, E. A., Candy, J., Kinsey, J. E., Dudding, H., and Patel, B. Thu .  
"Verification of a quasi-linear model for gyrokinetic turbulent transport".  United States.  https://doi.org/10.1088/1741-4326/ac243a.  https://www.osti.gov/servlets/purl/1825536.

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@article{osti_1825536,

  title        = {Verification of a quasi-linear model for gyrokinetic turbulent transport},

  author       = {Staebler, Gary M. and Belli, E. A. and Candy, J. and Kinsey, J. E. and Dudding, H. and Patel, B.},

  abstractNote = {The verification and calibration of a new quasi-linear transport model with a large database of gyrokinetic turbulence simulations is presented in this paper. In a previous paper (Staebler et al 2020 Plasma Phys. Control. Fusion 63 015013), a model for the saturated spectrum of electric potential fluctuations was developed based on the properties of the non-linear 3D spectrum. In this paper, a modification to the overall multiplicative factor in this model is found to be necessary to improve the fit to scans of the temperature and density gradients. The error in the fit of the quasi-linear fluxes of electron and ion energy fluxes is significantly better than for previous saturation models. The spectral shift model for the impact of equilibrium E × B velocity shear (Staebler et al 2013 Phys. Rev. Lett. 110 055003) and the zonal flow mixing model for electron-scale turbulence (Staebler et al 2016 Phys. Plasmas 23 062518) are both revised to be compatible with this new model. Furthermore, the models for the loss of bounce averaging and electron collisions in the TGLF reduced linear equations (Staebler et al 2005 Phys. Plasmas 12 102508) are also changed to improve the linear eigenmodes.},

  doi          = {10.1088/1741-4326/ac243a},

  journal      = {Nuclear Fusion},

  number       = 11,

  volume       = 61,

  place        = {United States},

  year         = {Thu Sep 23 00:00:00 EDT 2021},

  month        = {Thu Sep 23 00:00:00 EDT 2021}

}

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Title: Verification of a quasi-linear model for gyrokinetic turbulent transport

Abstract

Citation Formats

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Diffusive particle and heat pinch effects in toroidal plasmas journal, October 1989

Gyrokinetic simulations of off-axis minimum-q profile corrugations journal, May 2006

Multi-scale gyrokinetic simulation of tokamak plasmas: enhanced heat loss due to cross-scale coupling of plasma turbulence journal, December 2015

Rotation shear induced fluctuation decorrelation in a toroidal plasma journal, September 1994

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The first transport code simulations using the trapped gyro-Landau-fluid model
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Multi-scale gyrokinetic simulation of tokamak plasmas: enhanced heat loss due to cross-scale coupling of plasma turbulence
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Rotation shear induced fluctuation decorrelation in a toroidal plasma
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Comparisons and physics basis of tokamak transport models and turbulence simulations
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