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Title: Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz

Abstract

Quasilinear turbulent transport models are a successful tool for prediction of core tokamak plasma profiles in many regimes. Their success hinges on the reproduction of local nonlinear gyrokinetic fluxes. We focus on significant progress in the quasilinear gyrokinetic transport model QuaLiKiz (Bourdelle et al 2016 Plasma Phys. Control. Fusion 58 014036), which employs an approximated solution of the mode structures to significantly speed up computation time compared to full linear gyrokinetic solvers. Optimisation of the dispersion relation solution algorithm within integrated modelling applications leads to flux calculations $$\times {10}^{6-7}$$ faster than local nonlinear simulations. This allows tractable simulation of flux-driven dynamic profile evolution including all transport channels: ion and electron heat, main particles, impurities, and momentum. Furthermore, QuaLiKiz now includes the impact of rotation and temperature anisotropy induced poloidal asymmetry on heavy impurity transport, important for W-transport applications. Application within the JETTO integrated modelling code results in 1 s of JET plasma simulation within 10 h using 10 CPUs. Simultaneous predictions of core density, temperature, and toroidal rotation profiles for both JET hybrid and baseline experiments are presented, covering both ion and electron turbulence scales. The simulations are successfully compared to measured profiles, with agreement mostly in the 5%–25% range according to standard figures of merit. QuaLiKiz is now open source and available at www.qualikiz.com.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [2];  [3]; ORCiD logo [4];  [7]; ORCiD logo [8];  [2];  [9];  [9];  [10];  [11]
  1. Dutch Inst. for Fundamental Energy Research, Eindhoven (Netherlands); ; Alternative Energies and Atomic Energy Commission (CEA), Saint Paul Lez Durance (France)
  2. Alternative Energies and Atomic Energy Commission (CEA), Saint Paul Lez Durance (France)
  3. Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE), EURATOM/UKAEA Fusion Association
  4. Max Planck Inst. for Plasma Physics, Garching (Germany)
  5. Univ. of Milano-Bicocca (Italy); National Research Council (CNR), Milano (Italy)
  6. Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France)
  7. Ecole Polytechnique, Palaiseau (France)
  8. Technische Univ. Wien, Vienna (Austria)
  9. Dutch Inst. for Fundamental Energy Research, Eindhoven (Netherlands); Eindhoven Univ. of Technology (Netherlands)
  10. Chalmers Univ. of Technology, Goteborg (Sweden)
  11. National Research Council (CNR), Milano (Italy); Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE), EURATOM/UKAEA Fusion Association
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
Contributing Org.:
JET Contributors
OSTI Identifier:
1543926
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 12; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics

Citation Formats

Citrin, J., Bourdelle, C., Casson, F. J., Angioni, C., Bonanomi, N., Camenen, Y., Garbet, X., Garzotti, L., Görler, T., Gürcan, O., Koechl, F., Imbeaux, F., Linder, O., Plassche, K. van de, Strand, P., and Szepesi, G. Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz. United States: N. p., 2017. Web. doi:10.1088/1361-6587/aa8aeb.
Citrin, J., Bourdelle, C., Casson, F. J., Angioni, C., Bonanomi, N., Camenen, Y., Garbet, X., Garzotti, L., Görler, T., Gürcan, O., Koechl, F., Imbeaux, F., Linder, O., Plassche, K. van de, Strand, P., & Szepesi, G. Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz. United States. doi:10.1088/1361-6587/aa8aeb.
Citrin, J., Bourdelle, C., Casson, F. J., Angioni, C., Bonanomi, N., Camenen, Y., Garbet, X., Garzotti, L., Görler, T., Gürcan, O., Koechl, F., Imbeaux, F., Linder, O., Plassche, K. van de, Strand, P., and Szepesi, G. Wed . "Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz". United States. doi:10.1088/1361-6587/aa8aeb. https://www.osti.gov/servlets/purl/1543926.
@article{osti_1543926,
title = {Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz},
author = {Citrin, J. and Bourdelle, C. and Casson, F. J. and Angioni, C. and Bonanomi, N. and Camenen, Y. and Garbet, X. and Garzotti, L. and Görler, T. and Gürcan, O. and Koechl, F. and Imbeaux, F. and Linder, O. and Plassche, K. van de and Strand, P. and Szepesi, G.},
abstractNote = {Quasilinear turbulent transport models are a successful tool for prediction of core tokamak plasma profiles in many regimes. Their success hinges on the reproduction of local nonlinear gyrokinetic fluxes. We focus on significant progress in the quasilinear gyrokinetic transport model QuaLiKiz (Bourdelle et al 2016 Plasma Phys. Control. Fusion 58 014036), which employs an approximated solution of the mode structures to significantly speed up computation time compared to full linear gyrokinetic solvers. Optimisation of the dispersion relation solution algorithm within integrated modelling applications leads to flux calculations $\times {10}^{6-7}$ faster than local nonlinear simulations. This allows tractable simulation of flux-driven dynamic profile evolution including all transport channels: ion and electron heat, main particles, impurities, and momentum. Furthermore, QuaLiKiz now includes the impact of rotation and temperature anisotropy induced poloidal asymmetry on heavy impurity transport, important for W-transport applications. Application within the JETTO integrated modelling code results in 1 s of JET plasma simulation within 10 h using 10 CPUs. Simultaneous predictions of core density, temperature, and toroidal rotation profiles for both JET hybrid and baseline experiments are presented, covering both ion and electron turbulence scales. The simulations are successfully compared to measured profiles, with agreement mostly in the 5%–25% range according to standard figures of merit. QuaLiKiz is now open source and available at www.qualikiz.com.},
doi = {10.1088/1361-6587/aa8aeb},
journal = {Plasma Physics and Controlled Fusion},
number = 12,
volume = 59,
place = {United States},
year = {2017},
month = {11}
}

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