Gyrokinetic simulations of ion and impurity transport

Estrada-Mila, C.; Candy, J.; Waltz, R. E.

doi:10.1063/1.1848544

Title: Gyrokinetic simulations of ion and impurity transport

Journal Article · 11 January 2005 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.1848544 · OSTI ID:1564615

Estrada-Mila, C. ^[1]; Candy, J. ^[2]; Waltz, R. E. ^[2]

Univ. of California, San Diego, La Jolla, CA (United States). Dept. of Mechanical and Aerospace Engineering
General Atomics, San Diego, CA (United States)

A systematic study of turbulent particle and energy transport in both pure and multicomponent plasmas is presented. In this study, gyrokinetic results from the GYRO code are supplemented with those from the GLF23 transport model, as well as from quasilinear theory. Various results are obtained. The production of a particle pinch driven by temperature gradients (a thermal pinch) is demonstrated, and further shown to be weakened by finite electron collisionality. Helium transport and the effects of helium density gradient and concentration in a deuterium plasma are examined. Interestingly, it is found that the simple D-v (diffusion versus convective velocity) model of impurity flow is consistent with results obtained from nonlinear gyrokinetic simulations. Also studied is the transport in a 50-50 deuterium-tritium plasma, where a symmetry breaking is observed indicating the potential for fuel separation in a burning plasma. Quasilinear theory together with linear simulations shows that the symmetry breaking which enhances the tritium confinement arises largely from finite-Larmor-radius effects. As a result, to justify the numerical methods used in the paper, a variety of linear benchmarks and nonlinear grid refinement studies are detailed.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG03-95ER54309

OSTI ID:: 1564615

Journal Information:: Physics of Plasmas, Vol. 12, Issue 2; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 104 works

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Observation of enhanced ion particle transport in mixed H/D isotope plasmas on JET Maslov, M.; King, D. B.; Viezzer, E. Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac342	journal	June 2018
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Transition between Isotope-Mixing and Nonmixing States in Hydrogen-Deuterium Mixture Plasmas Ida, K.; Nakata, M.; Tanaka, K. Physical Review Letters, Vol. 124, Issue 2 https://doi.org/10.1103/physrevlett.124.025002	journal	January 2020
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