Impact of centrifugal drifts on ion turbulent transport

Belli, Emily A.; Candy, J.

doi:10.1063/1.5020298

Title: Impact of centrifugal drifts on ion turbulent transport

Journal Article · 28 February 2018 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5020298 · OSTI ID:1438439

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General Atomics, San Diego, CA (United States); General Atomics
General Atomics, San Diego, CA (United States)

Here, the influence of sonic toroidal rotation on gyrokinetic stability and transport is studied, with important implications for heavy impurity dynamics. When centrifugal drifts and electrostatic trapping corrections are included, significant modifications to the calculated transport of heavy impurities are observed. These high-rotation corrections add to the standard Coriolis drift and toroidal rotation shear drive which are normally included in gyrokinetics. Yet, because of their complexity, centrifugal and electrostatic trapping terms (quadratic in the main ion Mach number) are not generally included in gyrokinetic codes. In this work, we explore the implications of using reduced descriptions of the rotational physics. For heavy impurities such as tungsten, cross terms due to the centrifugal force can dominate the rotation dynamics, and neglecting them is shown to lead to large errors in the impurity particle flux.

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

Sponsoring Organization:: USDOE; USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: FC02-06ER54873; FG02-95ER54309

OSTI ID:: 1438439

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 25; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Magnetic shear due to localized toroidal flow shear in tokamaks Lee, Jungpyo; Cerfon, Antoine Plasma Physics and Controlled Fusion, Vol. 61, Issue 10 https://doi.org/10.1088/1361-6587/ab3a7f	journal	September 2019
Evaluating the effects of tungsten on CFETR phase I performance Shi, Shengyu; Jian, Xiang; Chan, Vincent S. Nuclear Fusion, Vol. 58, Issue 12 https://doi.org/10.1088/1741-4326/aae397	journal	October 2018

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