Resolving the mystery of transport within internal transport barriers

Staebler, Gary M.; Kinsey, Jon E.; Belli, Emily A.; Candy, Jefferey; Waltz, Ronald E.; Greenfield, Charles M.; Lao, Lang L.; Smith, Sterling P.; Grierson, Brain A.; Chrystal, Colin

doi:10.1063/1.4875334

Title: Resolving the mystery of transport within internal transport barriers

Journal Article · Fri May 02 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4875334· OSTI ID:1354825

Staebler, Gary M. ^[1]; Kinsey, Jon E. ^[2]; Belli, Emily A. ^[1]; Candy, Jefferey ^[1]; Waltz, Ronald E. ^[1]; Greenfield, Charles M. ^[1]; Lao, Lang L. ^[1]; Smith, Sterling P. ^[1]; Grierson, Brain A. ^[3]; Chrystal, Colin ^[4]

General Atomics, San Diego, CA (United States)
CompX, Del Mar, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, San Diego, CA (United States)

Here, the Trapped Gyro-Landau Fluid (TGLF) quasi-linear model, which is calibrated to nonlinear gyrokinetic turbulence simulations, is now able to predict the electron density, electron and ion temperatures and ion toroidal rotation simultaneously for internal transport barrier (ITB) discharges. This is a strong validation of gyrokinetic theory of ITBs, requiring multiple instabilities responsible for transport in different channels at different scales. The mystery of transport inside the ITB is that momentum and particle transport is far above the predicted neoclassical levels in apparent contradiction with the expectation from the theory of suppression of turbulence by E × B velocity shear. The success of TGLF in predicting ITB transport is due to the inclusion of ion gyro-radius scale modes that become dominant at high E × B velocity shear and to improvements to TGLF that allow momentum transport from gyrokinetic turbulence to be faithfully modeled.

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

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

Grant/Contract Number:: FC02-04ER54698; FG02-95ER54309; FG03-99ER54541; FG02-07ER54917; AC02-09CH11466

OSTI ID:: 1354825

Journal Information:: Physics of Plasmas, Vol. 21, Issue 5; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz Citrin, J.; Bourdelle, C.; Casson, F. J. Plasma Physics and Controlled Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1361-6587/aa8aeb	journal	November 2017
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Global gyrokinetic simulations of intrinsic rotation in ASDEX Upgrade Ohmic L-mode plasmas Hornsby, W. A.; Angioni, C.; Lu, Z. X. Nuclear Fusion, Vol. 58, Issue 5 https://doi.org/10.1088/1741-4326/aab22f	journal	March 2018
Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz Citrin, J.; Bourdelle, C.; Casson, F. J. arXiv https://doi.org/10.48550/arxiv.1708.01224	text	January 2017

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