Microturbulence in DIII-D tokamak pedestal. III. Effects of collisions

Liao, X.; Lin, Z.; Holod, I.; Xiao, Y.; Li, B.; Snyder, P. B.

doi:10.1063/1.4972079

Title: Microturbulence in DIII-D tokamak pedestal. III. Effects of collisions

Journal Article · Fri Dec 16 00:00:00 EST 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4972079· OSTI ID:1497077

^[1];

^[2]; Holod, I. ^[2]; Xiao, Y. ^[3]; Li, B. ^[1]; Snyder, P. B. ^[4]

Peking Univ., Beijing (China)
Univ. of California, Irvine, CA (United States)
Zhejiang Univ., Hangzhou (China).
General Atomics, San Diego, CA (United States)

Gyrokinetic simulations of the H-mode pedestal in DIII-D discharge 145701 find that the kinetic ballooning mode (KBM) is the most unstable mode for low toroidal numbers (n ≤ 25) and that the trapped electron mode (TEM) dominates over the KBM at higher toroidal mode numbers for realistic pressure gradients in the pedestal. Collisions reduce the TEM growth rate but have little effects on the KBM. KBM has the conventional ballooning mode structure peaking at the outer mid-plane, while TEM has an unconventional mode structure peaking at the top and bottom of the poloidal plane.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725; SC0010416

OSTI ID:: 1497077

Journal Information:: Physics of Plasmas, Vol. 23, Issue 12; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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