Nonlinear MHD simulations of Quiescent H-mode plasmas in DIII-D

Liu, Feng; Huijsmans, G. T. A.; Loarte, A.; Garofalo, Andrea M.; Solomon, Wayne M.; Snyder, Philip B.; Hoelzl, M.; Zeng, L.

doi:10.1088/0029-5515/55/11/113002

Title: Nonlinear MHD simulations of Quiescent H-mode plasmas in DIII-D

Journal Article · Fri Sep 04 00:00:00 EDT 2015 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/55/11/113002· OSTI ID:1375950

Liu, Feng ^[1]; Huijsmans, G. T. A. ^[1]; Loarte, A. ^[1]; Garofalo, Andrea M. ^[2]; Solomon, Wayne M. ^[3]; Snyder, Philip B. ^[2]; Hoelzl, M. ^[4]; Zeng, L. ^[5]

ITER Organization, St. Paul Lez Durance (France)
General Atomics, San Diego, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Max Planck Inst. for Plasma Physics, Garching (Germany)
Univ. of California, Los Angeles, CA (United States)

In the Quiescent H-mode (QH-mode) regime, the edge harmonic oscillation (EHO), thought to be a saturated kink-peeling mode (KPM) driven unstable by current and rotation, is found in experiment to provide sufficient stationary edge particle transport to avoid the periodic expulsion of particles and energy by edge localized modes (ELMs). In this article, both linear and nonlinear MHD modelling of QH-mode plasmas from the DIII-D tokamak have been investigated to understand the mechanism leading to the appearance of the EHO in QH-mode plasmas. For the first time nonlinear MHD simulations with low-n modes both with ideal wall and resistive wall boundary conditions have been carried out with 3-D non-linear MHD code JOREK. The results show, in agreement with the original conjectures, that in the nonlinear phase, kink peeling modes are the main unstable modes in QH-mode plasmas of DIIID and that the kink-peeling modes saturate non-linearly leading to a 3-D stationary state. The characteristics of the kink-peeling modes, in terms of mode structure and associated decrease of the edge plasma density associated with them, are in good agreement with experimental measurements of the EHO in DIII-D. Finally, the effect of plasma resistivity, the role of plasma parallel rotation as well as the effect of the conductivity of the vacuum vessel wall on the destabilization and saturation of kink-peeling modes have been evaluated for experimental QH-mode plasma conditions in DIII-D.

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-04ER54698; AC02-09CH11466

OSTI ID:: 1375950

Alternate ID(s):: OSTI ID: 1238897

Journal Information:: Nuclear Fusion, Vol. 55, Issue 11; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 68 works

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Cited By (5)

Insights into type-I edge localized modes and edge localized mode control from JOREK non-linear magneto-hydrodynamic simulations Hoelzl, M.; Huijsmans, G. T. A.; Orain, F. Contributions to Plasma Physics, Vol. 58, Issue 6-8 https://doi.org/10.1002/ctpp.201700142	journal	April 2018
Edge state selection by modulating E × B shearing profile in toroidally confined plasmas Zhang, Y.; Guo, Z. B.; Xu, X. Q. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5093773	journal	May 2019
Penetration properties of resonant magnetic perturbation in EAST Tokamak Zhang, H. W.; Ma, Z. W.; Zhang, W. Physics of Plasmas, Vol. 26, Issue 11 https://doi.org/10.1063/1.5116669	journal	November 2019
Transition from no-ELM response to pellet ELM triggering during pedestal build-up—insights from extended MHD simulations Futatani, S.; Cathey, A.; Hoelzl, M. Nuclear Fusion, Vol. 61, Issue 4 https://doi.org/10.1088/1741-4326/abdfb4	journal	March 2021
The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas Hoelzl, M.; Huijsmans, Gta; Pamela, Sjp arXiv https://doi.org/10.48550/arxiv.2011.09120	text	January 2020

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