ELMy H-mode linear simulation with 3-field model on experimental advanced superconducting tokamak using BOUT++

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4757220· OSTI ID:22068815

Liu, Z X; Gao, X; Liu, S C; Ding, S Y; Li, J G ^[1]; Xia, T Y ^[1]; Xu, X Q ^[2]; Hughes, J W ^[3]

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1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
3. Massachusetts Institute of Technology, Plasma Science and Fusion Center, 175 Albany Street, Cambridge, Massachusetts 02139 (United States)

H-mode plasmas with ELM (edge localized mode) have been realized on experimental advanced superconducting tokamak (EAST) with 2.45 GHz low hybrid wave at P{sub LHW}{approx}1 MW in 2010. Data from EAST experiments including magnetic geometry, measured pressure profiles, and calculated current profiles are used to investigate the physics of ELM utilizing the BOUT++ code. Results from linear simulations show that the ELMs in EAST are dominated by resistive ballooning modes. When the Lundquist number (dimensionless ratio of the resistive diffusion time to the Alfven time) is equal to or less than 10{sup 7}, the resistive ballooning modes are found to become unstable in the ELMy H-mode plasma. For a fixed pedestal pressure profile, increasing plasma current generates more activities of low-n ELMs.

• OSTI ID: 22068815
• Journal Information: Physics of Plasmas, Vol. 19, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
BALLOONING INSTABILITY
EDGE LOCALIZED MODES
ELECTRIC CURRENTS
GHZ RANGE
H-MODE PLASMA CONFINEMENT
HT-7U TOKAMAK