May 8-10

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Author: Kaixuan Fan
Requested Type: Poster
Submitted: 2023-04-06 23:38:38

Co-authors: X.Q.Xu, B.Zhu, C. Dong

Contact Info:
Peking University
Yiheyuan Road No.5, Haidian di
zaozhuang, shandong   100871
中国

Abstract Text:
Micro-tearing mode (MTM) has been proposed as a potential driving mechanism crucial for pedestal plasma turbulence transport [1]. Recently, Larakers et al. extended the classical Hazeltine electric conductivity model [2] to include radial variation [3]. We revisited this derivation, derived dispersion relations in various limiting cases, and compared them with different MTM models in the literature [4-5]. Using the collisional fluid model [5], we investigated the effect of a time-dependent thermal force on the drift Alfven wave (DAW) instability under C-Mod discharge parameters [6]. Our findings indicate that MTM and DAW are unstable in different locations with respect to the rational surface. Additionally, we found that the time-dependent thermal force can further destabilize the DAW instability.

[1] D. Hatch et.al., Nucl. Fusion 56, 104003 (2016)
[2] R. Hazeltine et.al., Phys. Fluids 18, 1778 (1975)
[3] J. Larakers et.al., Phys. Plasmas 27, 062503 (2020)
[4] J. Drake and Y. Lee, Phys. Fluids 20, 1341 (1977)
[5] A. Hassam, Phys. Fluids 23, 2493 (1980)
[6] Y. Lang et. al., Nucl. Fusion 62, 086018 (2022)

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