Numerical linear analysis of the effects of diamagnetic and shear flow on ballooning modes

Yanqing HUANG (黄艳清); Tianyang XIA (夏天阳); Bin GUI (桂彬)

doi:10.1088/2058-6272/aaa4f1

Plasma Science and Technology > 2018 > 20(4): 45101-045101. > DOI: 10.1088/2058-6272/aaa4f1

Yanqing HUANG (黄艳清), Tianyang XIA (夏天阳), Bin GUI (桂彬). Numerical linear analysis of the effects of diamagnetic and shear flow on ballooning modes[J]. Plasma Science and Technology, 2018, 20(4): 45101-045101. DOI: 10.1088/2058-6272/aaa4f1

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Numerical linear analysis of the effects of diamagnetic and shear flow on ballooning modes

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2 University of Science and Technology of China, Hefei 230031, People’s Republic of China

Funds: Foresight Program in the field of Plasma Physics (NSFC: No. 11261140328 and NRF: No. z012K2A2A6000443). This work was supported by program of Fusion under Contract Nos. 11405215, 11505236 and 11675217, the Reactor Physics and Digital Tokamak with the CAS ‘One-National Magnetic Confinement Fusion Science Program of Three-Five’ Strategic Planning and the JSPS-NRF-NSFC A3 China under Contract Nos. 2015GB101003, 2014GB106001 and 2013GB111002.

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Received Date: October 26, 2017

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Abstract

Abstract

The linear analysis of the influence of diamagnetic effect and toroidal rotation at the edge of tokamak plasmas with BOUT++ is discussed in this paper. This analysis is done by solving the dispersion relation, which is calculated through the numerical integration of the terms with different physics. This method is able to reveal the contributions of the different terms to the total growth rate. The diamagnetic effect stabilizes the ideal ballooning modes through inhibiting the contribution of curvature. The toroidal rotation effect is also able to suppress the curvature-driving term, and the stronger shearing rate leads to a stronger stabilization effect. In addition, through linear analysis using the energy form, the curvature-driving term provides the free energy absorbed by the line-bending term, diamagnetic term and convective term.
- ideal ballooning modes,
- numerical simulations,
- ion diamagnetic effect,
- shear flow

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References

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Numerical linear analysis of the effects of diamagnetic and shear flow on ballooning modes