On how finite β and three-dimensional magnetic perturbations affect the instability of toroidal ion temperature gradient mode
Year: 2024
Type: article
Abstract: The effects of finite β (the ratio of plasma kinetic pressure to magnetic pressure) and three-dimensional (3D) magnetic perturbations (MPs) on the instability of toroidal ion temperature gradient (ITG) mode are studied in this work. The expression of ion magnetic drift frequency ω d i modified by the effects from both finite β and 3D MPs is firstly derived based on the local 3D equilibrium model. Then, under the assumptions of adiabatic electrons and localized mode structure around the outboard mid-plane ( ϑ p = 0 ), the dispersion equation of the long wavelength toroidal ITG mode with considering the parallel ion dynamics is derived and solved. The results show that the distribution of ω d i around the outboard mid-plane, including both ω d i , 0 = ω d i | ϑ p = 0 and ω d i , 0 ′ ′ ≡ ( d 2 ω d i / d ϑ p
Source: Nuclear Fusion
Authors: Zhangsheng Huang, Weixin Guo, Lu Wang
Institution: Huazhong University of Science and Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,470
OpenAlex ID: W4403932664