American Institute of Physics, Physics of Plasmas, 1(30), p. 014503, 2023
DOI: 10.1063/5.0134054
Full text: Unavailable
A study is made of the effect of plasma elongation ([Formula: see text]) on parity of a global electromagnetic (EM) ion temperature gradient mode and intrinsic rotation generation. An odd parity component of the mode is generated by global EM effects and increases with [Formula: see text] (=plasma thermal energy/magnetic energy), enhancing the symmetry breaking and subsequent Reynolds stress [Kaang et al., Phys. Plasmas 25, 012505 (2018)]. The plasma elongation is shown to diminish the parity change via the reduction in the effective ion temperature gradient by a factor [Formula: see text], where [Formula: see text]. A quasi-linear analysis indicates that plasma elongation can weaken the generation of intrinsic torque induced by the global EM effect as a result of the decline of the parity change.