title: Influence of energetic ions on tearing modes.
abstract: In contrast with the stability effects of trapped energetic ions on tearing modes, the effects of circulating energetic ions (CEI) on tearing modes depend on the toroidal circulating direction, and are closely related to the momentum of energetic ions. CEI provide an additional source or sink of momentum to affect tearing modes. For co-CEI, tearing modes can be stabilized if the momentum of energetic ions is large enough. On the other hand, the growth of tearing modes can be enhanced by counter-CEI. Further, a possibility to suppress the island growth of neoclassical tearing modes by co-CEI is pointed out.
authors.affiliation: Department of Modern Physics, School of Physical Sciences, University of Science and Technology of China, Hefei, People's Republic of China.
authors.forename: Huishan
authors.initials: H
authors.lastname: Cai
authors.forename: Shaojie
authors.initials: S
authors.lastname: Wang
authors.forename: Yinfeng
authors.initials: Y
authors.lastname: Xu
authors.forename: Jintao
authors.initials: J
authors.lastname: Cao
authors.forename: Ding
authors.initials: D
authors.lastname: Li