Collisional damping of the geodesic acoustic mode with toroidal rotation. II. Gyrokinetic formulation

Journal Article · Tue Mar 15 04:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4943284· OSTI ID:22599043

Xie, Baoyi; Yu, Jun; Chen, You ^[1]; Gong, Xueyu ^[1]; Guo, Wenfeng ^[2]

---

1. School of Mathematics and Physics, University of South China, Hengyang 421001 (China)
2. Institute of Plasma Physics, Chinese Academy of Science, Hefei 230031 (China)

The collisional damping of the geodesic acoustic mode (GAM) is analytically investigated in toroidally rotating tokamaks by using the gyrokinetic equation. It is found that the toroidal rotation could decrease the collisional damping of the GAM in the small safety factor region and increase the collisional damping of the GAM in the large safety factor region at low ion collision rate; while at high ion collision rate, the toroidal rotation will increase the collisional damping of the GAM with arbitrary safety factor. Furthermore, the change quantity of collisional damping rate of the GAM due to the toroidal rotation at high collision rate is larger than that at low collision rate.

• OSTI ID: 22599043
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 23; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DAMPING
GEODESICS
ION COLLISIONS
IONS
ROTATING PLASMA
TOKAMAK DEVICES