Frequencies of the geodesic acoustic mode and Alfvén gap modes in high-q{sup 2}β plasmas with non-circular cross section

Journal Article · Sun Dec 15 00:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4846816· OSTI ID:22218342

Fesenyuk, O. P.; Kolesnichenko, Ya. I. ^[1]; Yakovenko, Yu. V. ^[1]

---

1. Institute for Nuclear Research, Prospekt Nauky 47, Kyiv 03680 (Ukraine)

This work generalizes recent results [O. P. Fesenyuk et al., Plasma Phys. Controlled Fusion 54, 085014 (2012)] to plasmas with elongated cross section. It suggests new expressions for the frequencies of the geodesic acoustic mode and Alfvén gap modes in tokamaks, with a large ratio of the plasma pressure to the magnetic field pressure and a large safety factor (q≫1, which takes place in discharges with reversed-shear configuration and, especially, in hollow-current discharges)

• OSTI ID: 22218342
• Journal Information: Physics of Plasmas, Vol. 20, Issue 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
BETA RATIO
GEODESICS
GLOW DISCHARGES
MAGNETIC FIELDS
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA PRESSURE
REVERSED SHEAR
TOKAMAK DEVICES