Toroidal mode conversion in the ICRF

Electron Heating by ICRF Mode-Conversion Heating in LHD

Electron heating regime using with radio-frequency waves in the ion cyclotron range of frequencies (ICRF) has been investigated in helical magnetic configuration. Mode-conversion scenario was applied to the LHD plasmas. When the wave frequency is change to be lower than that in the standard ICRF heating (minority ion heating) condition, the resonance layers are moved away to the peripheral regi...

Investigation of ICRF mode conversion at the ion-ion hybrid layer in Alcator C-Mod

Mode conversion (MC) of long wavelength fast electromagnetic magnetosonic waves (fast wave, or FW) into shorter wavelength electrostatic (ion-Bernstein, or IBW) or slow electromagnetic (ion cyclotron, or ICW) waves is of great interest in laboratory, magnetic fusion and space physics experiments. Such processes are particularly important in multi-ion species plasmas. In this paper we report rec...

Parameter Scalings of ICRF Mode Conversion Flow Drive in Alcator C-Mod Plasmas

Observations of Toroidal Rotation Suppression with ITB Formation in ICRF and Ohmic H-mode Alcator C-Mod Plasmas

Co-current central toroidal rotation has been observed in Alcator C-Mod plasmas with on-axis ICRF heating. The rotation velocity increases with plasma stored energy and decreases with plasma current. Very similar behavior has been seen during Ohmic H-modes, which suggests that the rotation, generated in the absence of an external momentum source, is not principally an ICRF effect. A scan of the...

Ballooning mode spectrum in general toroidal systems

Articles you may be interested in Anderson-localized ballooning modes in general toroidal plasmas A WKB formalism for constructing normal modes of short-wavelength ideal hydromagnetic, pressure-dnven mstabthtles (balloomng modes) in general toroidal magnetic containment devices with sheared magnetic fields is developed. No incompressibility approximation is made. A dispersion relation is obtain...