Role of ion mass in the generation of fluctuations and poloidal flows in a simple toroidal plasma

Journal Article · Sun Jul 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4737156· OSTI ID:22072549

Goud, T S; Ganesh, R; Saxena, Y C; Raju, D ^[1]

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1. Institute for Plasma Research, Gandhinagar 382428 Gujarat (India)

Generation of fluctuations and poloidal flow is investigated in a simple toroidal plasma, at a given magnetic field strength for varying ion masses. Under similar discharge conditions, the fluctuation induced poloidal flux is found to decrease with increasing ion mass. Consequently, the absolute net poloidal flow velocity is found to scale down systematically with increase in the ion mass. The net poloidal flow in units of ion acoustic velocity is, however, comparable for all masses on the low field side and shows minor variations on the high field side. The frequency of the first harmonic in the density and potential power spectra is found to decrease with decreasing absolute net flow. A transition occurs in the fluctuation behavior from highly coherent state to a turbulent state with increase in the ion mass, from argon to xenon.

• OSTI ID: 22072549
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANNIHILATION OPERATORS
ARGON
EIGENSTATES
ELECTRIC DISCHARGES
ENERGY SPECTRA
FLUCTUATIONS
ION ACOUSTIC WAVES
IONS
MAGNETIC FIELDS
PLASMA
PLASMA CONFINEMENT
TOROIDAL CONFIGURATION
XENON