Fluctuations and intermittent poloidal transport in a simple toroidal plasma

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4816947· OSTI ID:22227945

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

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

In a simple magnetized toroidal plasma, fluctuation induced poloidal flux is found to be significant in magnitude. The probability distribution function of the fluctuation induced poloidal flux is observed to be strongly non-Gaussian in nature; however, in some cases, the distribution shows good agreement with the analytical form [Carreras et al., Phys. Plasmas 3, 2664 (1996)], assuming a coupling between the near Gaussian density and poloidal velocity fluctuations. The observed non-Gaussian nature of the fluctuation induced poloidal flux and other plasma parameters such as density and fluctuating poloidal velocity in this device is due to intermittent and bursty nature of poloidal transport. In the simple magnetized torus used here, such an intermittent fluctuation induced poloidal flux is found to play a crucial role in generating the poloidal flow.

• OSTI ID: 22227945
• Journal Information: Physics of Plasmas, Vol. 20, Issue 7; 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
DISTRIBUTION FUNCTIONS
FLUCTUATIONS
LANGMUIR PROBE
MAGNETIC FIELD CONFIGURATIONS
PLASMA CONFINEMENT
PLASMA DENSITY
PROBABILITY
TOKAMAK DEVICES