Scrape-off layer tokamak plasma turbulence

Journal Article · Tue May 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4718714· OSTI ID:22072341

Bisai, N; Singh, R; Kaw, P K ^[1]

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

Two-dimensional (2D) interchange turbulence in the scrape-off layer of tokamak plasmas and their subsequent contribution to anomalous plasma transport has been studied in recent years using electron continuity, current balance, and electron energy equations. In this paper, numerically it is demonstrated that the inclusion of ion energy equation in the simulation changes the nature of plasma turbulence. Finite ion temperature reduces floating potential by about 15% compared with the cold ion temperature approximation and also reduces the radial electric field. Rotation of plasma blobs at an angular velocity about 1.5 Multiplication-Sign 10{sup 5} rad/s has been observed. It is found that blob rotation keeps plasma blob charge separation at an angular position with respect to the vertical direction that gives a generation of radial electric field. Plasma blobs with high electron temperature gradients can align the charge separation almost in the radial direction. Influence of high ion temperature and its gradient has been presented.

• OSTI ID: 22072341
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR VELOCITY
ELECTRIC FIELDS
ELECTRON TEMPERATURE
ELECTRONS
ION TEMPERATURE
PLASMA
PLASMA SCRAPE-OFF LAYER
ROTATION
TEMPERATURE GRADIENTS
TOKAMAK DEVICES
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS