Observations of the magnetohydrodynamic dynamo effect in a spheromak plasma

We present measurements of the magnetohydrodynamic dynamo'' due to correlated fluctuations of velocity and magnetic field in the SPHEX spheromak. We show that there are both single-mode and turbulent dynamo processes present, although the single-mode process is in this case an antidynamo&#...

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Bibliographic Details
Published in:Physical review letters 1993-03, Vol.70 (12), p.1814-1817
Main Authors: AL-KARKHY, A, BROWNING, P. K, CUNNINGHAM, G, GEE, S. J, RUSBRIDGE, M. G
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLOSED PLASMA DEVICES
CONFINEMENT
CORRELATION FUNCTIONS
DATA
ELECTRIC FIELDS
Exact sciences and technology
EXPERIMENTAL DATA
FLUCTUATIONS
FLUID MECHANICS
FUNCTIONS
HYDRODYNAMICS
INFORMATION
MAGNETIC CONFINEMENT
Magnetic confinement and equilibrium
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MECHANICS
NUMERICAL DATA
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
PLASMA CONFINEMENT
SPHEROMAK DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS 700310 > Plasma Confinement-- (1992-)
VELOCITY
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Summary:We present measurements of the magnetohydrodynamic dynamo'' due to correlated fluctuations of velocity and magnetic field in the SPHEX spheromak. We show that there are both single-mode and turbulent dynamo processes present, although the single-mode process is in this case an antidynamo'' opposing the externally applied electric field. The size of the turbulent dynamo at the magnetic axis is close to that required to drive the toroidal current there.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.70.1814