scholarly journals Criterion for interchange instability in a plasma connected to a conducting ionosphere

2007 ◽  
Vol 112 (A12) ◽  
pp. n/a-n/a ◽  
Author(s):  
X. Xing ◽  
R. A. Wolf
Keyword(s):  
Interchange Instability

scholarly journals Effect of interchange instability on magnetic reconnection

2013 ◽  
Vol 20 (3) ◽  
pp. 365-377 ◽  
Author(s):  
W. Lyatsky ◽  
M. L. Goldstein
Keyword(s):  
Magnetic Fields ◽  
Electric Field ◽  
Magnetic Reconnection ◽  
Plasma Flow ◽  
Buoyancy Force ◽  
Strong Turbulence ◽  
Polarization Electric Field ◽  
Interchange Instability ◽  
Reconnection Layer ◽  
Fast Reconnection

Abstract. We present here the results of a study of interacting magnetic fields that involves a force normal to the reconnection layer. In the presence of such force, the reconnection layer becomes unstable to interchange disturbances. The interchange instability results in formation of tongues of heated plasma that leaves the reconnection layer through its wide surface rather than through its narrow ends, as is the case in traditional magnetic reconnection models. This plasma flow out of the reconnection layer facilitates the removal of plasma from the layer and leads to fast reconnection. The proposed mechanism provides fast reconnection of interacting magnetic fields and does not depend on the thickness of the reconnection layer. This instability explains the strong turbulence and bidirectional streaming of plasma that is directed toward and away from the reconnection layer that is observed frequently above reconnection layers. The force normal to the reconnection layer also accelerates the removal of plasma islands appearing in the reconnection layer during turbulent reconnection. In the presence of this force normal to the reconnection layer, these islands are removed from the reconnection layer by the "buoyancy force", as happens in the case of interchange instability that arises due to the polarization electric field generated at the boundaries of the islands.

Io torus plasma transport under interchange instability and flow shears

2012 ◽  
Vol 62 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Yasutaka Hiraki ◽  
Fuminori Tsuchiya ◽  
Yuto Katoh
Keyword(s):  
Plasma Transport ◽  
Interchange Instability

scholarly journals Analysis Method for the Low-Order Resistive Interchange Instability in LHD with Stochastic Magnetic Field Line Structure

2013 ◽  
Vol 8 (0) ◽  
pp. 2403157-2403157 ◽  
Author(s):  
Ryosuke UEDA ◽  
Masahiko SATO ◽  
Kiyomasa WATANABE ◽  
Yutaka MATSUMOTO ◽  
Yasuhiro SUZUKI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Magnetic Field Line ◽  
Analysis Method ◽  
Line Structure ◽  
Interchange Instability ◽  
Stochastic Magnetic Field ◽  
Low Order

To the Interchange Instability Criterion in the Magnetosphere in the Presence of Velocity Shear

2020 ◽  
Vol 125 (10) ◽  
Author(s):  
George V. Khazanov ◽  
Emanuel N. Krivorutsky ◽  
Margaret W. Chen ◽  
Colby L. Lemon
Keyword(s):  
Velocity Shear ◽  
Instability Criterion ◽  
Interchange Instability

scholarly journals Flux Tube Shredding and its Infrared Signature

1994 ◽  
Vol 154 ◽  
pp. 459-463
Author(s):  
M. Bünte ◽  
O. Steiner ◽  
S.K. Solanki ◽  
V.J. Pizzo
Keyword(s):  
Magnetic Flux ◽  
Flux Tube ◽  
Flux Tubes ◽  
Infrared Signature ◽  
Magnetic Tension ◽  
Magnetic Flux Tubes ◽  
Interchange Instability

The interchange instability of solar magnetic flux tubes and possible stabilization mechanisms are reviewed. Special attention is paid to the influence of magnetic tension forces and the internal atmosphere, both of which were neglected in earlier studies of this instability. It is found that whirl flows with velocities of only 2.2 km s–1 are strong enough to stabilize the flux tubes. However, their absence or the excitation of other instabilities might lead to a shredding of the tubes. The observability of such a scenario in the infrared is briefly discussed.

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