Lobachevsky State University
Lobachevsky State University
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAK SCI004000 Astronomy
BISAK SCI005000 Physics / Astrophysics
The compact experimental setup ``Solar Wind'' (IAP RAS) is designed for modeling plasma processes in a magnetic arch of the coronal solar loop type. Arc discharges at the bases of the arch create plasma with a significantly increased ionic temperature along the magnetic force line. Optical images show that the plasma rope is stratified into two belts along the upper and lower vaults of the arch or as a near-wall cylindrical layer. The system stratifies when the longitudinal ionic pressure at the top of the loop is 2 times the magnetic pressure. The indicated pressure ratio coincides with the threshold value for the development of the fire-hose instability of the Alfven wave in a plasma with temperature anisotropy. We propose a variant of the growing torsional Alfven oscillation as a mechanism for the formation of a cylindrical layer along the plasma tube wall.
instabilities; magnetohydrodynamics; plasmas; Sun: coronal mass ejections, filaments, prominences
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