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Record Details

Record 8 of 5009
Relaxation of magnetotail plasmas
Author and Affiliation:
Bhattacharjee, A.(Columbia University, New York, United States)
Abstract: A quasi-thermodynamic model is presented for the relaxation of magnetotail plasmas during substorms, followed by quiet times. It is proposed that the plasma relaxes to a state of low-potential energy subject to a small number of global constraints. The constraints are exactly preserved by all ideal motions and, approximately, by a wide class of motions of the plasma undergoing magnetic reconnection. A variational principle which minimizes the free energy predicts the relaxed state. Exact, two-dimensional solutions of the relaxed state are obtained. A universal feature of the exact solutions is a chain of magnetic islands along the tail axis. Sufficient conditions for the stability of relaxed states are obtained from the second variation of the free-energy functional.
Publication Date: May 01, 1987
Document ID:
19870053937
(Acquired Nov 28, 1995)
Accession Number: 87A41211
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); 92; 4735-473
Publisher Information: United States
Contract/Grant/Task Num: NAGW-894
Financial Sponsor: NASA; United States
Organization Source: Columbia Univ.; New York, NY, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GEOMAGNETIC TAIL; MAGNETIC RELAXATION; MAGNETIC STORMS; SPACE PLASMAS; VARIATIONAL PRINCIPLES; CARTESIAN COORDINATES; ENTROPY; MAGNETIC FLUX
Imprint And Other Notes: Journal of Geophysical Research (ISSN 0148-0227), vol. 92, May 1, 1987, p. 4735-4739.
Availability Source: Other Sources
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