MHD ballooning instability in the plasma sheet
نویسندگان
چکیده
منابع مشابه
UW-CPTC 08-11 Initiation of ballooning instability by reconnection in the near-Earth plasma sheet
In this work, an alternative scenario for the substorm onset process is proposed, based on ideal ballooning stability analysis of the near-Earth plasma sheet during the March 23, 2007 THEMIS substorm event. In this scenario, the ballooning instability is initiated by the magnetic reconnection in the near-Earth plasma sheet, which in turn directly contributes to the trigger of a full onset. Usin...
متن کاملNon-ideal MHD ballooning modes in three-dimensional configurations
A linear stability theory of non-ideal MHD ballooning modes is investigated using a two fluid model for arbitrary three-dimensional electron-ion plasmas. Resistive-inertia ballooning mode (RIBM) eigenvalues and eigenfunctions are calculated for a variety of equilibria including axisymmetric shifted circular geometry (s − α model) and configurations of interest to the Helically Symmetric Stellar...
متن کاملUW-CPTC 09-1 Initiation of ballooning instability in the near-Earth plasma sheet prior to the March 23, 2007 THEMIS substorm expansion onset
In this work, we analyze the ballooning stability of the near-Earth plasma sheet prior to the initial expansion onset of the March 23, 2007 THEMIS substorm event. Using solar wind data from WIND satellite observation for the substorm event as an input at dayside, we reconstructed a sequence of global magnetospheric configurations around the expansion onset by means of OpenGGCM simulation. These...
متن کاملPrepared for the U.s. Department of Energy, under Contract De-ac02-76ch03073 Princeton Plasma Physics Laboratory Princeton University, Princeton, New Jersey
Based on the ideal MHD model the stability of ballooning modes is investigated by employing realistic 3D magnetospheric equilibria, in particular for the substorm growth phase. Previous MHD ballooning stability calculations making use of approximations on the plasma compressibility can give rise to erroneous conclusions. Our results show that without making approximations on the plasma compress...
متن کاملExponential growth of nonlinear ballooning instability.
Recent ideal magnetohydrodynamic (MHD) theory predicts that a perturbation evolving from a linear ballooning instability will continue to grow exponentially in the intermediate nonlinear phase at the same linear growth rate. This prediction is confirmed in ideal MHD simulations. When the Lagrangian compression, a measure of the ballooning nonlinearity, becomes of the order of unity, the interme...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2004
ISSN: 0094-8276
DOI: 10.1029/2003gl018823