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Overview"The ideal MHD case is simpler and easier to visualize, as we can treat the field lines as being ""frozen"" to the plasma [26]. By ""frozen,"" we mean that the magnetic field must move with the plasma; as a consequence, the system can be decomposed into tubes of equal magnetic flux. If a flux tube moves radially outward, it moves into a region of lower magnetic field [27], which increases the volume of the flux tube and adiabatically cools it. For a flux tube to move outward, it must exchange places with another flux tube moving inward, whose volume will be reduced in the region of stronger magnetic field and lead to adiabatic heating. This swapping of flux tubes is known as an electrostatic interchange (or flute) instability [28]. Note that by definition there is no change to the magnetic topology and there are no parallel currents. This mode is the plasma equivalent of the Rayleigh-Taylor instability in neutral fluids, in which a heavy fluid is supported a against gravity by a lighter fluid. In neutral fluids the instability grows when the pressure gradient is anti-parallel to the gravitational force; in plasmas it grows when the pressure gradient is antiparallel to the radius of curvature of the magnetic field; such plasmas are often referred to as having ""bad"" curvature." Full Product DetailsAuthor: AnnePublisher: Tredition Gmbh Imprint: Tredition Gmbh Dimensions: Width: 15.20cm , Height: 0.70cm , Length: 22.90cm Weight: 0.177kg ISBN: 9783384267214ISBN 10: 3384267214 Pages: 112 Publication Date: 20 June 2024 Audience: General/trade , General Format: Paperback Publisher's Status: Active Availability: In Print This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |