At 14:00 on Wednesday June 9th, 2021, Dr Andrew Wright from the University of St Andrews will be presenting a seminar titled: “What can Magnetic Helicity tell us about Reconnected Magnetic Fields?”. The seminar will be accessible via Teams.
Abstract: “Helicity is a measure of the topology of a system and measures the linkage of a set of lines. The development of key concepts has been motivated by purely theoretical questions as well as by applications to DNA, vortex tubes and magnetic fields. After reviewing the basic properties we consider some applications in Magnetohydrodynamics (MHD) where an initial magnetic field can reconfigure (through reconnection) and ask what Helicity can tell us about the final configuration. In most cases the resulting magnetic fields will be composed of flux tubes that have gained some twist, and we provide formulae for the amount of twist gained in several generic cases and compare with MHD simulations. Estimating the twist of magnetic flux tubes has implications for their stability.”
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