The next UK-SOSS talk will be held on 16th of June, 2020, 11:00 am (UK time)June 8, 2020, from Marianna Korsos
The 4th seminar will be held on 16th of June, 2020, 11:00 am (UK time)
Speaker: Prof Mitchell Berger (University of Exeter)
Title: Magnetic helicity: decompositions and methods of localization
Zoom link: https://zoom.us/j/95338171418
Meeting ID 953 3817 1418
Magnetic helicity is an ideal MHD invariant; it measures geometric and topological properties of a magnetic field. The talk will begin by reviewing helicity and its mathematical properties. It can be decomposed in several ways (for example, self and mutual helicity, Fourier spectra, field line helicity, linking, twist, and writhe). The talk will also review methods of measuring the helicity flux, as well as applications in solar and stellar astrophysics.
I will then discuss some new developments in measuring localized concentrations of helicity in a well-defined, gauge invariant manner, using wavelets.
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The UK-SOSS is supported by Aberystwyth University and Queen’s University Green Fund
Marianna Korsos, JiaJia Liu and Chris Nelson