Dr Romain Danneau, Karlsruhe Institute of technology, Germany
Friday 27 February 2015, 1500-1600
C1 Physics Building
Quantum transport in bilayer graphene-boron nitride van der Waals heterostructures
Doctor Simon Thomas, Space Plasma Group, Mullard Space Science Laboratory
Friday 06 March 2015, 1600-1700
Cavendish Colloquium Room
Galactic cosmic rays are extremely high energy, charged particles that are accelerated at extra-solar sources such as supernovae, active galactic nuclei, quasars, and gamma-ray bursts. They are modulated by enhancements and inhomogenities within the heliospheric magnetic field. Upon arrival at Earth's atmosphere, they produce a shower of secondary particles, some of which result in energetic neutrons which can be detected at ground level. On centennial and millennial time scales, traces of...
Professor Craig Rodger, Department of Physics, University of Otago, New Zealand
Tuesday 10 March 2015, 1600-1700
Bowland North Seminar Room 20
The space around the Earth is filled with fast moving particles trapped in two "belts" by our magnetic field. The belts were named the "Van Allen radiation belts" in 1958 honour of their discoverer, James Van Allen. Earth-orbiting satellites can be damaged or even lost due to increased high-energy electron fluxes in the Earth's radiation belts. Electron fluxes are highly variable, with fluxes changing by many orders of magnitudes on time-scales of hours to days, due to competing acceleration...