Patrick H. Diamond
University of California, San Diego
Tuesday, May 9, 2017, 3:15 pm
Pattern formation in magnetically confined plasmas: why it matters
This colloquium will discuss the physics of turbulent transport in magnetic confinement devices, such as tokamaks, with special emphasis on scale selection and its consequences. Using analogies with turbulent pipe flow and geophysical fluids, the basic physics of magnetized plasma turbulent transport is developed. Then, the two principle secondary patterns-avalanches and zonal shear flows-are introduced. Scale selection is linked to the natural competition between these two structures. We present the ExB staircase as the natural resolution to the competition, and discuss recent work on the bstaircase and layering dynamics. Throughout , we discuss the implications of the physics for achieving ignition in a magnetically confined plasma.
This talk is the 2017 Hiroomi Umezawa Memorial Lecture.
(Coffee and doughnuts at 3:00 pm)
Professor Manu Paranjape
Groupe de physique des particules
Université de Montréal
Friday, September 16, 2016
11 am, CCIS 4-196
Three Explorations of Gravity in the Lab
We analyze three ideas for the study of gravity in interaction with matter, which give rise to a method of measuring the speed of gravity, a method of gravitationally inducing quantum transitions and the possibility of devising a graviton laser.
2015 Mini-Symposium in Celebration of 100 Years of General Relativity and the International Year of Light