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Preliminary Exam

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Events During the Week of May 14th through May 21st, 2023

Monday, May 15th, 2023

No events scheduled

Tuesday, May 16th, 2023

No events scheduled

Wednesday, May 17th, 2023

Investigating the Collisionless Kinetic Regime with the New TREX Drive Cylinder
Time: 11:00 am - 1:00 pm
Place: B343 Sterling
Speaker: Paul Gradney
Abstract: The Terrestrial Reconnection EXperiment (TREX) at the Wisconsin Plasma Physics Laboratory (WiPPL) can reliably reach the collisionless kinetic regime by driving an induced magnetic field through a cylindrical coil geometry. The enhanced drive reduces the effects of collisionality in the experiment, such that electron pressure anisotropy is expected to develop unimpeded by Coulomb collisions. Comparing the upgraded Drive Cylinder to the previous 4-coil TREX configuration, the reconnection current layer is a factor of two longer, with an absolute system size of L/di = 15, and increases the reconnection rate from Erec ~ 100V/m to 900V/m. These improved parameters allow the Drive Cylinder to reach a Lundquist number of S = 10^5, the highest value achieved by a dedicated reconnection experiment. In this parameter space, the Drive Cylinder can explore plasma physics dynamics that are more applicable to the collisionless settings in many space physics phenomenon, such as planetary magnetospheres.
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Thursday, May 18th, 2023

Gravitational particle production in inflationary models using Stokes phenomenon
Time: 1:00 pm - 3:00 pm
Place: 2223 Chamberlin
Speaker: Nidhi Sudhir Kandathpatinharuveetil, Department of Physics Graduate Student
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Friday, May 19th, 2023

No events scheduled