Plasma Physics Seminar

April 16, 2018 - 1:30pm
309 VAN

"Determining Particle Energization in Weakly Collisional Plasmas Using the Field-Particle Correlation Technique" by Professor Gregory Howes, Department of Physics & Astronomy, The University of Iowa

Abstract:  Understanding the removal of energy from turbulent fluctuations in a magnetized plasma and the consequent energization of the constituent plasma particles is a major goal of plasma physics and heliophysics. Under the weakly collisional conditions typical of the solar wind plasma, kinetic theory dictates that the energy of turbulent fluctuations of the electromagnetic fields and plasma flows is removed collisionlessly through interactions between the electromagnetic fields and the individual motions of the charged particles that make up the plasma.  We present the fundamentals of the recently developed field-particle correlation technique, and show examples from nonlinear kinetic numerical simulations of how it can be used with single-point measurements to distinguish and characterize different collisionless particle energization mechanisms.