Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Affiliates 
 Alumni 
 Visitors 
 Students 
 Research 
 ICAM-LANL 
 Quantum 
 Publications 
 Publications 
 2007 
 2006 
 2005 
 2004 
 2003 
 2002 
 2001 
 2000 
 <1999 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Colloquia 
 Colloquia Archive 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 CMS Colloquia 
 Q-Mat Seminars 
 Q-Mat Seminars Archive 
 Archive 
 Kac Lectures 
 Dist. Quant. Lecture 
 Ulam Scholar 
 Colloquia 
 
 Jobs 
 Students 
 Summer Research 
 Student Application 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 PD Travel Request 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Thursday, March 26, 2015
2:00 PM - 3:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Postdoc Seminar

Electron Trapping and Equations of State during Magnetic Reconnection

Ari Le
XCP-6

Magnetic reconnection energizes electrons in space plasmas, and the effective heating can be highly anisotropic. The electron temperature parallel to the magnetic field may rise to several times the perpendicular temperature. Adiabatic electron trapping turns out to play a major role in this process. I will review a general analytic model for the distribution of particles trapped by slowly varying fields and discuss when it is applicable to the electrons in a reconnection geometry. Derived from this kinetic model, a fluid closure gives equations of state for the electron pressure components. The new fluid model helps explain structures observed in kinetic simulations and in spacecraft measurements of reconnecting current sheets. In addition, the model predicts that the electron temperature will rise by the largest factor when the electron pressure is much smaller than the magnetic pressure.

Host: Jeffrey Hyman