[IGPP Everyone] Reminder - SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR - Fall Quarter - Friday November 6, 2020 - 3:30pm - UCLA Zoom

[Marjorie Sowmendran]

R E M I N D E R - 11/6/2020 

SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR 




ZOOM LINK PROVIDED BELOW 








https://ucla.zoom.us/j/93382900867?pwd=TlVQRmZyVEJFa0FCZWlRMU0yREtjUT09 







Date/Time: November 6, 2020/ 03:30 PM Pacific Time (US and Canada) 







SPACE PHYSICS and HERMES SCIENCE CENTER SEMINAR 







DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES 

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES 

UNIVERSITY OF CALIFORNIA, LOS ANGELES 







Combining fully kinetic ions with gyrokinetic electrons – particle simulation with a realistic mass ratio 



Yu Lin, 

Auburn University 




A gyrokinetic electron and fully kinetic ion (GeFi) particle simulation model [ Lin et al. , PPCF, 2005, 2011] has been developed and utilized for investigation of magnetic reconnection under a strong guide field and a realistic ion-to-electron mass ratio. In this model, the rapid electron cyclotron motion is removed, while retaining the finite electron Larmor radii, wave-particle interaction, and off-diagonal components of the electron pressure tensor. This treatment results in a larger time step and allows one to treat the realistic ion-to-electron mass ratio m i /m e in a large-scale system. The model is particularly suitable for < e and k || /k ⊥ <1, and for problems in which the wave modes ranging from Alfven waves to lower-hybrid/whistler waves need to be handled on an equal footing. In this talk, we introduce the GeFi model and show 3D simulations of reconnection in a strong magnetic field, with B G /B 0 >>1 (where B G and B 0 are the guide and the anti-parallel component of magnetic field, respectively), as in the solar and laboratory plasmas,. The simulation is carried out for a force free current sheet. Secondary instabilities excited near the separatrix region of the magnetic island are also analyzed. 




Friday, November 6, 2020 

3:30 - 5:00 PM 



In-Charge: Marco Velli 













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