[IGPP Everyone] TODAY! Space Physics Seminar Fri. 1/29, 3:30pm: Configuration of the Magnetotail Current Sheet (A. Artemyev, UCLA EPSS)

[Emmanuel V. Masongsong]

SPACE PHYSICS SEMINAR 

DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES 

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES 

UNIVERSITY OF CALIFORNIA, LOS ANGELES 

(EPSS M288A, AOS M275A ) 







Anton Artemyev 


UCLA EPSS/IGPP 



Configuration of the Magnetotail Current Sheet 



My presentation is devoted to the magnetic field configuration and distributions of plasma thermal pressure in the magentotail current sheet. We use THEMIS spacecraft observations of the magnetotail current sheet within the downtail region 35RE>r>9R. We collect statistics of current sheets where the current density amplitude jy (in the GSM system) can be estimated owing to measurements of the flapping velocity of the current sheet vertical motion. The current sheet thickness LCS is restored using estimates of the current density amplitude and magnetic field measurements. Observed current sheets are very stretched with the typical scale of the inhomogeneity along x-axis much larger than LCS. The direct comparison of the tension force ~jyBz/c (with Bz is the magnetic field component) and the radial gradient of the plasma pressure demonstrates that this gradient cannot balance the magnetotail current sheet. We discuss other possible mechanisms responsible for the balancing of the magnetotail current sheet and compare obtained results with existing current sheet models. 




Friday, January 29, 2016 

Room 6704 Geology 

3:30 - 5:00 PM 



Refreshments served after the seminar in Room 6850. 



In-Charge 
V. Angelopoulos 


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