Earths Magnetosphere Plasma Accelerations Research
Research explores plasma accelerations in Earth's magnetosphere, including the generation process, impact of magnetic field interactions, and implications for space weather. Investigators study reconnection phenomena and accelerated flows to understand energy transfer mechanisms within the magnetosheath.
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Presentation Transcript
Earths Magnetosphere: Plasma accelerations outside the magnetotail Claire Kuang Mentor: Dr. David Sibeck
How are plasma accelerations generated? Field lines that encounter the magnetopause are temporarily slowed and stretched Results in a sling shot effect in plasma further down as lines are pulled along the sides
Current research: Lavraud Strong accelerated flows in the magnetosheath that equal or exceed solar wind velocity Strong bulk plasma acceleration in Earth s magnetosheath: A magnetic slingshot effect? B. Lavraud, published 18 July 2007.
My research: using magnetohydrodynamic models in CCMC s database z Community Coordinated Modeling Center y Dayside reconnection line data from last summer x Identify locus of points from which accelerated flows diverge for each IMF angle parameter 0 45 y 90 Relate flows to reconnection line tilt 135 z
What is reconnection? Reconnection occurs at the boundary between two different magnetic fields Transfers energy from the sun into the magnetosphere
IMF angle = 90 IMF angle = 135 IMF angle = 180
IMF = 45 IMF = 135
IMF angle rotates from 0 (north) to 90 (dusk)
Conclusion Locations of accelerated flows outside the tail consistent with reconnection line tilt Flow velocity only exceeds solar wind velocity for distances greater than 10 Re tailward from Earth southward IMF clock angles
Thanks to: Dr. David Sibeck and Masha Kuznetsova Dr. Ekaterina Verner SESI and Catholic University
