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SUMMARY:Determining Solar Flare Hard X-ray Directivity using Stereoscopic 
 Observations with Solar Orbiter/STIX and Earth-Orbiting Missions - Natasha
  Jeffrey\, Northumbria University
DTSTART:20230313T140000Z
DTEND:20230313T150000Z
UID:TALK196327@talks.cam.ac.uk
CONTACT:Dr Yamini K Rao
DESCRIPTION:Solar flare particle acceleration is an extremely efficient pr
 ocess and understanding the acceleration mechanism remains a major challen
 ge in solar physics. Hard X-ray (HXR) observations provide a direct link t
 o flare-accelerated electrons and HXR directivity is a measure of the elec
 tron angular distribution\, a prime diagnostic of the unknown electron acc
 eleration mechanism\, and various transport properties in the solar corona
 . However\, to- date\, HXR directivity has been difficult to measure\, wit
 h different methods providing conflicting and often unreliable results. Ho
 wever\, with the launch of Solar Orbiter/STIX and an upcoming fleet of X-r
 ay instrumentation at Earth (e.g.\, ASO-S/HXI\, Aditya/ HEL1OS\, PADRE)\, 
 reliable stereoscopic observations measuring HXR directivity are now possi
 ble. Here\, I will discuss the importance of measuring HXR/electron direct
 ivity during flares\, show the first results of joint stereoscopic measure
 ments with Solar Orbiter/ STIX and Fermi\, and explain how the electron di
 rectivity can be extracted from observations via comparison with current e
 lectron and X-ray modelling.
LOCATION:In Person MR14
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