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SUMMARY:Creating a coronal hard X-ray source? Exploring the effect of bina
 ry collisions on electron acceleration in magnetic reconnection regions - 
 Dr. Christina Burge (British Antarctic Survey)
DTSTART:20131022T120000Z
DTEND:20131022T130000Z
UID:TALK48159@talks.cam.ac.uk
CONTACT:Dr. Jaroslav Dudik
DESCRIPTION:An unexpectedly bright\, coronal hard X-ray (HXR) source was f
 irst discovered using the HXT instrument on Yohkoh (Masuda et al. 1994) an
 d several more examples have been found in RHESSI data. These sources have
  attracted great interest particularly because they may represent the loca
 tion of the electron acceleration region. We know that electrons must unde
 rgo collisions in order to emit bremsstrahlung HXRs. Therefore self-consis
 tent models for coronal HXR sources must include collisional energy loss a
 nd scattering alongside the accelerating agent.\n\nIn this talk I will des
 cribe work aimed at including the effects of binary collisions in reconnec
 tion test particle calculations. We used a numerical method to follow test
  particle trajectories\, based on Honeycutt’s (1992) extension of the RK
 4 method to stochastic differential equations. This method led to the prod
 uction of HXR-energy electrons\, giving a viable (if highly idealised) mod
 el for coronal HXR production.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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