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| Particle Acceleration in Solar Flares |
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What:
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Particle Acceleration in Solar Flares |
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Who: |
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( Space Science Laboratory, University of California, Berkeley ) |
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When: |
Wednesday morning ,July 29th,10:30 a.m. |
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Where: |
Room 519, Office Block, 2 West Beijing Road (PMO, CAS)
Welcome to attend
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abstract
Solar flares are powered by impulsive releases of magnetic energy stored in the corona. Hard X-ray and gamma-ray observations reveal that as much as half of the released energy goes into particle acceleration. The acceleration mechanisms that provide these efficient conversions of magnetic energy into supra-thermal particles are currently not understood. In the past years however, significant progress has been made on the observational side; thanks in particular to observations by Reuven Ramaty High Energy Spectroscopic Imager (RHESSI), a NASA small explorer mission. RHESSI provides imaging spectroscopy from 3 keV up to 10 MeV allowing us to quantitatively study hard X-ray bremsstrahlung emissions from flare-accelerated electrons, and gamma-ray emissions from flare-accelerated ions. After an extensive introduction, I will review recent observational results obtained by RHESSI. Furthermore, I will briefly describe future instrumentation including a sounding rocket experiment called FOXSI to be launch in 2010 that will test hard X-ray focusing optics for solar observations.
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Copyright？ Purple Mountain Observatory, CAS, No.10 Yuanhua Road, Qixia District, Nanjing 210023, China
Phone: 0086 25 8333 2000 Fax: 8333 2091 http://english.pmo.cas.cn |
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