Hard X-ray Observations of Solar Flares

Dr. Säm Krucker（Dr. サム　クルッカー）
Space Sciences Laboratory, UC Berkeley & University of Applied Sciences Northwestern Switzerland

Solar flares are powered by impulsive releases of magnetic energy stored in the solar atmosphere. Hard X-ray observations reveal that as much as half of the released energy goes into acceleration of electrons. The acceleration mechanisms that provide these efficient conversions of magnetic energy into supra-thermal particles are currently not well understood. Driven by the NASA Small Explorer mission RHESSI, significant progress has been made on the observational side. After an introduction of the RHESSI indirect imaging concept, I will review observational results obtained by RHESSI, followed by a discussion on future hard X-ray instrumentation with an emphasis on hard X-ray focusing optics.

Place: Bldg. A 2F Conf. hall (1236) / A棟２階会議場（1236号室）