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A long-duration balloon payload for hard X-ray and gamma-ray observations of the sun |
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| Authors: | Lin R P Curtis D W Primbsch J H Harvey P R Levedahl W K Smith D M Pelling R M Duttweiler F Hurley K |
| Institution: | 1.Space Sciences Laboratory, University of California, 94720, Berkeley, CA, USA ;2.CASS, University of California, San Diego, USA ;3.CESR, Toulouse, USA ; |
| Abstract: | We describe a balloon payload designed to study the processes of energy release, particle acceleration, and heating of the active corona, in hard X-ray microflares and normal flares. An array of liquid nitrogen-cooled germanium detectors together with large area phoswich scintillation detectors provide the highest sensitivity (～500 cm2) and energy resolution (≤0.7 keV) ever achieved for solar hard X-ray (～15–600 keV) measurements. These detectors were flown in February 1987 from Australia on a long duration RAdiation COntrolled balloON (RACOON) flight (LDBF) which provided 12 days of observations before cutdown in Brazil. The payload includes solar cells for power, pointing and navigation sensors, a microprocessor controlled data system with VCR tape storage, and transmitters for GOES and ARGOS spacecraft. This successful flight illustrates the potential of LDBF's for solar flare studies. |
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