A balloon-borne high-resolution spectrometer for observations of gamma-ray emission from solar flares

Abstract The design, development, and balloon-flight verification of a payload for observations of gamma-ray emission from solar flares are reported here. The payload incorporates a high-purity germanium semiconductor detector, standard NIM and CAMAC electronics modules, a thermally stabilized pressure housing, and regulated battery power supplies. The flight system is supported on the ground with interactive data-handling equipment comprised of similar electronics hardware. The modularity and flexibility of the payload, together with the resolution and stability obtained throughout a 30 h flight, make it readily adaptable for high-sensitivity, long-duration balloon flight applications.