11 March 2003 Balloon-borne hard x-ray spectrometer for flare observations
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We present the design and initial flight results of a balloon-borne hard X-ray detector system for observing high-resolution spectra of solar flares. The instrument is designed to achieve a 3 keV energy resolution over the energy range of 15-120 keV. The instrument uses sixteen 10×10×0.5mm cadmium telluride (CdTe) detectors with indium electrodes that act as Schottky barriers. Pre-flight tests confirmed that all detectors exceeded the target 3 keV resolution. The detector system is designed to optimize radiative cooling in order to achieve the operating temperature of 0°C without refrigeration mechanisms. The first flight took place on August 29, 2001 and while no major flares were observed, the instrument operation was verified and a detector temperature of -13° C was achieved. The second flight took place on May 24, 1974 and during the 8 hours of level flight at an altitude of 41km, we succeeded in observing a class M1.1 solar flare.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ken Kobayashi, Ken Kobayashi, Saku Tsuneta, Saku Tsuneta, Tomonori Tamura, Tomonori Tamura, Kazuyoshi Kumagai, Kazuyoshi Kumagai, Yukio Katsukawa, Yukio Katsukawa, Masahito Kubo, Masahito Kubo, Takamasa Yamagami, Takamasa Yamagami, Yoshitaka Saito, Yoshitaka Saito, "Balloon-borne hard x-ray spectrometer for flare observations", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461284; https://doi.org/10.1117/12.461284


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