Balloon-borne electron telescope with scintillating fibers

Shoji Torii; J. Nishimura; Katsuaki Kasahara; Nobuhito Tateyama; Tadahisa Tamura; Kenji Yoshida; Takamasa Yamagami; Shigeo Ohta; Mitiyoshi Namiki; Tadashi Kobayashi; Hiroyuki Murakami; Toshinori Yuda

doi:10.1117/12.253974

18 October 1996 Balloon-borne electron telescope with scintillating fibers

Shoji Torii, J. Nishimura, Katsuaki Kasahara, Nobuhito Tateyama, Tadahisa Tamura, Kenji Yoshida, Takamasa Yamagami, Shigeo Ohta, Mitiyoshi Namiki, Tadashi Kobayashi, Hiroyuki Murakami, Toshinori Yuda

Author Affiliations +

Proceedings Volume 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions; (1996) https://doi.org/10.1117/12.253974
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

We describe a new balloon-borne cosmic-electron telescope that incorporates a trigger system and an imaging calorimeter. It is designed to observe high-energy electrons with an energy greater than 10 GeV. The rejection of the background protons is performed by using the trigger system in real time and the off-line analysis of three-dimensional shower profiles observed in the imaging calorimeter. The calorimeter consists of scintillating-fiber belts, emulsion plates and lead plates (approximately 8r.1.thick in total). In order to observe the direction of showers, two belts in each depth are set at right angles with each other. Image intensifier is used to amplify the number of photons from scintillating fibers, and CCD camera is attached at the output window of the image intensifier. The telescope was launched at Sanriku Balloon Center, and it was flown for 12 hours at the level altitude. By preliminary analysis, we observed about 700 electrons over 10 GeV under 4g cm^-2 of average residual atmosphere. The flux of electrons is consistent with previous observations.

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Shoji Torii, J. Nishimura, Katsuaki Kasahara, Nobuhito Tateyama, Tadahisa Tamura, Kenji Yoshida, Takamasa Yamagami, Shigeo Ohta, Mitiyoshi Namiki, Tadashi Kobayashi, Hiroyuki Murakami, and Toshinori Yuda "Balloon-borne electron telescope with scintillating fibers", Proc. SPIE 2806, Gamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions, (18 October 1996); https://doi.org/10.1117/12.253974

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