Balloon-borne electron telescope with scintillating fibers

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsBrian D. Ramsey, Thomas A. Parnell
Number of pages10
Publication statusPublished - 1996
Externally publishedYes
EventGamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions - Denver, CO, USA
Duration: 1996 Aug 51996 Aug 7


OtherGamma-Ray and Cosmic-Ray Detectors, Techniques, and Missions
CityDenver, CO, USA

ASJC Scopus subject areas

  • General Engineering


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