1. Study of >100GeV electrons with BETS detector using a long duration balloon flight in Antarctica
- Author
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Torii, S., Yoshida, K., Tamura, T., Kitamura, H., Yamagami, T., Tateyama, N., Anraku, K., Yamashita, T., Chang, J., Nishimura, J., Saito, Y., Ohta, S., Namiki, M., Matsuzaka, Y., Iijima, I., Yamagishi, H., Kadokura, A., Kasahara, K., Ogawa, S., and Fujii, M.
- Subjects
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PARTICLES (Nuclear physics) , *CATHODE rays , *MONTE Carlo method - Abstract
Abstract: We have observed cosmic-ray electrons from 10 to 1000GeV by a long duration balloon flight using Polar Patrol Balloon (PPB) in Antarctica. The observation was carried out for 13 days at an altitude of 35km in January 2004. The detector is an imaging calorimeter composed of scintillating-fiber belts and plastic scintillators inserted between lead plates. The geometrical factor of detector is about 600cm2sr and the total thickness of lead absorber is 9 radiation lengths. The performance of the detector has been confirmed by the CERN-SPS beam test and also investigated by Monte-Carlo simulations. New telemetry system using a commercial satellite of iridium, power supply by solar batteries, and automatic level control using CPU have successfully been developed and operated during the flight. We have collected 5.7×103 events over 100GeV including nearly 100 candidates of primary electrons. [Copyright &y& Elsevier]
- Published
- 2006
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