Polar patrol balloon

Nishimura, Jun; Yajima, N.; Akiyama, H.; Ejiri, Masaki; Fujii, Ryoichi; Kokubun, S.

doi:10.2514/3.46645

Cited by 10 publications

(1 citation statement)

References 2 publications

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“…The PPB has a capability to realize a flight for 2 − 4 weeks in one round of the Antarctica at an altitude of ∼35 km. The PPB project is carried out by the inter-university collaboration with Institute of Space and Astronautical Science (ISAS), JAXA and National Institute of Polar Research (NIPR) [8,9].…”

Section: Introductionmentioning

confidence: 99%

High-energy electron observations by PPB-BETS flight in Antarctica

Torii,

Yamagami,

Tamura

et al. 2008

Preprint

160

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We have observed cosmic-ray electrons from 10 GeV to 800 GeV by a long duration balloon flight using Polar Patrol Balloon (PPB) in Antarctica. The observation was carried out for 13 days at an average altitude of 35 km in January 2004. The detector is an imaging calorimeter composed of scintillating-fiber belts and plastic scintillators inserted between lead plates with 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. From the long duration balloon observations, we derived the energy spectrum of cosmic-ray electrons in the energy range from 100 GeV to 800 GeV. In addition, for the first time we derived the electron arrival directions above 100 GeV, which is consistent with the isotropic distribution.

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Section: Introductionmentioning

confidence: 99%