Polar balloon experiment for astrophysics research (Polar Bear)

Details Polar balloon experiment for astrophysics research (Polar Bear) Polar balloon experiment for astrophysics research (Polar Bear)

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2147b&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

A new balloon experiment is proposed for a long duration flight around the North Pole. The primary objective of the experiment is to measure the elemental energy spectra of high-energy cosmic rays in the region up to 1015 eV. The proposed instrument involves the combination of a large collecting area (≈1×1m2 ) KLEM (Kinematic Lightweight Energy Meter) device with an ionization calorimeter having a smaller collecting area (≈ 0.5×0.5 m2 ) and integrated beneath the KLEM apparatus. This combination has several important advantages. Due to the large aperture (>2 m2 sr) of the KLEM device a large exposure factor can be achieved with a long duration balloon flight (2-4 weeks). The calorimeter will collect about 10% of the events already registered by KLEM and provide effective cross-calibration for both energy measurement methods. Details of the experiment and its astrophysical significance will be presented.

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