Other
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..19..743w&link_type=abstract
Advances in Space Research, Volume 19, Issue 5, p. 743-746.
Other
Scientific paper
In 1991, the Berkeley-IKI Trek detectors, consisting of stacks of BP-1 track-etch glass, were deployed on the Russian space station Mir. Trek consists of two distinct instruments: one, with the goal of the measurement of the isotopic abundances of iron and nickel in the GCR, was placed on the outside wall of the living quarters of Mir; the other, designed to measure the elemental abundances of the ultraheavy GCR, was placed outside the space station by cosmonauts, and returned in two installments in 1994 and in 1995, by dedicated re-entry capsule and shuttle Atlantis respectively. The analysis of the first detector is now complete, and the results have been accepted by Astrophysical Journal for publication (Westphal et al. 1996). The goal of the Large Trek Detector is to measure the elemental composition of galactic cosmic rays with Z > 50 and E > 300 A MeV, with an energy-dependent charge resolution of better than 0.35e. We report on recent calibrations of Trek done at the Alternating Gradient Synchrotron at Brookhaven National Laboratory; describe recent measurements of the track-fading properties of BP-1; describe a recently completed stroboscopic scanning system which has dramatically improved our scanning speed; and report on the first set of observations from Trek of the elemental composition of the Ultraheavy Galactic Cosmic Rays.
Afanasyev V. G.
Akimov Vladlen V.
Baryshnikov K.
Buford Price P.
Gorshkov L. A.
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