Abstract

ABSTRACT The track response of Lexan polycarbonate and CR-39 track detectors has been found to vary significantly with the polymer temperature during registration. This temperature effect may cause errors in cosmic ray composition experiments employing detector arrays exposed by means of high altitude balloon flights or earth orbiting spacecraft with passive temperature control. Outline results are presented for a series of exposures to high energy Fe beams at the LBL Bevalac during 1980 covering registration temperatures from −189°C to +48°C and using detector stacks sealed in an environment of dry air. Comparison is made with results from unsealed stacks and from detectors exposed in vacua.

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