Design and construction of a Cherenkov imager for charge measurement of nuclear cosmic rays

Details Design and construction of a Cherenkov imager for charge measurement of nuclear cosmic rays Design and construction of a Cherenkov imager for charge measurement of nuclear cosmic rays

2011-03-07

arxiv.org/abs/1103.1321v3

2011 JINST 6 P06004

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

24 pages, 19 figures

Scientific paper

10.1088/1748-0221/6/06/P06004

A proximity focusing Cherenkov imager called CHERCAM, has been built for the charge measurement of nuclear cosmic rays with the CREAM instrument. It consists of a silica aerogel radiator plane across from a detector plane equipped with 1,600 1" diameter photomultipliers. The two planes are separated by a ring expansion gap. The Cherenkov light yield is proportional to the charge squared of the incident particle. The expected relative light collection accuracy is in the few percents range. It leads to an expected single element separation over the range of nuclear charge Z of main interest 1 < Z < 26. CHERCAM is designed to fly with the CREAM balloon experiment. The design of the instrument and the implemented technical solutions allowing its safe operation in high altitude conditions (radiations, low pressure, cold) are presented.

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