The AMS-RICH velocity and charge reconstruction

Details The AMS-RICH velocity and charge reconstruction The AMS-RICH velocity and charge reconstruction

2007-09-13

arxiv.org/abs/0709.2154v1

Proceedings of the ICRC 2007, Merida, Mexico

Astronomy and Astrophysics

Astrophysics

Contribution to the ICRC07, Merida, Mexico (2007); Presenter: F. Barao

Scientific paper

The AMS detector, to be installed on the International Space Station, includes a Ring Imaging Cerenkov detector with two different radiators, silica aerogel (n=1.05) and sodium fluoride (n=1.334). This detector is designed to provide very precise measurements of velocity and electric charge in a wide range of cosmic nuclei energies and atomic numbers. The detector geometry, in particular the presence of a reflector for acceptance purposes, leads to complex Cerenkov patterns detected in a pixelized photomultiplier matrix. The results of different reconstruction methods applied to test beam data as well as to simulated samples are presented. To ensure nominal performances throughout the flight, several detector parameters have to be carefully monitored. The algorithms developed to fulfill these requirements are presented. The velocity and charge measurements provided by the RICH detector endow the AMS spectrometer with precise particle identification capabilities in a wide energy range. The expected performances on light isotope separation are discussed.

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