Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Ring Imaging Cherenkov detector of the AMS experiment: test beam
  results with a prototype   The Alpha Magnetic Spectrometer (AMS) to be installed on the International
Space Station (ISS) will be equipped with a proximity Ring Imaging Cherenkov
(RICH) detector for measuring the velocity and electric charge of the charged
cosmic particles. This detector will contribute to the high level of redundancy
required for AMS as well as to the rejection of albedo particles. Charge
separation up to iron and a velocity resolution of the order of 0.1% for singly
charged particles are expected. A RICH protoptype consisting of a detection
matrix with 96 photomultiplier units, a segment of a conical mirror and samples
of the radiator materials was built and its performance was evaluated. Results
from the last test beam performed with ion fragments resulting from the
collision of a 158 GeV/c/nucleon primary beam of indium ions (CERN SPS) on a
lead target are reported. The large amount of collected data allowed to test
and characterize different aerogel samples and the sodium fluoride radiator. In
addition, the reflectivity of the mirror was evaluated. The data analysis
confirms the design goals.

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The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys