Design
The apparatus is 1.3 m high, has a total mass of 470 kg and a power consumption of 335 W. The instrument is built around a permanent magnet spectrometer with a silicon microstrip tracker that provides rigidity and dE/dx information. At its bottom is a silicon-tungsten imaging calorimeter, a neutron detector and a shower tail scintillator to perform lepton/hadron discrimination. A Time of Flight (ToF), made of three layers of plastic scintillators, is used to measure the beta and charge of the particle. An anticounter system made of scintillators surrounding the apparatus is used to reject false triggers and albedo particles during off-line analysis.
| Particle | Energy Range |
|---|---|
| Antiproton flux | 80 MeV – 190 GeV |
| Positron flux | 50 MeV – 270 GeV |
| Electron flux | up to 400 GeV |
| Proton flux | up to 700 GeV |
| Electron/positron flux | up to 2 TeV |
| Light nuclei (up to Z=6) | up to 200 GeV/n |
| Light isotopes (D, 3He) | up to 1 GeV/n |
| Antinuclei search | sensitivity better than 10−7 antiHe/He |
Read more about this topic: Payload For Antimatter Matter Exploration And Light-nuclei Astrophysics
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