AMS-100: The next generation magnetic spectrometer in space – An international science platform for physics and astrophysics at Lagrange point 2

Abstract The next generation magnetic spectrometer in space, AMS-100, is designed to have a geometrical acceptance of 100 m 2 sr and to be operated for at least ten years at the Sun–Earth Lagrange Point 2. Compared to existing experiments, it will improve the sensitivity for the observation of new phenomena in cosmic rays, and in particular in cosmic antimatter, by at least a factor of 1000. The magnet design is based on high temperature superconductor tapes, which allow the construction of a thin solenoidwith a homogeneous magnetic field of 1 Tesla inside. The inner volume is instrumented with a silicon tracker reaching a maximum detectable rigidity of 100 TV and a calorimetersystem that is 70 radiation lengthsdeep, equivalent to four nuclear interaction lengths, which extends the energy reach for cosmic-raynuclei up to the PeV scale, i.e. beyond the cosmic-rayknee. Covering most of the sky continuously, AMS-100 will detect high-energy gamma-rays in the calorimetersystem and by pair conversion in the thin solenoid, reconstructed with excellent angular resolutionin the silicon tracker.