School of Physics and Astronomy

School Colloquium: Antimatter particles in outer space

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The Alpha Magnetic Spectrometer (AMS) experiment operates since May 2011 on board of the International Space Station to search for primordial anti-matter, to study the light anti-matter components in the Cosmic Rays (CR) and to perform a precision study of the CR composition and energy spectrum.

AMS has been conceived as a multi purpose spectrometer based on the state-of-the-art technology used in high energy physics experiments: a permanent magnet surrounds a 6.4 m2 double-sided silicon micro-strip tracker, trigger and velocity measurements are insured by four planes of scintillators, redundant measurements of particle velocity, energy, charge are performed by a Ring Imaging Cherenkov detectors and a 3D imaging Electromagnetic Calorimeter. A Transition Radiation Detector allows the discrimination of electrons from protons up to the TeV.

More than 70 billion events have been collected by the instrument up to now in the GeV-TeV energy range: thanks to this large statistics and the excellent performances of the detector accurate measurements of matter and anti-matter CR components have been performed by AMS-02 with unprecedented accuracy in an extended energy range.

In this seminar, we will first review the instrument design and its performances in space, then discuss the most recent physics results as well as the data analysis procedures enabling their achievement.

Speaker: Prof Bruna Bertucci, University of Perugia and INFN sez. Perugia

Location: GO Jones Lecture Theatre

Date: February 19th, 2016 at 16:15 (postponed from 5th February)

Refreshments will be served after the event.