| DATE: |
2013-04-05 16:00 - 17:00 |
| PLACE: |
Tsukuba Campus, Buidking No.4 Room345 |
| TITLE: |
Physics Seminar/Recent results from AMS02 |
| CONTACT: |
Takasumi Maruyama |
| SPEAKER: |
Sylvie Rosier-Lees (LAPP-Annecy,IN2P3-CNRS) |
| LANGUAGE: |
English |
| ABSTRACT: |
The Alpha Magnetic Spectrometer (AMS-02) is a general purpose high energy particle detector which was successfully deployed on the International Space Station (ISS) on May 19, 2011 to conduct a long duration mission of fundamental physics research in space. In 18 months of operation, AMS-02 has collected more than 20 billions of particle events. The main scientific goals of the experiment are the searches for antimatter and dark matter, the high precision measurement of charged cosmic ray spectra and fluxes and the study of gamma rays, in the GeV to TeV energy range. A summary of the AMS02 performance in space, based on the data collected during the initial 18 months of operation, will be reviewed. Details will be given on the Electromagnetic Calorimeter (ECAL) which is required to measure e+, e- and gamma spectra and to discriminate electromagnetic showers from hadronic cascades. The AMS02 sensitivity on the positron fraction measurement (i.e positron/positron+electron, based on a sample of 6.8 million electron and positron events) will be presented over the 0.5 to 350 GeV energy range. |
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