Speaker
Dr
Mitsuhiro Kimura
(Universitaet Bern (CH))
Description
The goal of the AEgIS experiment (CERN AD-6) is a test of the Weak Equivalence Principle for antimatter. We will measure the earth's gravitational acceleration g on antihydrogen atoms that have been launched in a horizontal vacuum tube. A position sensitive detector will detect their annihilation at the end of the tube. The goal is to determine g with a 1% accuracy. The University of Bern proposes to use nuclear emulsions with submicron resolution for the detector, which will improve the resolution by an order of magnitude compared to the original AEgIS proposal. The detector has to operate in vacuum, a condition that has not been investigated so far with emulsions, and which is the subject of this R&D work. In 2012 we tested emulsion films at 8x10^-6 mbar and room temperature with 5 MeV antiprotons from CERN's antiproton decelerator. The annihilation vertices could be observed directly on the emulsion surface using the microscope facility available in Bern for the analysis of the OPERA data. We could successfully reconstruct the annihilation vertices with a resolution of 1-2 microns on the impact parameter. Results of the tests will be presented, and plans for future developments will be discussed.
| quote your primary experiment | AEgIS |
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Primary author
Dr
Mitsuhiro Kimura
(Universitaet Bern (CH))
Co-authors
Akitaka Ariga
(Laboratorium fuer Hochenergiephysik-Universitaet Bern)
Prof.
Antonio Ereditato
(Universitaet Bern (CH))
Carlo Canali
(Universitaet Zuerich (CH))
Christian Regenfus
(Universitaet Zuerich (CH))
Ciro Pistillo
(Universitaet Bern (CH))
Claude Amsler
(Universitaet Bern (CH))
Igor Kreslo
(Universitaet Bern (CH))
Mr
Jacky ROCHET
(University of Zurich)
Dr
James Storey
(Universitaet Zuerich (CH))
Jiro Kawada
(Universitaet Bern (CH))
Paola Scampoli
(Università di Napoli Federico II)
Saverio Braccini
(Universitaet Bern (CH))
Tomoko Ariga
(University of Bern)
