Speaker
Dr
Ryuichi Nishiyama
(Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern)
Description
The measurement of the cosmic-ray muon flux can be used to infer the density structure of overburden material. The Eiger-mu project proposes muon radiography to map the shape of the bedrock beneath Alpine glaciers. The first test has been performed at Jungfrau region. We installed emulsion film detectors in the Jungfrau railway tunnel. The detectors stayed 47 days and recorded tracks of muons which passed through the glacier and the bedrock. The high-resolution and automatic microscopes at the University of Bern enabled muon absorption rate analysis and yielded a three-dimensional boundary shape between the dense granite bedrock and the ice part in the very uppermost part of the Aletsch glacier.
Authors
Dr
Ryuichi Nishiyama
(Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern)
Mr
Samuel Käser
(Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern)
Akitaka Ariga
(Universitaet Bern (CH))
Tomoko Ariga
(University of Bern)
Mr
Alessandro Lechmann
(Institute for Geological Sciences, University of Bern)
Mr
David Mair
(Institute for Geological Sciences, University of Bern)
Paola Scampoli
(Universitaet Bern (CH))
Dr
Mykhailo Vladymyrov
(Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern)
Prof.
Fritz Schlunegger
(Institute for Geological Sciences, University of Bern)
Antonio Ereditato
(Universitaet Bern (CH))
