Physics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ncimc...9..159b&link_type=abstract
(Symposium on Underground Physics, 1st, Saint Vincent, Italy, Apr. 25-28, 1985) Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol.
Physics
Calorimeters, Cosmic Ray Showers, Nucleons, Particle Tracks, Radiation Counters, Radioactive Decay, Underground Structures, Elementary Particle Interactions, Flash Lamps, Geiger Counters, Laboratories, Leptons, Mesons, Muons, Neutrinos
Scientific paper
The 114-module 912-ton fine-grain tracking-calorimeter facility installed beneath 1600 m of rock in the Frejus tunnel is described and illustrated with diagrams and photographs, and preliminary results are reported. Each module comprises a 6 x 6-m vertical Geiger plane and eight flash chambers (934,000 5 x 5-mm polypropylene flash tubes filled with Ne-He and triggered by 40,000 15 x 15-mm-section Al Geiger tubes filled with Ar-ethanol) separated by 3-mm iron plates; a charged particle can be located to within 2mm by the detector. From reduction of data on 30 events recorded since June 1984 and considered to be within the detector it is inferred that none can be interpreted as nucleon decay into charged leptons or mesons.
Bareyre P.
Barloutaud R.
Behr L.
Berger Ch.
Bland Roger
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