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Vibrational excitation induced by electron beam and cosmic rays in normal and superconductive aluminum bars

Abstract:
We report new measurements of the acoustic excitation of an Al5056 superconductive bar when hit by an electron beam, in a previously unexplored temperature range, down to 0.35 K. These data, analyzed together with previous results of the RAP experiment obtained for T > 0.54 K, show a vibrational response enhanced by a factor 4.9 with respect to that measured in the normal state. This enhancement explains the anomalous large signals due to cosmic rays previously detected in the NAUTILUS gravitational wave detector.

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Publication date:
2011-05-24
URN:
uuid:e02e8ea9-1d5e-4e37-8d63-397f0bcc5ca5
Source identifiers:
151738
Local pid:
pubs:151738

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