Experimental study of high energy electron interactions in a superconducting aluminum alloy resonant bar

Year: 2009

Authors: Barucci M., Bassan M. , Buonomo B., Cavallari G., Coccia E., D’Antonio S., Fafone V., Ligi C., Lolli L.,Marini A. , Mazzitelli G., Modestino G., Pizzella G., Quintieri L., Risegari L., Rocchi A., Ronga F., Valente P., Ventura G., Vinko S.M.

Autors Affiliation: Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy;
Ist Nazl Fis Nucl, Sez Roma 2, I-00133 Rome, Italy;
Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy;
CERN, CH-1211 Geneva, Switzerland;
Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy;
Ist Nazl Fis Nucl, Sez Firenze 1, I-00185 Florence, Italy;
Univ Florence, Dipartimento Fis, I-00185 Florence, Italy

Abstract: Peak amplitude measurements of the fundamental mode of oscillation of a suspended aluminum alloy bar hit by an electron beam show that the amplitude is enhanced by a factor similar to 3.5 when the material is in the superconducting state. This result is consistent with the cosmic ray observations performed by the resonant gravitational wave detector NAUTILUS, made of the same alloy, when operated in the superconducting state. A comparison of the experimental data with the predictions of the model describing the underlying physical process is also presented. (C) 2009 Elsevier B.V. All rights reserved.

Journal/Review: PHYSICS LETTERS A

Volume: 373 (21)      Pages from: 1801  to: 1806

More Information: We thank Messrs. F. Campolungo, M. lannarelli and R. Lenci, which helped with the experiment setup. This work is partially supported by the EU Project WAS (RII3-CT-2004-506222).
KeyWords: Aluminum alloy; Gravitational wave detectors; Radiation acoustics; Superconductivity
DOI: 10.1016/j.physleta.2009.03.043

Citations: 5
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