Cosmic Rays Observed by the Resonant Gravitational Wave Detector NAUTILUS

Astone, P.; Bassan, M.; Bonifazi, P.; Carelli, P.; Coccia, E.; Fafone, V.; D’Antonio, S.; Frasca, S.; Marini, A.; Mauceli, Evan; Mazzitelli, G.; Minenkov, Y.; Modena, I.; Modestino, G.; Moleti, Arturo; Pallottino, G. V.; Papa, M. A.; Pizzella, G.; Ronga, F.; Terenzi, R.; Visco, M.; Votano, L.

doi:10.1103/physrevlett.84.14

Cited by 47 publications

(16 citation statements)

References 13 publications

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“…The first detection of cosmic ray signals in a gw antenna took place in 1998, with the Nautilus detector operating at a temperature T = 0.14 K [30], i.e. below the superconducting (s) transition critical temperature T c 0.9 K. During this run, an unexpectedly large number of events with very large amplitude were detected.…”

Section: The Thermo-acoustic Modelmentioning

confidence: 99%

Dark matter searches using gravitational wave bar detectors: Quark nuggets and newtorites

Bassan

Coccia

D’Antonio

et al. 2016

Astroparticle Physics

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Many experiments have searched for supersymmetric WIMP dark matter, with null results. This may suggest to look for more exotic possibilities, for example compact ultra-dense quark nuggets, widely discussed in literature with several different names. Nuclearites are an example of candidate compact objects with atomic size cross section. After a short discussion on nuclearites, the result of a nuclearite search with the gravitational wave bar detectors Nautilus and Explorer is reported. The geometrical acceptance of the bar detectors is 19.5 m(2) sr, that is smaller than that of other detectors used for similar searches. However, the detection mechanism is completely different and is more straightforward than in other detectors. The experimental limits we obtain are of interest because, for nuclearites of mass less than 10(-5) g, we find a flux smaller than that one predicted considering nuclearites as dark matter candidates. Particles with gravitational only interactions (newtorites) are another example. In this case the sensitivity is quite poor and a short discussion is reported on possible improvements. (C) 2016 Elsevier B.V. All rights reserved

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Section: The Thermo-acoustic Modelmentioning

confidence: 99%

Dark matter searches using gravitational wave bar detectors: Quark nuggets and newtorites

Bassan

Coccia

D’Antonio

et al. 2016

Astroparticle Physics

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“…(ii) cosmic ray showers are known to produce short bursts of excitation in the antennas. The events must not be in coincidence with a shower, as recorded by detectors installed above and below both antennas [16,17]. These two selections veto a very small fraction of the events, usually less than 0.1%.…”

Section: A Data Selectionmentioning

confidence: 99%

“…In the period considered, however, the refrigerator was not operational, in order to maximize the detector duty cycle. Both detectors are equipped with cosmic ray telescopes, to veto excitations due to large showers [15][16][17]. The two telescopes rely on different technologies (scintillators for Explorer, streamer tubes for Nautilus) but both provide a monitor of comparable effectiveness and a continuous check of the antenna sensitivity [18,19].…”

Section: Introductionmentioning

confidence: 99%

Analysis of 3 years of data from the gravitational wave detectors EXPLORER and NAUTILUS

et al. 2013

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We performed a search for short gravitational wave bursts using about 3 years of data of the resonant bar detectors Nautilus and Explorer. Two types of analysis were performed: a search for coincidences with a low background of accidentals (0.1 over the entire period), and the calculation of upper limits on the rate of gravitational wave bursts. Here we give a detailed account of the methodology and we report the results: a null search for coincident events and an upper limit that improves over all previous limits from resonant antennas, and is competitive, in the range h rss $ 10 À19 , with limits from interferometric detectors. Some new methodological features are introduced that have proven successful in the upper limits evaluation.

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“…Later on, the cryogenic resonant gw detector NAUTILUS [2] was equipped with a streamer tube extensive air shower detector [3] and the interaction of cosmic ray with the antenna has been studied in detail. This apparatus allowed the first detection of cosmic ray signals in a gw antenna, that took place in 1998, when NAUTILUS was operating at a temperature T = 0.14 K [4], i.e. below the superconducting (s) transition critical temperature T c 0.9 K. During this run many events of very large amplitude were detected.…”

Section: Introductionmentioning

confidence: 99%

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

Bassan

Buonomo

Cavallari

et al. 2011

Nuclear Instruments and Methods in Physics Research Section A:

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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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Cosmic Rays Observed by the Resonant Gravitational Wave Detector NAUTILUS

Abstract: The passage of cosmic rays has been observed to excite mechanical vibrations in the resonant gravitational wave detector NAUTILUS operating at temperature of 100 mK. A very significant correlation (more than 10 standard deviations) is found.

Cited by 47 publications

References 13 publications

Dark matter searches using gravitational wave bar detectors: Quark nuggets and newtorites

Dark matter searches using gravitational wave bar detectors: Quark nuggets and newtorites

Analysis of 3 years of data from the gravitational wave detectors EXPLORER and NAUTILUS

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

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