Scientific Results

Picoradiant tiltmeter and direct ground tiltmeasurements at the Sos Enattos site

Year: 2021

Authors: Avino S., Gagliardi G., Annalisa Allocca, Enrico Calloni, Sergio Caprara, Massimo Carpinelli, Domenico D’Urso, Martina De Laurentis,Rosario De Rosa, L. Errico, Marco Grilli, Valentina Mangano, Maria Marsella, Luca Naticchioni, Antonio Pasqualetti,Gianpiero Pepe, Maurizio Perciballi, Luca Pesenti, Paola Puppo,Piero Rapagnani, Fulvio Ricci, LuigiRosa, Carlo Rovelli, Davide Rozza, P. Ruggi, Naurang L. Saini, Valeria Sequino, Valeria Sipala, Daniela Stornaiuolo, Francesco Tafuri

Autors Affiliation: Univ Napoli Federico II, Via Cinthia, I-80126 Naples, Italy; Ist Nazl Fis Nucl, Sez Napoli, Via Cinthia, I-80126 Naples, Italy; Ist Nazl Ott CNR INO, Ctr Nazl Ric, Florence, Italy; Univ Roma Sapienza, I-00185 Rome, Italy; Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy; Univ Sassari, I-07100 Sassari, Italy; Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy; European Gravitat Observ Ego, Via E Amaldi, I-56021 Cascina, PI, Italy; Univ Milano Bicocca, I-20126 Milan, Italy; Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy; Ctr Phys Theor, Campus Luminy Case 907, F-13288 Marseille, France; Aix Marseille Univ, Site Pharo,58 Bd Charles, F-13288 Marseille, France; Univ Toulon & Var, Campus La Garde La Valette Ave Univ, F-83130 Toulon, France

Abstract: We report the tilt sensitivity reached by the ARCHIMEDES tiltmeter in the 2–20 Hz frequency region, where seismic noise is expected to give an important limitation to thesensitivity in the next future Gravitational Waves detection, particularly through Newtoniannoise. The tilt noise level ̃θ(f)is about 10−12rad/√Hz in most of the band, reaching theminimum of ̃θ=7·10−13rad/√Hz around 9 Hz. The tiltmeter is a beam balance with a 0.5 msuspended arm and interferometric optical readout, working in closed loop. The results havebeen obtained by a direct measurement of the ground tilt at the Sos Enattos site (Sardinia,Italy). This sensitivity is a requirement to use the tiltmeter as part of an effective Newtoniannoise reduction system for present Gravitational Waves detectors, and also confirms thatSos Enattos is among the quietest sites in the world, suitable to host the third-generationGravitational Waves detector Einstein Telescope

Journal/Review: EUROPEAN PHYSICAL JOURNAL PLUS

Volume: 136      Pages from: 1069-1  to: 1069-8

KeyWords: tiltmeter, SOS Enattos site, Gravitational Waves detectors
DOI: 10.1140/epjp/s13360-021-01993-w

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