Thermal noise-limited beam balance as prototype of the Archimedes vacuum weight experiment and B-L dark photon search
Year: 2024
Authors: Allocca A., Avino S., Calloni E., Caprara S., Carpinelli M., Contu A., D’Onofrio L., D’Urso D., De Rosa R., Errico L., Esposito M., Gagliardi G., Grilli M., Mangano V., Marsella M., Naticchioni L., Pasqualetti A., Pepe G., Perciballi M., Puppo P., Rapagnani P., Ricci F., Rosa L., Rovelli C., Rozza D., Ruggi P., Saini NL., Sequino V., Sipala V., Stornaiuolo D., Tafuri F., Trozzo L.
Autors Affiliation: Univ Napoli Federico II, Via Cinthia, I-80126 Naples, Italy; INFN, Sez Napoli, Via Cinthia, I-80126 Naples, Italy; Ctr Nazl Ric Ist Nazl Ottica CNR INO, Naples, Italy; Univ Roma La Sapienza, I-00185 Rome, Italy; INFN Sez Roma 1, I-00185 Rome, Italy; Univ Milano Bicocca, I-20126 Milan, Italy; European Gravitat Observ EGO, Via E Amaldi, I-56021 Cascina, PI, Italy; INFN Lab Nazl Sud, I-95125 Catania, Italy; Univ C agliari, SP Sestu, I-09042 Monserrato, Cagliari, Italy; INFN, Sez Cagliari, SP Sestu, I-09042 Monserrato, Cagliari, Italy; Univ Sassari, I-07100 Sassari, Italy; Ctr Phys Theor, Campus Luminy,Case 907, F-13288 Marseille, France; Aix Marseille Univ, Site Pharo,58 bd Charles Livon, F-13284 Marseille, France; Univ Toulon & Var, Campus La Garde,La Garde,Valette Ave Univ, F-83130 Toulon, France.
Abstract: We describe the behavior of a beam balance used for the measurement of small forces, in macroscopic samples, intens of mHz frequency band. The balance, which works at room temperature, is the prototype of the cryogenic balance of the Archimedes experiment, aimed at measuring the interaction between electromagnetic vacuum fluctuations and the gravitational field. The balance described has a 50-cm aluminum arm and suspends an aluminum sample of 0.2 Kg and a lead counterweight. The read-out is interferometric, and the balance works in closed loop. It is installed in the low seismic noise laboratory of SAR-GRAV(Sardinia-Italy). Thanks to the low sensing and actuation noise and finally thanks to the low environmental noise, the sensitivity in torque tau(n) is about tau(n)approximate to 2 & lowast;10(-12)Nm/root Hz at 10 mHz and reaches a minimum of about tau(n)approximate to 7 & lowast;10(-13)Nm/root Hz at tens of mHz, corresponding to the force sensitivity F(n )of F-n approximate to 3 & lowast;10(-12)N/root Hz. The achievement of this sensitivity, which turns out to be compatible with thermal noise estimation, on the one hand, demonstrates the correctness of the optical and mechanical design and on the other paves the way to the completion of the final balance. Furthermore, since the balance is equipped with weight and counterweight made of different materials, it is sensitive to the interaction with dark B-L photons. A first very short run made to evaluate constraints on B-L dark photon coupling shows encouraging results that will be discussed in view of next future scientificruns
Journal/Review: EUROPEAN PHYSICAL JOURNAL PLUS
Volume: 139 (2) Pages from: 158-1 to: 158-8
More Information: We are extremely grateful to Luca Loddo, Francesco Sedda, Alessandro Porcu, Mauro Porcu, Francesco Cossu, Giuseppe Lai, and Fabrizio Murgia; their generous work made ours possible. We are also in debt with Luca Francescon and Riccardo Machia for their precious support in vacuum equipment.KeyWords: FieldDOI: 10.1140/epjp/s13360-024-04920-xCitations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-09-15References taken from IsiWeb of Knowledge: (subscribers only)