The GINGER project and status of the GINGERino prototype at LNGS

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Ortolan, A.^1 ; Belfi, J.^2 ; Bosi, F.^2 ; Di Virgilio, A.^2 ; Beverini, N.^3 ; Carelli, G.^3 ; Maccioni, E.^3 ; Santagata, R.^3 ; Simonelli, A.^3 ; Beghi, A.^4,5 ; Cuccato, D.^4,5 ; Donazzan, A.^4,5 ; Naletto, G.^4,5

INFN - National Lab of Legnaro, Viale dell'Università 2, Legnaro (PD)

I-35020, Italy^1

INFN - Sez. di Pisa, Largo Pontecorvo, 2, Pisa

I-56127, Italy^2

Department of Physics, University of Pisa, INFN- Sez. di Pisa, Largo Pontecorvo, 2, Pisa

I-56127, Italy^3

Department of Information Engineering (DEI), University of Padova, via Gradenigo 6B, Padova

I-35131, Italy^4

INFN - Sez. di Padova, Via Marzolo, 8, Padova

I-35131, Italy^5

关键词: General Relativity;    Geodetic measurements;    High sensitivity;    Inertial frames;    Laboratory frame;    Lense-thirring effect;    National laboratory;    Underground laboratory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/7/072003/pdf
DOI  :  10.1088/1742-6596/718/7/072003

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

GINGER (Gyroscopes IN GEneral Relativity) is a proposal for measuring in a ground-based laboratory the Lense-Thirring effect, known also as inertial frame dragging, that is predicted by General Relativity, and is induced by the rotation of a massive source. GINGER will consist in an array of at least three square ring lasers, mutually orthogonal, with about 6-10 m side, and located in a deep underground site, possibly the INFN - National Laboratories of Gran Sasso. The tri-axial design will provide a complete estimation of the laboratory frame angular velocity, to be compared with the Earths rotation estimate provided by IERS with respect the fixed stars frame. Large-size ring lasers have already reached a very high sensitivity, allowing for relevant geodetic measurements. The accuracy required for Lense-Thirring effect measurement is higher than 10-14rad/s and therefore Earth angular velocity must be measured within one part in 10-9. A 3.6 m side, square ring laser, called GINGERino, has been recently installed inside the Gran Sasso underground laboratories in order to qualify the site for a future installation of GINGER. We discuss the current status of the experimental work, and in particular of the GINGERino prototype.