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The temperature stability of 0.005°C for the concrete floor in the CERN Transfer Tunnel #1 hosting the Precision Laser Inclinometer

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Abstract

To reach a sensitivity level of ~10–9 rad for the Precision Laser Inclinometer (PLI) for the registration of the Earth surface angular oscillation in the low frequency band of [10–6 Hz; 1 Hz] the temperature stability of the CERN Transfer Tunnel #1 has been investigated. The daily temperature variation was 0.082°C for the air and 0.005°C for the concrete floor. The last result opened the possibility to observe the Earth surface inclination caused by Moon and Sun if the PLI is thermally stabilized by the massive monolithic concrete floor of the tunnel.

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Correspondence to M. Lyablin.

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Azaryan, N., Budagov, J., Lyablin, M. et al. The temperature stability of 0.005°C for the concrete floor in the CERN Transfer Tunnel #1 hosting the Precision Laser Inclinometer. Phys. Part. Nuclei Lett. 14, 913–919 (2017). https://doi.org/10.1134/S1547477117060206

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  • DOI: https://doi.org/10.1134/S1547477117060206

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