[en] The project of the first Polish underground laboratory SUNLAB, in the Polkowice-Sieroszowice copper mine, belonging to the KGHM Polska Miedz S.A. holding, is presented. Two stages of the project are foreseen: SUNLAB1 (a small laboratory in the salt layer exhibiting extremely low level of natural radioactivity) and SUNLAB2 (a big laboratory in the anhydrite layer, able to host the next generation liquid argon detector - GLACIER, which is considered within the LAGUNA FP7 project). The results of the natural radioactivity background measurements performed in the Polkowice-Sieroszowice salt cavern are also briefly summarized.

[en] We report an updated result from the ICARUS experiment on the search for ν_μ →ν _e anomalies with the CNGS beam, produced at CERN with an average energy of 20 GeV and traveling 730 km to the Gran Sasso Laboratory. The present analysis is based on a total sample of 1995 events of CNGS neutrino interactions, which corresponds to an almost doubled sample with respect to the previously published result. Four clear ν_e events have been visually identified over the full sample, compared with an expectation of 6.4 ±0.9 events from conventional sources. The result is compatible with the absence of additional anomalous contributions. At 90 % and 99 % confidence levels, the limits to possible oscillated events are 3.7 and 8.3 respectively. The corresponding limit to oscillation probability becomes consequently 3.4 x 10^-3 and 7.6 x 10^-3, respectively. The present result confirms, with an improved sensitivity, the early result already published by the ICARUS Collaboration. (orig.)

[en] We report an early result from the ICARUS experiment on the search for a ν_μ → ν_e signal due to the LSND anomaly. The search was performed with the ICARUS T600 detector located at the Gran Sasso Laboratory, receiving CNGS neutrinos from CERN at an average energy of about 20 GeV, after a flight path of ∝730 km. The LSND anomaly would manifest as an excess of ν_e events, characterized by a fast energy oscillation averaging approximately to sin ²(1.27Δ m²_newL/E_ν)∼ 1/2 with probability P_νμ→νe = 1/2 sin²(2θ_new). The present analysis is based on 1091 neutrino events, which are about 50 % of the ICARUS data collected in 2010-2011. Two clear ν_e events have been found, compared with the expectation of 3.7 ± 0.6 events from conventional sources. Within the range of our observations, this result is compatible with the absence of a LSND anomaly. At 90 % and 99 % confidence levels the limits of 3.4 and 7.3 events corresponding to oscillation probabilities left angle P_νμ→νe right angle ≤ 5.4 x 10^-3 and left angle P_νμ→νe right angle ≤ 1.1 x 10^-2 are set respectively. The result strongly limits the window of open options for the LSND anomaly to a narrow region around (Δm², sin²(2θ))_new = (0.5 eV², 0.005), where there is an overall agreement (90 % CL) between the present ICARUS limit, the published limits of KARMEN and the published positive signals of LSND and MiniBooNE Collaborations. (orig.)