STATUS AND RECENT RESULTS OF THE ATLAS EXPERIMENT A.Cheplakov (on behalf <strong>of</strong> the ATLAS Collaboration) <strong>Joint</strong> <strong>Institute</strong> <strong>for</strong> <strong>Nuclear</strong> <strong>Research</strong>, Dubna The Large Hadron Collider at CERN has resumed its operation in 2012 by showing a stable per<strong>for</strong>mance at 4 TeV per proton beam energy and aiming to provide enough statistics <strong>for</strong> the Higgs boson discovery. ATLAS is one <strong>of</strong> four major experiments accumulating data since the LHC start-up. The status <strong>of</strong> the detector and its per<strong>for</strong>mance are presented in the talk together with the highlights <strong>of</strong> main results, including Higgs boson observation, study <strong>of</strong> the Standard Model processes and heavy ion physics. The ATLAS upgrade plans are presented as well. 36
RECENT RESULTS OF THE STUDY OF ADS WITH 500kg NATURAL URANIUM TARGET ASSEMBLY QUINTA IRRADIATED BY DEUTERONS WITH ENERGIES FROM 1 TO 8 GeV AT <strong>JINR</strong> NUCLOTRON 1 J.Adam, A.Baldin, A.Berlev, W.Furman, N.Gundorin, Zh.Hushvaktov, M.Kadykov, Yu.Kopatch, E.Kostyukhov, I.Kudashkin, A.Makan’kin, I.Mar’in, A.Polansky, A.Rogov, V.Pronskikh, V.Schegolev, A.Solnyshkin, V.Tsupko-Sitnikov, S.Tyutyunnikov, A.Vishnevsky, N.Vladimirova, A.Wojciechowski, L.Zavorka 2 V.Chilap, A.Chinenov, B.Dubinkin, B.Fonarev, M.Galanin, V.Kolesnikov, S.Solodchenkova 3 M.Artyushenko, V.Sotnikov, V.Voronko 4 A.Khilmanovich, B.Martsynkevich 5 S.Kislitsin, T.Kvochkina, S.Zhdanov 6 K.Husak, S.Korneev, A.Potapenko, A.Safronova, I.Zhuk 7 M.Suchopar, O.Svoboda, J.Vrzalova, V.Wagner 8 Ch.Stoyanov, O.Yordanov, P.Zhivkov 9 M.Shuta, E.Strugalska-Gola, S.Kilim, M.Bielevicz 10 W.Westmeier 11 M.Manolopoulou 12 S.R.Hashemi-Nezhad 1 <strong>Joint</strong> <strong>Institute</strong> <strong>for</strong> <strong>Nuclear</strong> <strong>Research</strong>, Dubna, Russia; 2 Center Physical and Technical Projects “Atomenergomash”, Moscow, Russia; 3 NSC Kharkov <strong>Institute</strong> <strong>of</strong> Physics and Technology, Kharkov, Ukraine; 4 Stepanov <strong>Institute</strong> <strong>of</strong> Physics, Minsk, Belarus; 5 <strong>Institute</strong> <strong>of</strong> <strong>Nuclear</strong> Physics NNC RK, Almaty, Kazakhstan; 6 <strong>Joint</strong> <strong>Institute</strong> <strong>for</strong> Power and <strong>Nuclear</strong> <strong>Research</strong>- Sosny near Minsk, Belarus; 7 <strong>Nuclear</strong> Physics <strong>Institute</strong>, Rez near Prague, Czech Republic; 8 <strong>Institute</strong> <strong>of</strong> <strong>Nuclear</strong> <strong>Research</strong> and <strong>Nuclear</strong> Energy, S<strong>of</strong>ia, Bulgaria; 9 National Centre <strong>for</strong> <strong>Nuclear</strong> <strong>Research</strong>, Otwock-Swerk, Poland; 10 Gesellschaft <strong>for</strong> Kernspektrometrie, Ebsdorfergrund-Mölln, Germany; 11 Aristotle Uni-Thessaloniki, Thessaloniki, Greece; 12 School <strong>of</strong> Physics, University <strong>of</strong> Sydney, Australia The study <strong>of</strong> basic properties <strong>of</strong> the ADS presented in the previous Baldin seminar [1] was continued during the 2011-2012. For these experiments, uranium target assembly has been upgraded: the entrance window was created to reduce the albedo <strong>of</strong> the incident beam and a section was added to keep the effective mass <strong>of</strong> uranium to the beam axis. The new target assembly with a mass <strong>of</strong> 500 kg <strong>of</strong> natural uranium metal (diameter ~30cm and length 65cm) was named QUINTA. During the three runs <strong>of</strong> <strong>JINR</strong> NUCLOTRON the target assembly (TA) QUINTA was irradiated by deuterons with energies from 1 to 8 GeV and the total number <strong>of</strong> deuterons on the target <strong>of</strong> (3-5) 10 13 at each energy. There were measured the energy spectra <strong>of</strong> prompt neutrons inside and outside the target assembly and the time spectra <strong>of</strong> fission delayed neutrons (DN) between accelerator bursts. Beside that the spatial distributions <strong>of</strong> fission rates inside TA have been measured with aid <strong>of</strong> solid state track detectors and independently by activation method. The last method was used <strong>for</strong> measurements <strong>of</strong> 239 Pu nuclei production. All these measurements were made with the original TA QUINTA as well as with TA surrounded by a 10 cm thick lead blanket. Total numbers <strong>of</strong> fissions and produced 239 Pu nuclei obtained by integration over QUINTA volume and normalized to one incident deuteron and one GeV were constant within 37