Measurements of optical properties in media enclosing Cherenkov neutrino telescopes are important not only at the moment of the selection of an adequate site, but also for the continuous ...characterization of the medium as a function of time. Over the two last decades, the Baikal collaboration has been measuring the optical properties of the deep water in Lake Baikal (Siberia) where, since April 1998, the neutrino telescope NT-200 is in operation. Measurements have been made with custom devices. The NEMO Collaboration, aiming at the construction of a km
3 Cherenkov neutrino detector in the Mediterranean Sea, has developed an experimental setup for the measurement of oceanographic and optical properties of deep sea water. This setup is based on a commercial transmissometer. During a joint campaign of the two collaborations in March and April 2001, light absorption, scattering and attenuation in water have been measured. The results are compatible with previous ones reported by the Baikal Collaboration and show convincing agreement between the two experimental techniques.
A new array for studying ultra-high energy cosmic rays was inaugurated in 2009 in the Tunka Valley, about 50 km from Lake Baikal. Having an area of 1 km
2
, the new facility allows us to study cosmic ...rays with energies of 10
15
–10
18
eV via the a unified method for registering Cherenkov radiation from extensive air showers (EASes) and is making a substantial contribution to understanding the origin of ultra-high energy cosmic rays. We describe the current state of the experiment, the new methodological approach, our initial results, and the plans for further development of the array.
The Baikal Neutrino Telescope Aynutdinov, V. M.; Balkanov, V. A.; Belolaptikov, I. A. ...
Physics of atomic nuclei,
11/2006, Letnik:
69, Številka:
11
Journal Article
An updated set of (anti)neutrino-nucleon charged and neutral current cross sections at \(3~{\rm GeV} \lesssim E_\nu \lesssim 100~{\rm GeV}\) is presented. These cross sections are of particular ...interest for the detector optimization and data processing and interpretation in the future Megaton-scale experiments like PINGU, ORCA, and Hyper-Kamiokande. Finite masses of charged leptons and target mass corrections in exclusive and deep inelastic \((\bar\nu)\nu N\) interactions are taken into account. A new set of QCD NNLO parton density functions, the ABMP15, is used for calculation of the DIS cross sections. The sensitivity of the cross sections to phenomenological parameters and to extrapolations of the nucleon structure functions to small \(x\) and \(Q^2\) is studied. An agreement within the uncertainties of our calculations with experimental data is demonstrated.
Status of the Baikal neutrino project Aynutdinov, V. M.; Avrorin, A. V.; Balkanov, V. A. ...
Bulletin of the Russian Academy of Sciences. Physics,
05/2009, Letnik:
73, Številka:
5
Journal Article
Recenzirano
Odprti dostop
The status of the Baikal neutrino experiment is briefly reviewed and the results of the search for the natural flux of high-energy neutrinos are reported.
High-frequency noise of Lake Baikal is investigated using a submersible self-contained instrument to determine the noise background for the acoustic detection of superhigh-energy neutrinos. It is ...found that, under stationary and uniform meteorological conditions, the integral noise power in the frequency band 1–50 kHz is virtually independent of depth and is 10–200 mPa or more, depending on the specific conditions. The noise itself contains multiple short pulses of different amplitudes and shapes.
We review the present status of the Baikal Neutrino Experiment. On April 9th, 2005 the 10 Mton scale detector NT200+ was put into operation in Lake Baikal. We describe the configuration and physics ...potential of this detector. Selected results obtained during 1998-2002 with the neutrino telescope NT200 are presented.
Prog.Part.Nucl.Phys.40:391-401,1998 We review the present status of the Baikal Underwater Neutrino Experiment and
present results obtained with the various stages of the stepwise increasing
detector: ...NT-36 (1993-95), NT-72 (1995-96) and NT-96 (1996-97). Results cover
atmospheric muons, first clear neutrino events, search for neutrinos from WIMP
annihilation in the center of the Earth, search for magnetic monopoles, and --
far from astroparticle physics -- limnology.
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