66 research outputs found
Baikal-GVD
We present the status of the Gigaton Volume Detector in Lake Baikal (Baikal-GVD) designed for the detection of high energy neutrinos of astrophysical origin. The telescope consists of functionally independent clusters, sub-arrays of optical modules (OMs), which are connected to shore by individual electro-optical cables. During 2015 the GVD demonstration cluster, comprising 192 OMs, has been successfully operated in Lake Baikal. In 2016 this array was upgraded to baseline configuration of GVD cluster with 288 OMs arranged on eight vertical strings. Thus the instrumented water volume has been increased up to about 5.9 Mtons. The array was commissioned in early April 2016 and takes data since then. We describe the configuration and design of the 2016 array. Preliminary results obtained with data recorded in 2015 are also discussed
The Tunka-133 EAS Cherenkov light array: status of 2011
A new EAS Cherenkov light array, Tunka-133, with ~1 km^2 geometrical area has
been installed at the Tunka Valley (50 km from Lake Baikal) in 2009. The array
permits a detailed study of cosmic ray energy spectrum and mass composition in
the energy range 10^16 - 10^18 eV with a uniform method. We describe the array
construction, DAQ and methods of the array calibration.The method of energy
reconstruction and absolute calibration of measurements are discussed. The
analysis of spatial and time structure of EAS Cherenkov light allows to
estimate the depth of the EAS maximum X_max. The results on the all particles
energy spectrum and the mean depth of the EAS maximum X_max vs. primary energy
derived from the data of two winter seasons (2009 -- 2011), are presented.
Preliminary results of joint operation of the Cherenkov array with antennas for
detection of EAS radio signals are shown. Plans for future upgrades --
deployment of remote clusters, radioantennas and a scintillator detector
network and a prototype of the HiSCORE gamma-telescope -- are discussed.Comment: 8 pages, Proceedings of the RICAP 2011 Conference, submitted to NIM
Acoustic Search for High Energy Neutrinos in Lake Baikal: Status and Perspectives
The status and perspectives of the feasibility study to detect high energy cosmic neutrinos acoustically in Lake Baikal is presented. The concept of on acoustic array as a part of the Baikal Gigaton Volume Neutrino Telescope GVD based on results of simulation and background measurements is described
The optical detection unit for Baikal-GVD neutrino telescope
The first stage of the GVD-cluster composed of five strings was deployed in April 2014. Each string consists of two sections with 12 optical modules per section. A section is the basic detection unit of the Baikal neutrino telescope. We will describe the section design, review its basic elements – optical modules, FADC readout units, slow control and calibration systems, and present selected results for section in-situ tests in Lake Baikal
Luminescence of water in Lake Baikal observed with the Baikal-GVD neutrino telescope
We present data on the luminescence of the Baikal water medium collected with the Baikal-GVD neutrino telescope. This three-dimensional array of light sensors allows the observation of time and spatial variations of the ambient light field. In 2016, we observed a maximum of luminescence activity between July and October
Baikal-GVD: first results and prospects
Next generation cubic kilometer scale neutrino telescope Baikal-GVD is currently under construction in Lake Baikal. The detector is specially designed for search for high energies neutrinos whose sources are not yet reliably identified. Since April 2018 the telescope has been successfully operated in complex of three functionally independent clusters i.e. sub-arrays of optical modules (OMs) where now are hosted 864 OMs on 24 vertical strings. Each cluster is connected to shore by individual electro-optical cables. The effective volume of the detector for neutrino initiated cascades of relativistic particles with energy above 100 TeV has been increased up to about 0.15 km3. Preliminary results obtained with data recorded in 2016 and 2017 are discussed
The optical module of Baikal-GVD
The Baikal-GVD neutrino telescope in Lake Baikal is intended for studying astrophysical neutrino fluxes by recording the Cherenkov radiation of the secondary muons and showers generated in neutrino interactions. The first stage of Baikal-GVD will be equipped with about 2300 optical modules. We describe the design of the optical module, the front-end electronics and the laboratory characterization and calibration before deployment
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