29 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 prototype string for the km3-scale Baikal neutrino telescope
A prototype string for the future km3-scale Baikal neutrino telescope has
been deployed in April, 2008 and is fully integrated into the NT200+ telescope.
All basic string elements - optical modules (with 12"/13" hemispherical
photomultipliers), 200MHz FADC readout and calibration system - have been
redesigned following experience with NT200+. First results of in-situ operation
of this prototype string are presented.Comment: 8 pages, 15 figures; presented at VLVNT08 (Very Large Volume Neutrino
Telescope) Workshop, Toulon, France, April, 2008; to appear in NIM-
The BAIKAL neutrino experiment: From NT200 to NT200+.
The Baikal neutrino telescope NT200 takes data since 1998. In 2005, the
deployment of three additional strings for common operation with NT200 was
finished. We describe the physics program and the design of the new telescope
named NT200+ and present selected physical results obtained with NT200. First
results from NT200+ will be presented at the conference.Comment: 4 pages, 5 figures, Proceedings of 29th International Cosmic Ray
Conference (ICRC) 2005, Pune, Indi
The BAIKAL Neutrino Telescope: From NT200 to NT200+.
We review the status of the Baikal Neutrino Telescope, which has recently been upgraded to the 5 Mton detector NT200+. We present results on searches for upward going atmospheric neutrinos and relativistic magnetic monopoles, obtained from 1998-2002 with the predecessor detector NT200. A search for very high energy neutrinos yields an upper limit on the extraterrestrial diffuse neutrino flux for 20 TeV < E < 50 PeV. We describe the strategy of upgrading NT200 to NT200+ and creating a detector on the Gigaton (km3) scale at lake Baikal. R&D activities on that next stage detector have been started
Search for neutrinos from gamma-ray bursts with the Baikal neutrino telescope NT200
We present the results of our search for neutrino events coinciding in time and direction with gamma-ray bursts (GRBs) with the Baikal underwater neutrino telescope NT200. No events confirming a neutrino accompaniment of GRBs have been detected. Model-independent limits (Greens function) on the neutrino flux from GRBs have been obtained. For the Waxman-Bahcall neutrino spectrum, the limit on the neutrino flux from a GRB has been found to be E 2 ν Φ ν ⩽ 1.1 × 10−6 GeV cm−2 s−1 sr−1