We analyze sensitivity of the gigaton volume telescope Baikal-GVD for detection of neutrino signal from dark matter annihilations or decays in the Galactic Center. Expected bounds on dark matter ...annihilation cross section and its lifetime are found for several annihilation/decay channels.
The NT1000 deep-water neutrino telescope with an effective volume of ∼2 km
3
is currently being developed at Lake Baikal by the BAIKAL collaboration. The telescope will be composed of functionally ...independent setups—clusters of strings of optical modules based on photomultiplier tubes (with eight strings in each cluster). Since 2011, field tests of the basic elements and systems of the future telescope included in autonomous measuring complexes—prototypes of the NT1000 cluster—have been performed at Lake Baikal. The basic elements and the layout of one of the currently considered versions of the acoustic positioning system for the NT1000 telescope are described, and results of tests of the system prototype included as a component in the experimental cluster of the year 2012 are presented.
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
A project of the NT1000 deep-water neutrino telescope with an effective volume of ∼1 km
3
is currently being developed by the BAIKAL collaboration. The telescope will be located in Lake Baikal in ...close vicinity of the NT200+ detector, which is currently in operation. The telescope will be composed of 12 clusters with 8 similar strings of optical modules in each (each string has two sections of the NT1000 optical modules). The section of the NT1000 optical modules has been developed using higher-efficiency photomultiplier tubes and state-of-the-art electronics. The field tests of the experimental string consisting of two sections with six optical modules in each have been performed. The results of these investigations are used in the project of the NT1000 neutrino telescope and in the hydrological study of Lake Baikal.
We present the first neutrino induced events observed with a deep underwater neutrino telescope. Data from 70 days effective life time of the BAIKAL prototype telescope NT-96 have been analyzed with ...two different methods. With the standard track reconstruction method, 9 clear upward muon candidates have been identified, in good agreement with 8.7 events expected from Monte Carlo calculations for atmospheric neutrinos. The second analysis is tailored to muons coming from close to the opposite zenith. It yields 4 events, compared to 3.5 from Monte Carlo expectations. From this we derive a 90% upper flux limit of 1.1 · 10
−13 cm
−2 sec
−1 for muons in excess of those expected from atmospheric neutrinos with zenith angle > 150 degrees and energy > 10 GeV.
The present status of the Baikal Neutrino Experiment and the present results of a search for upward going atmospheric neutrinos, WIMPs, and magnetic monopoles obtained with the NT-200 detector are ...reviewed. The results of a search for very high-energy neutrinos are presented as well. An upper limit on the {nu}{sub e} + {nu}{sub {mu}} + {nu}{sub {tau}} neutrino diffuse flux of E{sup 2}{phi}(E) < 1.3 x 10{sup -6} cm{sup -2} s{sup -1} sr{sup -1} GeV within a neutrino energy range of 10{sup 4}-10{sup 7} GeV is obtained, assuming an E{sup -2} behavior of the neutrino spectrum and a flavor ratio {nu}{sub e} : {nu}{sub {mu}} : {nu}{sub {tau}} = 1 : 1 : 1. We also describe the moderate upgrade of the NT-200 planned for the next few years and present a possible detector on the Gigaton scale.
We present the results of a search for high-energy extraterrestrial neutrinos with the Baikal underwater Cherenkov detector NT200, based on data taken in 1998–2003. Upper limits on the diffuse fluxes ...of
ν
e
+
ν
μ
+
ν
τ
, predicted by several models of AGN-like neutrino sources, are derived. For an
E
−2 behavior of the neutrino spectrum, our limit is
E
2
Φ
ν
(
E)
<
8.1
×
10
−7
cm
−2
s
−1
sr
−1
GeV over an neutrino energy range 2
×
10
4–5
×
10
7
GeV. The upper limit on the resonant
ν
¯
e
diffuse flux is
Φ
ν
¯
e
<
3.3
×
10
-
20
cm
-
2
s
-
1
sr
-
1
GeV
-
1
.
Several hypotheses concerning variations in the frequency of some elementary events determining the formation and reorganization of mammalian B chromosomes are proposed on the basis of the data on ...their number, morphology, and DNA composition in Korean field mice Apodemus peninsulae (Mammalia, Rodentia) from natural populations of Altai, Buryatia, Irkutsk oblast, and Primorye. The mechanisms and causes responsible for the formation of B chromosomes and differences in their organization in populations of mice from geographically separated regions are discussed.
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