53 research outputs found
Status of the Lake Baikal Experiment
We review the present status of the Baikal Underwater Neutrino Experiment and
report on neutrino events recorded with the detector stages NT-36 and NT-96.Comment: 5 pages, 4 PostScript figures, uses here.sty and mine.sty, submitted
to the Proc. of 5th Int. Workshop on Topics in Astroparticle and Underground
Physics (LNGS INFN, Assergi, September 7-11, 1997
Registration of atmospheric neutrinos with the Baikal neutrino telescope
We present 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 > 10GeV.Comment: 20 pages, 11 figure
The Lake Baikal neutrino experiment
We rewiew the present status of the Baikal Neutrino Project and present the
results of a search for high energy neutrinos with the detector intermediate
stage NT-96.Comment: 3 pages, 2 figures, to appear in the Proceedings of Sixth
International Workshop on Topics in Astroparticle and Underground Physics
(TAUP99), September 6-10, 1999, Pais, Franc
The Baikal Deep Underwater Neutrino Experiment: Results, Status, Future
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.Comment: Talk given at the Int. School on Nuclear Physics, Erice, Sept.199
BDRG and shok instruments for study of GRB prompt emission in michaylo lomonosov space mission
The study of GRB prompt emission (PE) is one of the main goals of the Lomonosov
space mission, which is being prepared at Moscow State University. The GRB
monitor (BDRG) and the wide-field optical cameras (SHOK) are intended for detection of GRB
prompt emission as well as optical counterparts. The BDRG instrument consists of three
identical NaI(Tl)/CsI(Tl) (13.0 × 2.0cm ) phoswich detectors, whose axes determine the
Cartesian coordinate system. This allows to localize any GRB source on the sky by means of
the count rate seen by each detector with an accuracy of ~2 deg. The SHOK
instrument consists of two identical wide-field cameras (WFC) directed in such a way that
the field of view (FOV) of each WFC overlaps by the corresponding BDRG FOV, which produces
a trigger on the WFC in case of a GRB detection. With this setup, the GRB prompt light
curve will be obtained in the visible without any delay with respect to gamma-rays, which
is crucial for a GRB central engine understanding
Theoretical analysis of a Brillouin switch for amplifier decoupling and prepulse suppression in short-pulse high-power laser systems
Space experiments on-board of lomonosov mission to study gamma-ray bursts and UHECRS
The number of experiments on-board Lomonosov spacecraft are preparing now at SINP MSU in
co-operation with other organisations. The main idea of Lomonosov mission is to study
extreme astrophysical phenomena, such as cosmic gamma-ray bursts and ultra-high energy
cosmic rays. These phenomena connect with processes occurred in very distant astrophysical
objects of the Early Universe and give us information about first stages of Universe
evolution. Thus, the Lomonosov mission scientific equipment includes several instruments
for gamma-ray burst observation in optics, ultra-violet, X-rays and gamma-rays and the
wide aperture telescope for ultra-high energy particle study by detection of ionisation
light along its tracks in the atmosphere. The main parameters and a brief description of
these instruments are presented
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