V. I. Dobrynin

The Baikal underwater neutrino telescope: Design, performance and first results

Abstract A first deep underwater detector for muons and neutrinos, NT-200 , is currently under construction in Lake Baikal. Part of the detector, NT-36 , with 36 photomultiplier tubes at three strings, has been installed in 1993. This array allowed for the first time a three-dimensional mapping of Cherenkov light deep underwater. Since then, various arrays have been almost continuously taking data. Presently a 96-PMT array is operating. We describe the NT-200 detector design and present results obtained with NT-36 .

A hydroacoustic positioning system for the experimental cluster of the cubic-kilometer-scale neutrino telescope at Lake Baikal

The NT1000 deep-water neutrino telescope with an effective volume of ∼2 km3 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 Lake Baikal underwater telescope NT-36: First months of operation

Abstract Since April 13th 1993, an underwater Cherenkov telescope consisting of 36 photomultipliers arranged along 3 strings is in operation at lake Baikal. We describe the array and present preliminary results of the first five months of operation.

The Baikal-experiment

Abstract We review the historical development and the present status of the Baikal experiment, and sketch the 6-string detector “NT-200”, which is planned to be deployed until 1993 and to study neutrino astrophysics cosmic rays and particle physics.

Results from the Baikal underwater telescope

Since one and a half year, the underwater Cherenkov telescope NT-36 consisting of 36 photomultipliers attached to 3 strings is operated in lake Baikal. The large statistics of collected data allows for comparison with Monte Carlo predictions starting from the level of detector response up to more sophisticated dependences like the angular distribution of muon intensity.