Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-07-29
Astronomy and Astrophysics
Astrophysics
4 pages, 4 figures, Proceedings of 29th International Cosmic Ray Conference (ICRC) 2005, Pune, India
Scientific paper
The Baikal neutrino telescope NT200, operating since 1998, has been upgraded in spring 2005 to NT200+. This telescope with 3 additional outer strings at 100 m radius from the center encloses a geometric volume of 5 Mtons. We describe the modernized data acquisition and control system, which allows for higher bandwidth, full multiplexing of data and control streams over a single cable to shore, redundant system components and underwater data pre-processing. To calibrate all time offsets between new distant strings and the central telescope on the nsec-scale, a new external laser unit with a powerful N2-Dye laser and a light diffusor, has been developed. This laser is also used to tune reconstruction techniques for pointlike showers with energies from 20 TeV to 10 PeV.
for the BAIKAL Collaboration
Wischnewski Ralf
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