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In situ measurements of optical parameters in Lake Baikal with the help of a Neutrino telescope |
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| Authors: | Balkanov V Belolaptikov I Bezrukov L Chensky A Budnev N Danilchenko I Dzhilkibaev Z A Domogatsky G Doroshenko A Fialkovsky S Gaponenko O Garus A Gress T Karle A Klabukov A Klimov A Klimushin S Koshechkin A Kulepov V Kuzmichev L Lubsandorzhiev B Lovzov S Mikolajski T Milenin M Mirgazov R Moroz A Moseiko N Nikiforov S Osipova E Pandel D Panfilov A Parfenov Y Pavlov A Petukhov D Pokhil P Pokolev P Popova E Rozanov M Rubzov V Sokalski I Spiering C Streicher O Tarashansky B Thon T Wischnewski R Yashin I |
| Affiliation: | Institute for Nuclear Research, Russian Academy of Sciences, 60-th October Anniversary Prospect 7a, 117312 Moscow, Russia. |
| Abstract: | We present results of an experiment performed in Lake Baikal at a depth of approximately 1 km. The photomultipliers of an underwater neutrino telescope under construction at this site were illuminated by a distant laser. The experiment not only provided a useful cross-check of the time calibration of the detector but also allowed us to determine inherent optical parameters of the water in a way that was complementary to standard methods. In 1997 we measured an absorption length of 22 m and an asymptotic attenuation length of 18 m. The effective scattering length was measured as 480 m. By use of (cos theta) = 0.95 (0.90) for the average scattering angle, this length corresponds to a geometric scattering length of 24 (48) m. |
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