Baikal Deep Underwater Neutrino Telescope

The Baikal Deep Underwater Neutrino Telescope (BDUNT) (Russian: Байкальский подводный нейтринный телескоп) is a neutrino detector conducting research below the surface of Lake Baikal (Russia) since 2003.^[1] The detector was completed in 1998 and was upgraded in 2005. Further expansion to 1000 PMTs is planned. BDUNT has studied neutrinos coming through the earth with results on atmospheric muon flux. BDUNT picks up a lot of atmospheric neutrinos created by solar winds interacting with the atmosphere — as opposed to cosmic neutrinos which can give clues to cosmic events and are therefore of greater interest to physicists.

Detector History

The original NT-200 design was deployed in stages 3.6 km from shore at a depth of 1.1 km (location: 51°46′17″N 104°23′52″E / 51.77139°N 104.39778°ECoordinates: 51°46′17″N 104°23′52″E / 51.77139°N 104.39778°E).

The first part, NT-36 with 36 optical modules (OMs) at 3 short strings, was put into operation and took data up to March 1995.^[2] NT-72 ran 1995–1996 then was replaced by the four-string NT-96 array.^[3] Over its 700 days of operation, 320,000,000 muon events were collected with NT-36, NT-72, and NT-96. Beginning April 1997, NT-144, a six-string array took data. The full NT-200 array with 192 modules was completed April 1998.^[4] In 2004-2005 it was updated to NT-200+ with three additional strings around NT-200 at distance of 100 meters, each with 12 modules.^[5][6]

There are plans to build 1 cubic km telescope, NT-1000, in Baikal.^[7] The first stage of 3 strings was switched on in April 2013.^[8]

Results

BDUNT has used its neutrino detector to study astrophysical phenomenon. Searches for relic dark matter in the sun^[9] and high energy muons^[10] and neutrinos^[11] were published.

See also

• Baksan Neutrino Observatory

External links

• Home Page

References

1. "Icy life working with Russia's underwater 'cosmic eye'". BBC News. 24 September 2010. Retrieved 2011-02-18.
2. Belolaptikov, I. A. (1995). "Results from the Baikal Underwater Telescope" (PDF). Nucl. Phys. B Proc. Suppl. 43: 241–244. Bibcode:1995NuPhS..43..241B. doi:10.1016/0920-5632(95)00481-N.
3. Belolaptikov, I. A.; et al. (1997). "The Baikal underwater neutrino telescope: Design, performance, and first results". Astroparticle Physics. 7 (3): 263. Bibcode:1997APh.....7..263B. doi:10.1016/S0927-6505(97)00022-4.
4. "Baikal Lake Neutrino Telescope". Baikalweb. 6 January 2005. Retrieved 2008-07-30.
5. Aynutdinov, V.; et al. (2005). "The Baikal neutrino experiment: From NT200 to NT200+". Proceedings of the 29th International Cosmic Ray Conference. 5: 75. Bibcode:2005ICRC....5...75A.
6. Wischnewski, R.; et al. (Baikal Collaboration) (2005). "The Baikal Neutrino Telescope — Results and Plans". International Journal of Modern Physics A. 20 (29): 6932. arXiv:astro-ph/0507698. Bibcode:2005IJMPA..20.6932W. doi:10.1142/S0217751X0503051X.
7. Avrorin, A. V.; et al. (2011). "An Experimental String of the NT1000 Baikal Neutrino Telescope" (PDF). Instruments and Experimental Techniques. 54 (5): 649–659. doi:10.1134/S0020441211040178.
8. Avrorin, A. V.; et al. (2014). "Data acquisition system of the NT1000 Baikal neutrino telescope". Instruments and Experimental Techniques. 57 (3): 262. doi:10.1134/S002044121403004X.
9. Avrorin, A.D.; et al. (2015). "Search for neutrino emission from relic dark matter in the sun with the Baikal NT200 detector". Astroparticle Physics. 62: 12. arXiv:1405.3551. Bibcode:2015APh....62...12A. doi:10.1016/j.astropartphys.2014.07.006.
10. Wischnewski, R.; et al. (2005). "The Baikal Neutrino Telescope — Results and Plans". International Journal of Modern Physics A. 20 (29): 6932. Bibcode:2005IJMPA..20.6932W. doi:10.1142/S0217751X0503051X.
11. Aynutdinov, V.; et al. (BAIKAL Collaboration) (2006). "Search for a Diffuse Flux of High-Energy Extraterrestrial Neutrinos with the NT200 Neutrino Telescope". Astropart. Phys. 25 (2): 140. arXiv:astro-ph/0508675. Bibcode:2006APh....25..140A. doi:10.1016/j.astropartphys.2005.12.005.