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The Baikal Deep Underwater Neutrino Telescope (BDUNT) conducts neutrino research below the surface of Lake Baikal since 2003.〔 〕 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. 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. NT-72 ran 1995–1996 then was replaced by the four-string NT-96 array.〔Belolaptikov, I. A., Bezrukov, L. B., Borisovets, B. A., Budnev, N. M., Bugaev, E. V., Chensky, A. G., ... & Pokhil, P. G. (1997). The Baikal underwater neutrino telescope: Design, performance, and first results. Astroparticle Physics, 7(3), 263-282. doi:10.1016/S0927-6505(97)00022-4; (scanned version from ) (CERN Preprints )〕 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. 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.〔Wischnewski, R, (The Baikal neutrino experiment: from NT200 to NT200+ ), 27 Sep 2006 (presented at 2nd Workshop on Very Large Volume Neutrino Telescopes (VLVNT2), Catania, Italy, 8.-11. November 2005)〕 There are plans to build 1 cubic km telescope, NT-1000, in Baikal.〔A. V. Avrorin, (An Experimental String of the NT1000 Baikal Neutrino Telescope ) // ISSN 00204412, Instruments and Experimental Techniques, 2011, Vol. 54, No. 5, pp. 649–659. (Pleiades Publishing, Ltd.)〕 The first stage of 3 strings was switched on in April 2013. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Baikal Deep Underwater Neutrino Telescope」の詳細全文を読む スポンサード リンク
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