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Soudan 2 was a particle detector located in the Soudan Mine in Northern Minnesota, United States, that operated from 1989 to 2001. It was a 960-ton iron tracking calorimeter whose primary purpose was to search for proton decay, although its data was also used to investigate the properties of neutrinos. It found no evidence of proton decay, but it did help confirm Super-Kamiokande's atmospheric neutrino result, supporting the theory of neutrino oscillation.[1]

The Soudan Mine is also home to the MINOS and CDMS detectors.
History

Soudan 2 was the successor to the Soudan 1, a similar 30 ton detector also intended to search for proton decay.[2]

The excavation for Soudan 2 was done in 1984–1985. Installation was started in 1986 and was completed in 1993. The experiment was run from April 1989 to June 2001, beginning with a partial detector of 275 tons.[3] It was disassembled in 2005 to make room for further low background physics experiments, including MINOS.
External links

The University of Minnesota's Soudan 2 page
Argyrios Stassinakis's thesis: A Study of the Atmospheric Neutrino Flavour Content Using the Soudan 2 Detector

References

"Current Aspects of Neutrino Physics", Caldwell, David O. (Ed.), 2001, ISBN 3-540-41002-3
http://ccdb4fs.kek.jp/cgi-bin/img_index?8203219 "The Soudan Nucleon Decay Program", D.S. Ayres. ANL-HEP-CP-82-03, Presented at Workshop on Physics and Astrophysics with a Multikiloton Underground Track-Detector, Rome, Italy, 29-31 Oct 1981.

http://www.slac.stanford.edu/spires/find/experiments/www2?expt=SOUDAN "Results From The Soudan Prototype Proton Decay Experiment", John Eric Bartelt (University of Minnesota). UMI-84-13752, Mar 1984. Ph. D. Thesis.

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Neutrino detectors, experiments, and facilities
Discoveries

Cowan–Reines ( νe ) Lederman–Schwartz–Steinberger ( νμ) DONUT ( ντ) Neutrino oscillation SN 1987 neutrino burst

Operating
(divided by primary neutrino source)
Astronomical

ANITA ANTARES ASD BDUNT Borexino BUST HALO IceCube LVD NEVOD SAGE Super-Kamiokande SNEWS

Reactor

Daya Bay Double Chooz KamLAND RENO STEREO

Accelerator

ANNIE ICARUS (Fermilab) MicroBooNE MINERνA MiniBooNE NA61/SHINE NOνA NuMI T2K

0νββ

AMoRE COBRA CUORE EXO GERDA KamLAND-Zen MAJORANA NEXT PandaX SNO+ XMASS

Other

KATRIN WITCH

Construction

ARA ARIANNA Baikal-GVD BEST DUNE Hyper-Kamiokande JUNO KM3NeT SuperNEMO FASERν

Retired

AMANDA CDHS Chooz CNGS Cuoricino DONUT ERPM GALLEX Gargamelle GNO Heidelberg-Moscow Homestake ICARUS IGEX IMB K2K Kamiokande KARMEN KGF LSND MACRO MINOS MINOS+ NARC NEMO OPERA RICE SciBooNE SNO Soudan 2 Utah

Proposed

CUPID GRAND INO LAGUNA LEGEND LENA Neutrino Factory nEXO Nucifer SBND UNO JEM-EUSO WATCHMAN

Cancelled

DUMAND Project Long Baseline Neutrino Experiment NEMO Project NESTOR Project SOX BOREX

See also

BNO (Baksan or Baxan Neutrino Observatory) Kamioka Observatory LNGS SNOLAB List of neutrino experiments

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Proton decay experiments
Operating

Super-Kamiokande

Retired

Frejus Homestake HPW IMB Kamiokande KGF NUSEX Soudan 1 Soudan 2

Proposed

ANNIE Hyper-Kamiokande LAGUNA

See also

B − L Grand Unified Theory Georgi–Glashow model

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