Soudan 1 was a particle detector located in the Soudan Mine in Northern Minnesota, United States, which operated for a year in 1981–82. It was a 30-ton tracking calorimeter whose primary purpose was to search for proton decay.[1] It set a lower limit on the lifetime of the proton of 1.6×1030 years as well as upper limits on the density of magnetic monopoles.[2] It also served as a prototype for the following Soudan 2 and MINOS experiments.
- ^ "The Soudan Nucleon Decay Program", D.S. Ayres, Presented at Workshop on Physics and Astrophysics with a Multikiloton Underground Track-Detector, Rome, Italy, Oct 29-31, 1981
- ^ "Results From The Soudan Prototype Proton Decay Experiment" Ph.D. Thesis, John Eric Bartelt (Minnesota U.), UMI-84-13752, Mar 1984.