e/Soudan 1

Information
has gloss	eng: Soudan 1 was a particle detector located in the Soudan Mine in Northern Minnesota, United States. It was a 30 ton iron tracking calorimeter whose primary purpose was to search for proton decay. 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. It also served as a prototype for the following Soudan 2 and MINOS experiments.
lexicalization	eng: Soudan 1
instance of	c/Particle experiments

Media
media:img	Soudan 1 proton decay experiment.jpg