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Limit on the flux of cosmic-ray magnetic monopoles from operation of an eight-loop superconducting detector

M. E. Huber, B. Cabrera, M. A. Taber, R. D. Gardner

DOI 10.1103/PhysRevLett.64.835 · Physical Review Letters

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Abstract

An eight-loop superconducting magnetic monopole detector has been in continuous operation for 547 days, starting 4 March 1987. Its sensing area is 1.1 m2 for double-coincident events. The data, which contain no candidate events, set an upper limit of 7.2×10−13 cm−2 s−1 sr−1 (90% confidence level) on the flux of monopoles of any mass and at any velocity passing through the Earth’s surface.

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