New limit set on cosmic-ray monopole flux by a large-area superconducting magnetic-induction detector

Details New limit set on cosmic-ray monopole flux by a large-area superconducting magnetic-induction detector New limit set on cosmic-ray monopole flux by a large-area superconducting magnetic-induction detector

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..64..839b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 64, Feb. 19, 1990, p. 839-842.

Physics

18

Cosmic Rays, Magnetic Induction, Magnetic Monopoles, Squid (Detectors), Dirac Equation, Proportional Counters, Signal To Noise Ratios, Taylor Series

Scientific paper

A search for cosmic-ray magnetic monopoles has been conducted using a fully coincident superconducting induction detector consisting of six independent high-order gradiometer coils forming the surfaces of a rectangular parallelepiped. The detector had an effective area for isotropic flux averaged over 4 pi sr of 1.0 sq m. Data have been collected from October 1986 to January 1989 with an accumulated live time of 13,410 h. No monopole candidate events were seen, setting a new lower monopole-flux limit for induction detectors of 3.8 x 10 to the -13th/sq cm/s/sr at the 90 percent confidence level.

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