Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector

Details Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..44..636h&link_type=abstract

Physical Review D (Particles and Fields), Volume 44, Issue 3, 1 August 1991, pp.636-660

Physics

2

Scientific paper

A superconducting detector for cosmic-ray magnetic monopoles originally designed with a cross section of 1.5 m2 (averaged over 4π solid angle) for double-coincident events was active from 5 May 1987 to 5 August 1988. The detector consists of eight independent inductive gradiometers located on the surface of an octagonal prism. The conductor is niobium-titanium foil and the current sensors are rf SQUID's. The signal-to-noise ratio for a single Dirac charge is greater than 50 in a 0.05-Hz bandwidth, and low-noise data was obtained over 547 days of continuous cryogenic operation. Of this time, we obtained ~50% live time. Open circuits in portions of two gradiometers and occasional coupling of disturbances in adjacent gradiometers reduce the active sensing area to 1.1 m2. A closed-cycle helium liquefier eliminates helium transfers and increases the stability of the data. Anticoincidence instrumentation includes strain gauges, a flux-gate magnetometer, an ultrasonic motion detector, and a wideband rms rf voltmeter. The exposure to date represents a limit on the flux of cosmic-ray magnetic monopoles of 7.2×10-13 cm-2 s-1 sr-1 at a 90% confidence level, eliminating most of the phase space for monopole plasma oscillation theories.

Affiliated with

Also associated with

No associations

Rating

Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for a flux of cosmic-ray magnetic monopoles with an eight-channel superconducting detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1307186