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Electromagnetic device with superconducting elements for magnetic monopole detection in Apollo lunar samples, describing operation principle, amplifier, sample container and transport system
A velocity- and mass-independent search for moving magnetic monopoles is being performed by continuously monitoring the current in a 20-sq cm area superconducting loop. A single candidate event, consistent with one Dirac unit of magnetic charge, has been detected during five runs totaling 151 days. These data set an upper limit of 6.1 x
The Callan-Witten picture is developed for monopole catalyzed skyrmion decay in order to analyze the corresponding cosmic string scenario. It is discovered that cosmic strings (both ordinary and superconducting) can catalyze proton decay, but that this catalysis only occurs on the scale of the core of the string. In order to do this we have to develop a vortex model for the superconducting string. An argument is also given for the difference in the enhancement factors for monopoles and strings.