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Caption: The detector with which Stanford University phys- icist Dr Blas Cabrera recorded a signal consistent with a magnetic monopole on February 14, 1982. The core of the detector is the tilted ring, which contains 4 turns of superconducting niobium wire. Normally this 5-cm diameter ring lies horizontal, like the two calibration rings above & below it. The assembly is surrounded by a magnetic shield, which reduces the magnetic field within to a millionth of Earth's field. The passage of a monopole through the ring induces a change in current. Magnetic monopoles are important for Grand Unified Theories in physics, for Big Bang theory & for the hidden mass problem in cosmology. (June'84)

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Keywords: astrophysics, cabrera, cosmology, dr blas, electronic, magnetic monopole, monopole, particle physics research, squid

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