Meissner levitation of a millimeter size neodymium magnet within a superconducting radio frequency cavity

• URL: http://arxiv.org/abs/2011.03144v1
• Date: Fri, 6 Nov 2020 00:20:05 GMT
• Title: Meissner levitation of a millimeter size neodymium magnet within a superconducting radio frequency cavity
• Authors: N. K. Raut, J. Miller, J. Pate, R. Chiao, and J. E. Sharping
• Abstract summary: We report on the magnetic levitation of a millimeter sized neodymium permanent magnet within the interior of a superconducting radio frequency (SRF) cavity. This is the first experimental work on levitating a magnet within an SRF cavity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report on the magnetic levitation of a millimeter sized neodymium permanent magnet within the interior of a superconducting radio frequency (SRF) cavity. To the best of our knowledge, this is the first experimental work on levitating a magnet within an SRF cavity. The cavity is a coaxial quarter wave microwave resonator made from 6061 aluminum, having a resonance frequency of 10GHz and a loaded Q of 1400. The cylindrical magnet (N50) has a height of 1 mm, a diameter of 0.75 mm, a mass of 4 mg, and a remanence of 1.44 T. This produces a peak magnetic field 140 times greater than the critical field of aluminum. Our measurements are consistent over several heating and cooling cycles. Our work provides a path towards a novel optomechanical system.

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