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Zero Magnetic Field From a Superconducting Balloon

JUN 01, 1968

DOI: 10.1063/1.3035008

William Fairbank, William Hamilton and their collaborators at Stanford University are building an apparatus to produce a truly zero magnetic field. Since magnetic flux trapped in the hole in a superconducting cylinder is quantized, the Fairbank group expects to produce zero field inside a hollow superconducting shield by cooling the shield through its transition temperature in a field so small that the total flux passing through the shield is less than half a flux unit (less than 2×10−7gausscm2). With the apparatus they plan to look for an electric dipole moment in He3 to see if time‐reversal invariance is violated.

This Content Appeared In
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Volume 21, Number 6

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