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High-precision storage ring for g-2 of the muon and possible applications in particle and heavy ion physics

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Abstract

A new superferric magnetic storage ring with highly homogeneous field at 1.45 T and weak electrostatic focussing is described which has been set up at the Brookhaven National Laboratory (BNL), USA, for a precision measurement of the magnetic anomaly of the muon. The toroidal storage volume has a radius of 7 m and a diameter of 9 cm. Precision magnetic field determination based on pulsed NMR on protons in H2O yields the field to better than 0.1 ppm everywhere within the storage region. Follow on experiments using the setup have been already suggested to search for a finite mass of the muon neutrino and to search for an electric dipole moment of the muon with significantly increased accuracy. The high homogeneity of the field suggests the usage of such devices as a mass spectrometer for heavier particles as well.

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Authors
  1. Klaus P. Jungmann
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Jungmann, K.P. High-precision storage ring for g-2 of the muon and possible applications in particle and heavy ion physics. Hyperfine Interactions 114, 115–121 (1998). https://doi.org/10.1023/A:1012662219480

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