ISSN - 00189456, IEEE Transactions on Instrumentation and Measurement, 1999, vol. 48, p. 182-185
Status of the BNL muon (g-2) experiment
The union (g-2) experiment at Brookhaven completed a first run in June and July 1997. The main components of the experiment, which include the superconducting inflector, the superferric storage ring, the electrostatic quadrupoles and the lead-scintillating fiber electron calorimeters, have been commissioned satisfactorily. Our first measurement of the ratio R of the spin precession frequency of the positive muon relative to that of a free proton, R =(3.707 219±0.000 048)×10-3, is in good agreement with the previous CERN measurements for μ+ and μ-, and has approximately the same uncertainty as each of these measurements. In spring 1998 a muon kicker was installed and successfully tested in the storage ring magnet and a significant improvement in the knowledge of the muon g-factor is expected from upcoming runs in August 1998 and January 1999. © 1999 IEEE.