SIF 2016 – The calibration system of the Muon g-2 experiment
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SIF 2016 – The calibration system of the Muon g-2 experiment
E. Rossi (INFN LNF)
September 26, 2016 - September 30, 2016
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The muon anomaly (g−2)/2 has been measured to 0.54 parts per million by the E821 experiment at Brookhaven Lab, and at present there is a 3 to 4-standard deviation difference between the SM and experimental values. A new Muon (g−2) experiment, E989, is being prepared at Fermilab that will improve the experimental error by a factor of four to clarify this difference. A central component to reach this fourfold improvement in accuracy is the high-precision laser calibration system which should monitor the gain fluctuations of the Calorimeter Photodetectors at 0.04% accuracy. I will review this system, focusing on the technical challenges, solutions, and achievements obtained so far.