The Laser Control System of the g-2 Experiment

The Muon g-2 Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment, a=(g-2)/2 to unprecedented precision: the goal is 0.14 parts per million (ppm). It is expected to start data taking in 2017. To achieve a statistical uncertainty of 0.1 ppm, the total dataset must contain more than 1.8 x 1011 detected positrons with energy greater than 1.8 GeV. The new experiment will require upgrades of detectors, electronics and data acquisition equipment to handle the much higher data rate. In particular, it will require a continuous monitoring and state-of-art calibration of the detectors, whose response may vary on both the millisecond and the several hour timescales. This monitoring will be achieved by sending trains of calibrated laser pulses simultaneously to all detectors. The main characteristics of the Laser Control system are presented.