# The monitoring system and the data acquisition of the Laser Calibration system in the Muon g-2 experiment.

Nath A. per la Collaborazione g-2

Comunicazione
I - Fisica nucleare e subnucleare
Aula 32B-1 - Venerdì 21 h 10:15 - 12:00
The Muon g-2 Experiment at Fermilab will measure the muon anomalous magnetic moment with unprecedented precision (0.14 ppm), reducing the experimental uncertainty by a factor of 4 with respect to the previous measurements at BNL (E821). The new experiment benefits from upgraded detectors, storage ring, electronics and data acquisition system. To achieve a systematic uncertainty of 0.07 ppm the response of each channel of calorimeter stations must be calibrated and monitored at a level of $10^{-4}$ in the time window of muon fill. A calibration system based on laser source and a light distribution has been designed and implemented at Fermilab by the INFN group. The light pulses are read by specific photo-detectors, whose signals are digitized by a custom electronics module designed to match the experiment requirements. The Monitoring electronics, organized in a specific crate, performs full data acquisition of the calibration signals, starting from pre-amplification, then digitization of the signals and finally transfer of the information. The data acquisition system is based on an event-driven data collection built around two custom boards to achieve a high data transfer rate and an event-building capability. In this work we present the monitoring and the acquisition system including first performances with real data.