Paper

The laser-based gain monitoring system of the calorimeters in the Muon \\(g-2\\) experiment at Fermilab

Iacovacci, M, Santi, L, Ferrari, C, Marignetti, F, P Di Meo, Driutti, A, Corradi, G, Cantatore, G, Hampai, D, Miozzi, S, Karuza, M, Fioretti, A, Incagli, M, Anastasi, A, Dabagov, S, Nath, A, Sweigart, D A, Girotti, P, Hertzog, D W, Basti, A, Lusiani, A, Smith, M, R Di Stefano, Hempstead, J B, Gioiosa, A, Kaspar, J, Pauletta, G, Sorbara, M, S Di Falco, Bottalico, E, Venanzoni, G, Bedeschi, F, Fienberg, A T, Gabbanini, C, Mastroianni, S, Khaw, K S, Raha, N, Donati, S, Boiano, A, Chapelain, A T, Gibbons, L K, G Di Sciascio, Cauz, D, Piacentino, G M

2019

Overview

The Muon \\(g-2\\) experiment, E989, is currently taking data at Fermilab with the aim of reducing the experimental error on the muon anomaly by a factor of four and possibly clarifying the current discrepancy with the theoretical prediction. A central component of this four-fold improvement in precision is the laser calibration system of the calorimeters, which has to monitor the gain variations of the photo-sensors with a 0.04\\% precision on the short-term (\\(\\sim 1\\,\\)ms). This is about one order of magnitude better than what has ever been achieved for the calibration of a particle physics calorimeter. The system is designed to monitor also long-term gain variations, mostly due to temperature effects, with a precision below the per mille level. This article reviews the design, the implementation and the performance of the Muon \\(g-2\\) laser calibration system, showing how the experimental requirements have been met.

• Publisher: Cornell University Library, arXiv.org
• Subject: Calibration / Lasers / Muons / Particle physics / Quality standards / Temperature effects