Performance of the Muon $g-2$ calorimeter and readout systems measured with test beam data

Abstract

A single calorimeter station for the Muon $g-2$ experiment at Fermilab includes the following subsystems: a 54-element array of PbF${}_2$ Cherenkov crystals read out by large-area SiPMs, bias and slow-control electronics, a suite of 800 MSPS waveform digitizers, a clock and control distribution network, a gain calibration and monitoring system, and a GPU-based frontend read out through a MIDAS data acquisition environment. The entire system performance was evaluated using 2.5 - 5 GeV electrons at the End Station Test Beam at SLAC. This paper includes a description of the individual subsystems and the results of measurements of the energy response and resolution, energy-scale stability, timing resolution, and spatial uniformity. All measured performances meet or exceed the $g-2$ experimental requirements. Based on the success of the tests, the complete production of the required 24 calorimeter stations has been made and installation into the main experiment is complete. Furthermore, the calorimeter response measurements determined here informed the design of the reconstruction algorithms that are now employed in the running $g-2$ experiment.

arXiv comment16 pages, 27 figures. Updated to match published version

References in corpus (6)

• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Muon (g-2) Technical Design Report
• Studies of an array of PbF2 Cherenkov crystals with large-area SiPM readout
• Design and performance of SiPM-based readout of PbF2 crystals for high-rate, precision timing applications
• Electron beam test of key elements of the laser-based calibration system for the muon $g$ $-$ $2$ experiment
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Cited by in corpus (8)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
• Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 experiment
• Magnetic Field Measurement and Analysis for the Muon g-2 Experiment at Fermilab
• Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab
• Muon $g-2$: A review
• The laser-based gain monitoring system of the calorimeters in the Muon $g-2$ experiment at Fermilab
• Design and performance of an in-vacuum, magnetic field mapping system for the Muon g-2 experiment