An automated QC station for the characterization of the Mu2e Calorimeter Readout Units
November 21, 2022
June 15, 2023
The Mu2e experiment at Fermilab will search for the Standard Model forbidden conversion, within the field of a nucleus, of a negative muon into an electron. The Mu2e detector is composed of a straw tube based tracker for the precise determination of the conversion electron momentum and a calorimeter for providing particle identification and supporting track seeding.
The Mu2e crystal calorimeter is made of two annular disks filled with pure CsI crystals. Each crystal is read by two UV-extended Silicon Photomultipliers which, with two Front End Electronics boards, form a Readout Unit (ROU).
To ensure consistency and reliability of the ROUs, we have designed, assembled and put in operation an automated Quality Control (QC) station to test and calibrate the O(1500) ROUs needed by the Mu2e calorimeter.
In this paper, we present the design details of the QC Station and the results obtained on the measured parameters for a large sample of production ROUs. The achieved reproducibility on the parameter determination is also reported.
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