SiPM module for the ACME III electron EDM search

Abstract

This report shows the design and the performance of a large area Silicon Photomultiplier (SiPM) module developed detection of fluorescent light emitted from a 10 cm scale volume. The module was optimized for the planned ACME III electron electric dipole moment (eEDM) search, which will be a powerful probe for the existence of physics beyond the Standard Model of particle physics. The ACME experiment searched for the eEDM with the world's highest sensitivity using cold ThO polar molecules (ACME II). In ACME III, SiPMs will be used for detection of fluorescent photons (the fundamental signal of the experiment) instead of PMTs, which were used in the previous measurement. We have developed an optimized SiPM module, based on a 16-channel SiPM array. Key operational parameters are characterized, including gain and noise. The SiPM dark count rate, background light sensitivity, and optical crosstalk are found to all be well suppressed and more than sufficient for the ACME III application.

arXiv comment10 pages, 6 figures, proceedings for NDIP20

References in corpus (5)

• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Combined 4-component and relativistic pseudopotential study of ThO for the electron electric dipole moment search
• Suppression of the optical crosstalk in a multi-channel silicon photomultiplier array
• Electrostatic focusing of cold and heavy molecules for the ACME electron EDM search
• High-sensitivity low-noise photodetector using large-area silicon photomultiplier

Cited by in corpus (4)

• Relativistic Exact Two-Component Coupled-Cluster Study of Molecular Sensitivity Factors for Nuclear Schiff Moments
• Zee-model predictions for lepton flavor violation
• Full Three-Loop Electroweak Multiplet Contributions to the Electron Electric Dipole Moment
• Baryogenesis in $SU(2{)}_L$ multiplet models