High-sensitivity low-noise photodetector using a large-area silicon photomultiplier

Area of Science:

• Photon detection technology
• Instrumentation and measurement

Background:

• Silicon photomultipliers (SiPMs) offer superior photon detection efficiency over conventional photomultiplier tubes (PMTs) for single photon detection.
• Commercially available large-area SiPMs enable low photon flux applications but present challenges like high dark count rates, numerous readout channels, slow response, and optical crosstalk.

Purpose of the Study:

• To present a compact, large-area photon detection module utilizing SiPM technology.
• To overcome the inherent disadvantages of SiPMs for broader applicability as a PMT upgrade.

Main Methods:

• Incorporation of a simple cooling component to reduce noise, particularly for larger SiPM areas.
• Implementation of a novel optical crosstalk suppression method.
• Development of a dedicated readout circuit to enhance response frequency and minimize readout channels.

Main Results:

• The developed SiPM module demonstrates reduced noise levels through cooling and crosstalk suppression.
• The dedicated readout circuit improved response frequency and channel management.
• Favorable comparisons with conventional PMTs show higher photon detection efficiency and larger-area acceptance.

Conclusions:

• The SiPM-embedded module effectively mitigates SiPM drawbacks, making it a viable upgrade from traditional PMTs.
• The design achieves superior performance in photon detection efficiency and spatial coverage for weak-light applications.