The SiPM single pixel test board is a circuit board that integrates a single SiPM chip and the basic electronic components required to read SiPM signals. It is mainly divided into two categories based on functional differences:
The first type of SiPM single point test board only includes SiPM chips and connectors that lead out the positive and negative poles of SiPM chips. It cannot directly output SiPM signals through external SiPM bias. A signal interface board containing SiPM power supply filtering circuit and SiPM signal impedance matching circuit needs to be connected to the backend to output SiPM signals normally. After receiving this type of single point test board, users need to design their own backend signal interface board;
The second type of SiPM single point test board includes SiPM chip, SiPM power supply filtering circuit, SiPM signal impedance matching circuit, signal amplification and shaping circuit based on operational amplifier (opamp). The amplified SiPM signal can be output through external SiPM bias voltage and the required positive and negative voltages of the operational amplifier. This signal can be directly connected to a digitizer or multi-channel system for digital acquisition of SiPM signals.
The SiPM single point test board can be used to evaluate key performance indicators of different types of SiPM chips,such as dark noise count rate, single photon spectrum, gain, and PDE variation with SiPM bias voltage, to help researchers quickly verify the feasibility of SiPM detector based design schemes in the early stages of scientific research projects;It can also be coupled with different types of scintillators (gas scintillators, liquid scintillators, solid-state inorganic scintillators, solid-state organic scintillators, etc.) to form an integrated detector for detecting different types of radiation (X-ray,gamma, alpha/beta, etc.).
