Multi-Channel Mppc Gain Stability And Uniformity Study Based On The Temperature Compensation

Silicon photomultiplier (SiPM) as a new type of photoelectric conversion device, compared with the conventional photomultiplier tube (PMT), has some advantages, such as low operating voltage, low power consumption, compactness, magnetic toleration, etc. Multi-pixels photon counter (MPPC) is a kind of SiPM and This paper, by means of off-line analysis, The absolute gain of a 4×4 array MPPC (Hamamatsu, C11206-0404 fb (X)) module is tested; by means of off-line test, single photoelectron spectrum of PMTR7725(Hamamatsu) is tested, and the absolute gain is also acquired. Hence two means of online and offline is compared. Then, the relative gain is analyzed as a function of voltage and temperature, with temperature compensation, relative gain stability has been studied. The differences of relative gains of 4×4 channels are compared, and the bias voltage of each channel is adjusted to realize the gain’s consistency of the 4 ×4 channels. The result show that the consistency and stability can be realized, the multi-channel MPPC can be a good device use in two dimension readout of scintillation detector. In a word, Total in the detector performance test experiment, determine the probe in the form of voltage or current pulse readout is essential to the subsequent electronics circuit configured correctly; for single photon insensitive photoelectric detector, in testing the performance parameters, such as its absolute gain, permission of offline, can choose off-line analysis method; good parameter oscilloscope, Digitizer data acquisition interface card as the data acquisition (DAQ) hardware, collocation such as Labview data acquisition software, can yet be regarded as a kind of accurate and convenient experiment method.