Thermoelectrical cooler enhances MPCC devices
Hamamatsu Photonics has expanded and enhanced its range of semiconductor detectors, featuring photon counting capability, with the introduction of the brand new S12576-050 and S12577-050 multi-pixel photon counter devices (MPPC). The new devices utilise a Geiger-mode avalanche photodiode structure for ultra-low-level light detection, and a two-stage thermoelectric cooler, operating down to -25oC.
The inclusion of a TE cooler reduces the MPPC dark count to 1/20 of that seen at room temperature, equating to 5cps typically for the S12576-050 and 50cps typically for the S12577-050. The MPPC is easily connected to an external circuit for simple operation and is operated from a low voltage power supply (approximately 65 Volts). Hamamatsu also offers a temperature controller which maintains a constant temperature within the thermoelectrically cooled package.
The S12576-050 and S12577-050 are 1x1mm and 3x3mm devices respectively, with 400 and 3,600 pixels. Each pixel contains a quenching resistor so that simultaneous photon events can be counted separately and, with a high degree of accuracy. The devices feature typical high gain values of 1.25E6, comparable to that achievable from a conventional photomultiplier tube.
The S12576-050 and S12577-050 are ideal for a variety of applications, including positron emission tomography, high-energy physics, DNA sequencing, fluorescence measurement, nuclear medicine, point of care systems, drug discovery, medical diagnostic equipment and environmental analysis.
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