Characterization of the upgraded Frontend Electronics of the Shwarzschild-Couder Telescope based on the SMART ASIC
2023 9th International Workshop on Advances in Sensors and Interfaces (IWASI)(2023)
摘要
We present the characterization of the new Frontend Electronics (FEE) developed for the Schwarzschild-Couder Telescope (SCT) camera of the CTA experiment. The new FEE is based on a new Application-Specific Integrated Circuit (ASIC) intended to read-out arrays of Silicon Photomultipliers (SiPMs) for low-level light detection down to the single photoelectron, called SMART (SiPM Multichannel ASIC for high Resolution Cherenkov Telescopes). The analog channel is composed of a high speed path with programmable gain and pole-zero filter designed for photon-counting. An external fast digitizer can be used for the photon-counting analysis. A slow path allows the measurement of the mean SiPM current, sampled by an internal 10-bit ADC. We present the characterization results obtained when coupling the SMART to a 16 SiPM matrix produced by Fondazione Bruno Kessler (FBK). Results in terms of charge spectrum, signal-to-noise ratio and dynamic range will be presented. The SMART ASIC was then coupled to the SCT readout electronics based on the TARGET ASICs, able to digitize waveforms at a frequency of 1GS/s and to generate trigger signals. In this work, we further present the preliminary characterization obtained on the full FEE chain.
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关键词
SiPM, Front-end electronics, ASIC, CTA, Cherenkov Telescope
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