2012/01/27 by J. Zálešâk, Zalesak, Jaroslav
Physics and Astronomy · #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Radiation Detection and Scintillator Technologies
paper · pdf · doi:10.48550/arxiv.1201.5762
openalex publication_date 2012/01/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on several versions of the calibration and monitoring system\ndedicated to scintillator tile calorimeters built within the CALICE\ncollaboration and intended for future linear collider experiments. Whereas the\nfirst, a 1 m3 analogue hadron calorimeter prototype, was already built and\ntested in beam, second-technological prototype-is currently being developed.\nBoth prototypes are based on scintillating tiles that are individually read out\nby new photodetectors, silicon photomultipliers (SiPMs). Since the SiPM\nresponse shows a strong dependence on the temperature and bias voltage and the\nSiPM saturates due to the limited number of pixels, it needs to be monitored.\nThe monitoring system has to have sufficient flexibility to perform several\ndifferent tasks. The self-calibration property of the SiPMs can be used for the\ngain monitoring using a low intensity of the LED light. A routine monitoring of\nall SiPMs during test beam operations is achieved with a fixed-intensity light\npulse. The full SiPM response function is cross-checked by varying the light\nintensity from zero to the saturation level. We concentrate especially on the\nlast aspect - the high dynamic range.\n