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T: Fachverband Teilchenphysik

T 64: Halbleiterdetektoren: Forschung und Entwicklung 2

T 64.1: Talk

Tuesday, February 28, 2012, 16:45–17:00, ZHG 001

Optical test stand for SiPM characterisation — •Benjamin Glauß, Thomas Hebbeker, Carsten Heidemann, and Markus Merschmeyer — III. Physikalisches Institut A, RWTH Aachen University

Silicon photomultipliers (SiPMs) are versatile and hence interesting semiconductor based detectors for detection of single photons. This makes SiPMs ideal detectors for particle and astroparticle physics experiments. The SiPM characteristics include absolute and relative photon detection efficiency (PDE) and furthermore noise phenomena such as after pulsing and optical crosstalk as well as thermal noise. We have developed a test device, capable of measuring the above in a compact setup featuring devices for pulsing single wavelength LEDs and for providing constant white light that are designed especially for these testing purposes. Readout is carried out via QDC and FADC hardware and all testing mentioned above is integrated in one single setup, running fully automated. One main focus is on the resolution of the optical monochromator for studying the SiPM properties as a function of wavelength. The optical test stand for precision measurements on SiPM characteristics as well as results of these measurements are presented.