Hamburg 2016 – scientific program
T 82.3: Talk
Wednesday, March 2, 2016, 17:20–17:35, VMP9 SR 29
SPOCK - Single PhOton Calibration stand at Kit — •Michael Karus1, Andreas Ebersoldt2, Simon Ehnle1, Nils Hampe1, Andreas Haungs1, Thomas Huber1, Max Renschler1, Sally-Ann Sandkuhl1, Harald Schieler1, and Andreas Weindl1 for the JEM-EUSO collaboration — 1Institut für Kernphysik (IKP), Karlsruher Institut für Technologie (KIT) — 2Institut für Prozessdatenverarbeitung und Elektronik (IPE), KIT
For JEM-EUSO many photodetectors need to be calibrated pre-flight. Therefore, the Single PhOton Calibration stand at Kit (SPOCK) was built. It is a multi-purpose calibration stand for different photodetectors, e. g. PMTs and SiPMs, that are needed for the detection of fluorescence light from extensive air showers. The capabilities of SPOCK are that different kinds of detectors can be compared with the same systematics. For this, several calibration modes are possible. Detectors can be thoroughly tested in single-photon mode, measuring their photo detection efficiency (PDE) and their gain, with single photons. SPOCK allows for the uniform illumination of bigger detector areas and thus the simultaneous calibration of either several small detectors or of one bigger detector. The dynamic range of detectors can be also tested with SPOCK, via a variable optical output power, ranging from single photons to several 10000 photons per light pulse. Furthermore, different wavelengths can be used with SPOCK. This is especially interesting, as newest SiPMs get more sensitive to the UV-regime. This contribution will show how SPOCK is able to perform single-photon calibration and show examples of the calibration process.