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Efficiency and uniformity measurements of a light concentrator in combination with a SiPM array
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Efficiency and uniformity measurements of a light concentrator in combination with a SiPM array
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A position sensitive Cherenkov detector was built, consisting of 64 SiPMs with an active area of 3x3 mm^2 and a pixel size of 100x100 \mu m^2. The sensitive area is increased by a light concentrator which consists of 64 pyramid-shaped funnels. These funnels have an entrance area of 7x7 mm^2 and an exit area of 3x3 mm^2, guaranteeing a sufficient position resolution e.g. for the barrel DIRC detector of the PANDA experiment at FAIR. The efficiency and uniformity of the light concentrator in combination with the SiPM array was tested by scanning the array in two dimensions, using a pulsed light beam. Results of these tests and comparison with simulations are given here.
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