Figure 2From: Mitigating radiation damage of single photon detectors for space applications The main aluminum frame with all detectors groups - 5 APD (right and middle column) and 3 PMT (leftmost column) groups - mounted prior to irradiation. Chilled antifreeze flowing through the copper tubing keeps the frame at 0∘C. A dry, insulating light-tight box (not shown) was placed around the frame.Back to article page