Recent progress in the development of 6 cm × 6 cm micro-channel plate based photodetectors at Argonne National Laboratory

Argonne National Laboratory (ANL) is currently developing 6 cm × 6 cm, all-glass body, sealed photodetectors based on Microchannel Plates (MCPs) functionalized by Atomic Layer Deposition (ALD). A Small Single Tube Processing System (SmSTPS) was constructed for fabricating the photodetectors. A number of first version devices were successfully produced and have shown satisfactory performances. Recently, a new version of these devices based on an Independently Biased Design (IBD) was developed. This design allows for individually controlling the voltage of each stack component to optimize the performance. So far, six IBD devices have been produced and characterized. We have measured 14% Quantum efficiency, 10
⁷
gain and 35 ps overall time resolution including the laser jitter. In this paper, we present the status of the tube production, the photodetector design and the testing results.