Huyue Zhao

Design Improvement and Bias Voltage Optimization of Glass-Body Microchannel Plate Picosecond Photodetector

Microchannel plate photodetectors, capable of picosecond time resolution and sub-mm spatial resolution, are a perfect candidate for the next generation of photodetectors for precision timing measurements. Argonne National Laboratory is producing low-cost, all-glass body, planar photodetectors with an indium seal. The design and fabrication of 6-cm square photodetectors has been well demonstrated in an ultra-high vacuum system. Recently, a new design was developed to optimize the photodetector bias voltage. This design offers an improved configuration and allows external control of the bias voltage for each internal detector component. Design and measurements of the new independently biased devices are described in this paper. We performed a systematic study on the bias voltage and achieved a gain on the order of

MCP-based photodetectors for cryogenic applications

10^{{\mathbf {7}}}

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

, a time resolution better than 35 ps, and a spatial resolution better than 1 mm.

Development and testing of cost-effective, 6 cm×6 cm MCP-based photodetectors for fast timing applications

The Argonne MCP-based photo detector is an offshoot of the Large Area Pico-second Photo Detector (LAPPD) project, wherein 6 cm x 6 cm sized detectors are made at Argonne National Laboratory. We have successfully built and tested our first detectors for pico-second timing and few mm spatial resolution. We discuss our efforts to customize these detectors to operate in a cryogenic environment. Initial plans aim to operate in liquid argon. We are also exploring ways to mitigate wave length shifting requirements and also developing bare-MCP photodetectors to operate in a gaseous cryogenic environment.

Design and fabrication of prototype 6?6 cm 2 microchannel plate photodetector with bialkali photocathode for fast timing applications

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, 107 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.