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Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 29: Neutrino physics 3

T 29.8: Talk

Tuesday, March 5, 2024, 17:45–18:00, Geb. 20.30: 2.058

Investigating Large Area Picosecond Photodetectors for future ν-detectors — •Benedict Kaiser, Tanjina Anannya, Lukas Bieger, Marc Breisch, Jessica Eck, Tobias Heinz, Florian Kirsch, Tobias Lachenmaier, Dhanushka Bandara, and Tobias Sterr — Eberhard Karls Universität Tübingen, Physikalisches Institut

Large Area Picosecond Photodetectors (LAPPDs) are novel Microchannel Plate (MCP) based photodetectors. With a gain ranging from 106 to 107 and a gain uniformity of 90% across a large active area of 373 cm2 they are capable of detecting single photons. They show a position resolution of 3 mm and an unparalleled time resolution better than 70 ps.

This exceptional performance is achieved by a flat, evacuated glass case accommodating a K2NaSb photocathode, a chevron arrangement of two MCPs for electron multiplication and 28 silver anode strips dedicated to signal detection. Presently, our focus lies in validating LAPPD performance characteristics using a dedicated test stand.

This talk presents the operational principles and distinctive features of LAPPDs and provides an overview of our measurement findings so far.

Keywords: LAPPD; MCP; Photodetector; Picosecond

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