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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Instrumentation V

HK 18.5: Vortrag

Dienstag, 12. März 2024, 16:45–17:00, HBR 19: C 5a

Investigating Diamond-like carbon (DLC) photocathodes for THGEM-based multi-channel photodetectors — •Anil Berkay Adigüzel, Leonardo Bugia, Berkin Ulukutlu, and Thomas Klemenz — Technische Universität München, Munich, Germany

In physics research, photon detection is vital, but current methods like Photomultiplier tubes and Silicon Photomultipliers are costly. Micro-Pattern-Gas-Detector (MPGD) photon detectors offer a cheaper alternative but struggle with visible spectrum photons due to limited stable photocathode materials. This study introduces a specialized multi-pad THGEM detector for assessing various photocathodes using diverse light sources. With 64 readout channels, it enables accurate background estimation and uniformity assessment of photocathodes. Initial validation involved measuring CsI in the VUV range, confirming expected efficiency. Diamond-Like Carbon (DLC) photocathodes, though less efficient than CsI, show higher resilience to gas-related aging, making them a potential choice when paired with a high-gain amplification structure. This research is funded by the DFG Sachmittel FA 898/5-1

Keywords: Micro Pattern Gaseous Detector MPGD; Gas Electron Multipliers GEM; Thick GEMs THGEM; Gaseous Photon Detectors; Diamond Like Carbon DLC