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ST: Fachverband Strahlen- und Medizinphysik

ST 3: Detectors for Medical Applications

ST 3.2: Vortrag

Mittwoch, 18. März 2026, 14:00–14:15, KH 01.013

Evaluation of the KLauS Chip for Measurement of Scintillation and Cherenkov Light — Atharva Bahekar, Yazeed Balasmeh, Ivor Fleck, •Mara Fries, Lars Maczey, and Devanshi Mehta — Experimentelle Teilchenphysik, Center for Particle Physics Siegen, Universität Siegen

Detecting and imaging ionising radiation is essential in fields ranging from fundamental physics to medical diagnostics, where precise reconstruction of high-energy γ-ray interactions remains a key challenge. Conventional Compton Cameras show promising results but are typically optimised for γ-rays below 1 MeV, limiting their applicability in high-energy imaging scenarios. The Cherenkov Compton Camera concept uses a novel approach by introducing a thicker scattering layer in order to use Cherenkov light to track the Compton electron. This enables a determination of the direction of the recoil electron, thereby extending the energy range of Compton Cameras beyond 1 MeV.

In this talk, I will present results from the ongoing development of the Cherenkov Compton Camera, focusing on the KLauS ASIC designed by the University of Heidelberg and its possible use in both the scattering and absorption layers. The KLauS ASIC has been tested with large scintillation signals from GAGG and LGSO crystals, as well as fast Cherenkov signals in UV-transparent PMMA. Characterization using UV-sensitive Broadcom SiPMs allows us to assess the suitability and operating performance of the KLauS readout for a high-energy Cherenkov Compton Camera.

Keywords: Medical Imaging; Read-out ASICs for SiPMs; Compton Camera; Scintillators; Cherenkov Light