Erlangen 2026 – scientific programme

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ST: Fachverband Strahlen- und Medizinphysik

ST 3: Detectors for Medical Applications

ST 3.4: Talk

Wednesday, March 18, 2026, 14:30–14:45, KH 01.013

Diamond detector for proton therapy based on the readout system of the LHCb Beam Conditions Monitor — Johannes Albrecht, •Nicholas Oldman, Dirk Wiedner, and Lukas Witola — TU Dortmund University, Dortmund, Germany

Due to their exceptional radiation hardness and approximate tissue equivalence, synthetic diamonds make a promising candidate as detector material for the beam analysis in quality assurance at clinical proton therapy centers. At CERN, such diamonds are already in use as detectors at the so-called Beam Conditions Monitor (BCM) at the LHCb experiment.

The BCM features fast readout electronics that process the signal current from the detector diamonds with a time resolution of 40 µs. Based on the operating principle of the BCM, a novel detector system is being developed that aims to implement the use of diamond detectors into the clinical setting. Synthetic polycrystalline diamonds grown by chemical vapor deposition are used for this detector system. They are coated with metallic electrodes to obtain position-sensitive detectors with sub-millimeter spatial resolution. The readout electronics of the BCM are utilized to achieve a fast signal sampling rate.

The progress made in the development of this novel detector system will be presented. Using a simple readout chain, a first test setup is constructed to prepare future measurements of the beam at a proton therapy center.

Keywords: Diamond Detector; Proton Therapy; LHCb