Dortmund 2021 – scientific programme

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ST: Fachverband Strahlen- und Medizinphysik

ST 5: Medical Imaging

ST 5.4: Talk

Tuesday, March 16, 2021, 16:45–17:00, STa

First measurements with an LGAD equipped prototype of a Time-of-Flight system — •Valerie Hohm, Kevin Kröninger, Sebastian Pape, and Jens Weingarten — TU Dortmund, Experimentelle Physik IV

To enhance the resolution of the treatment planning in proton therapy, proton computed tomography (pCT) is one approach. These systems usually consist of a tracking detector and a residual energy detector. The latter could be realised by a Time-of-Flight system, whose performance essentially depends on the time resolution of the used detectors.

As timing detectors Low Gain Avalanche Detectors (LGADs) are considered. They are n-in-p silicon sensors with an additional gain layer to multiply signal charges developed for the ATLAS experiment and CMS experiment upgrade. The internal gain layer supplies a typical amplification in the range of 10 to 30 for unirradiated LGADs and enables a time resolution up to 30 ps.

This talk focuses on the usage of LGADs in a Time-of-Flight system. First measurements with a prototype of such a system will be presented as well as an outlook of the feasibility of the system for the energy measurement in a proton tomography system.