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T: Fachverband Teilchenphysik

T 10: Gaseous detectors

T 10.8: Vortrag

Montag, 15. März 2021, 17:45–18:00, Tj

A simple method to improve the position resolution — •Lucian Scharenberg^1,2, Jona Bortfeldt³, Florian Brunbauer¹, Klaus Desch², Francisco Garcia⁴, Marek Hracek^1,5, Djunes Janssens^1,6, Marta Lisowska^1,7, Michael Lupberger², Hans Muller¹, Hugo Natal da Luz⁵, Eraldo Oliveri¹, Dorothea Pfeiffer^8,1, Heikki Pulkkinen^1,9, Leszek Ropelewski¹, Jerome Samarati^8,1, Miranda van Stenis¹, Antonija Utrobicic¹, and Rob Veenhof^1,10 — ¹CERN — ²University of Bonn — ³Ludwig Maximilian University of Munich — ⁴Helsinki Institute of Physics — ⁵Czech Technical University in Prague — ⁶Free University of Brussels — ⁷Wroclaw University of Science and Technology — ⁸ESS — ⁹VR Group — ¹⁰Bursa Uludag University

During the development of position-sensitive particle detectors, significant efforts are spent on finding segmented readout electrodes that suit the experimental requirements. The centre-of-gravity method is a popular choice to then reconstruct the position of the incident radiation. However, the discretisation by the electrode causes an information loss, leading to inaccuracies in the position reconstruction.

We present the observed inaccuracies and a simple method that reduces them. Using imaging techniques, we show that the reduction is not the consequence of a smoothing effect. For these studies, we made use of a hardware feature from our readout electronics (VMM3a ASIC and RD51's Scalable Readout System) that allows us to gain more charge information. Afterwards, we present results with MIPs that confirm the improved position resolution.