Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 16: Instrumentation VI
HK 16.1: Talk
Monday, March 28, 2022, 16:00–16:15, HK-H5
Beam measurements with the RD51 beam telescope using the VMM3a and SRS — •Karl Jonathan Flöthner1,2, Lucian Scharenberg1,2, Daniel Petri Sorvisto4, Eraldo Oliveri1, Francisco Fuentes3, and Bernhard Ketzer2 — 1CERN — 2Univ. of Bonn (DE) — 3Helsinki Institute of Physics — 4Univ. of Aalto (FI)
RD51 is an international research and development collaboration at CERN with focus on advanced gas-avalanche detector technologies and associated electronic-readout systems.
For testbeam campaigns the RD51 collaboration provides a GEM-based beam telescope for detector studies.
It consists of several triple-GEM detectors with an active area of 10x10 cm2 and additional scintillators to generate a trigger signal for the start of events.
During the last year the telescope was equipped with the new VMM3a ASIC coupled to the Scalable Readout System (SRS).
In this configuration the system can provide a MHz counting rate-capability, spatial resolutions in the order of 50 µ m (COMPASS like triple-GEM detector) and time resolutions in the 10-ns regime (VMM capable of few ns).
The new setup was tested in the laboratory and during two testbeam campaigns (July/October 2021). The system contains five GEM-detectors and a total of 42 VMMs (2688 channels).
During the last beam campaign, the telescope has been used to investigate different fine-pitch GEM foils to understand the impact on spatial resolution with MIPs.
The talk will discuss some challenges of the system and present first results of the last testbeam data, focussing on the performance of the fine-pitch GEM.
Supported by BMBF.