TelePix -- A fast region of interest trigger and timing layer for the EUDET Telescopes

TL;DR

TelePix is an upgrade for EUDET telescopes that significantly improves timing resolution to under 5 ns and enables configurable region of interest triggering, enhancing particle detection capabilities at test beam facilities.

Contribution

The paper introduces TelePix, a novel upgrade providing fast timing and configurable triggering for EUDET telescopes, surpassing existing spatial resolution limitations.

Findings

Achieved a time resolution of 2.4 ns in test beam tests.

Demonstrated over 99% efficiency in particle detection.

Laboratory tests showed a signal-to-noise ratio above 20.

Abstract

Test beam facilities are essential to study the response of novel detectors to particles. At the DESY II Test Beam facility, users can test their detectors with an electron beam with a momentum from 1-6 GeV. To track the beam particles, EUDET-style telescopes are provided in each beam area. They provide excellent spatial resolution, but the time resolution is limited by the rolling shutter architecture to a precision of approximately 230 $\mu$s. Since the demand on particle rates -- and hence track multiplicities -- is increasing timing is becoming more relevant. DESY foresees several upgrades of the telescopes. TelePix is an upgrade project to provide track timestamping with a precision of better than 5 ns and a configurable region of interest to trigger the telescope readout. Small scale prototypes have been characterised in laboratory and test beam measurements. Laboratory tests with an injection corresponding to 2300 electrons show a S/N of above 20. Test beam characterization shows efficiencies of above 99% over a threshold range of more than 100 mV and time resolutions of 2.4 ns at low noise rates.