Timing performance of a multi-pad PICOSEC-Micromegas detector prototype
Abstract
The multi-pad PICOSEC-Micromegas is an improved detector prototype with a segmented anode, consisting of 19 hexagonal pads. Detailed studies are performed with data collected in a muon beam over four representative pads. We demonstrate that such a device, scalable to a larger area, provides excellent time resolution and detection efficiency. As expected from earlier single-cell device studies, we measure a time resolution of approximately 25 picoseconds for charged particles hitting near the anode pad centres, and up to 30 picoseconds at the pad edges. Here, we study in detail the effect of drift gap thickness non-uniformity on the timing performance and evaluate impact position based corrections to obtain a uniform timing response over the full detector coverage.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- March 2021
- DOI:
- 10.1016/j.nima.2021.165076
- arXiv:
- arXiv:2012.00545
- Bibcode:
- 2021NIMPA.99365076A
- Keywords:
-
- Gaseous detectors;
- Micromegas;
- Multi-pad;
- Time resolution;
- Physics - Instrumentation and Detectors;
- High Energy Physics - Experiment
- E-Print:
- 29 pages, 20 figures