Sub-25 ps timing measurements with 10 × 10 cm 2 PICOSEC Micromegas detectors - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Year : 2022

Sub-25 ps timing measurements with 10 × 10 cm 2 PICOSEC Micromegas detectors

M. Lisowska
F. Brunbauer
M. Gallinaro
D. Janssens
  • Function : Author
M. Kovacic
  • Function : Author
M. Lupberger
I. Maniatis
H. Muller
E. Oliveri
  • Function : Author
L. Ropelewski
  • Function : Author
T. Schneider
  • Function : Author
M. van Stenis
  • Function : Author
A. Utrobicic
  • Function : Author
R. Veenhof
S. White
  • Function : Author

Abstract

The PICOSEC Micromegas detector is a precise timing gaseous detector based on a Cherenkov radiator coupled to a semi-transparent photocathode and a Micromegas amplifying structure. First single-pad prototypes demonstrated a time resolution below  = 25 ps, however, to make the concept appropriate to physics applications, several developments are required. The objective of this work was to achieve an equivalent time resolution for a 10 × 10 cm area PICOSEC Micromegas detector. The prototype was designed, produced and tested in the laboratory and successfully operated with a 80 GeV/c muon beam. Preliminary results for this device equipped with a CsI photocathode demonstrated a time resolution below  = 25 ps for all measured pads. The time resolution was reduced to be below  = 18 ps by decreasing the drift gap to 180 m and using dedicated RF amplifier cards as new electronics. The excellent timing performance of the single-channel proof of concept was not only transferred to the 100-channel prototype, but even improved, making the PICOSEC Micromegas detector more suitable for large-area experiments in need of detectors with high time resolutions.
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Dates and versions

cea-03844611 , version 1 (08-11-2022)

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M. Lisowska, J. Bortfeldt, F. Brunbauer, G. Fanourakis, K.J. Floethner, et al.. Sub-25 ps timing measurements with 10 × 10 cm 2 PICOSEC Micromegas detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, pp.167687. ⟨10.1016/j.nima.2022.167687⟩. ⟨cea-03844611⟩
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