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“School of Particles And Accelerator”

Paper   IPM / Particles And Accelerator / 15804
   School of Particles and Accelerator
  Title: Fast timing measurement for CMS RPC Phase-II upgrade
  Author(s):
1 . Vahid Amoozegar
2 . Behzad Boghrati
3 . Hanieh Ghasemy
4 . Sahar Malmir
5 . Mojtaba Mohammadi Najafabadi
6 . CMS RPC Collaboration
  Status: Published
  Journal: JINST
  No.: 09, C09001
  Vol.: 13
  Year: 2018
  Supported by: IPM
  Abstract:
With the increase of the LHC luminosity foreseen in the coming years, many detectors currently used in the different LHC experiments will be dramatically impacted and some need to be replaced or upgraded. The new ones should be capable to provide time information to reduce the data ambiguity due to the expected high pileup. We propose to equip CMS high - η - muon chambers with pairs of single gap RPC detectors read out by long pickup strips PCB. The precise time measurement (0<15 ps) of the signal induced by particles crossing the detector on both ends of each strip will give an accurate measurement of the position of the incoming particle along the strip. The absolute time measurement, determined by RPC signal (around 1.5 ns) will also reduce the data ambiguity due to the highly expected pileup and help to identify Heavy Stable Charged Particles (HSCP). The development of a specific electronic chain (analog front-end ASIC, time-to-digital converter stage and printed circuit board design) and the corresponding first results on prototype chambers are presented.

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