New Chambers for M23R12
for the Muon Upgrade
Alessandro Cardini
INFN Cagliari
Requirements: from TDR
Numbers from Giacomo’s extrapolation of current rates + new
shielding effect, still to be verified with upgrade MC
CERN, 21/2/2014
A. Cardini / INFN Cagliari
Some comments
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M23R1 rates after LS1 will be as high as what we experience now in M1R1
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We will also experience important rates in M23R2
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Detector aging should hopefully not be a major problem – although we
would like to perform an R&D on this
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Rate is (usually) not the main issue: the current reaodut (tuned to have the
maximum possible efficiency in a low occupancy environment) is not
optimized for the upgrade conditions  large occupancies, mainly due to
low energy photon conversion in gas gaps, create a large number of ghost
hits that will affect muon identification performance
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Efforts should go in the following directions:
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Performance studies with extrapolations/toy MC/full upgrade MC
Optimized readout geometry
Optimized readout logic (for example, AND+OR instead of current OR+OR)
Ageing tests
New FE electronics
CERN, 21/2/2014
A. Cardini / INFN Cagliari
From the PID TDR
CERN, 21/2/2014
A. Cardini / INFN Cagliari
From Martellotti’s slides 3/2/2014
CERN, 21/2/2014
A. Cardini / INFN Cagliari
More from Giuseppe
CERN, 21/2/2014
A. Cardini / INFN Cagliari
Some possible solutions (Martellotti)
CERN, 21/2/2014
A. Cardini / INFN Cagliari
More from Martellotti
CERN, 21/2/2014
A. Cardini / INFN Cagliari
Outlook
• Slides on upgraded muon system performances
available here: https://indico.cern.ch/event/299158/
(muon meeting of 03FEB14)
• Next Monday during LHCb Week we will continue
these discussions in Monday’s muon meeting
https://indico.cern.ch/event/298016/
CERN, 21/2/2014
A. Cardini / INFN Cagliari