1

Longevity and Expected Performance of the Existing Muon System at the LHC

Experiments

C. Bedoya, P. Dupieux, P. Iengo, G. Lanfranchi

ECFA Muon talk2

2

Present muon detectors and performance• Short intro on the 4 systems with main performance

results after Run1• Consolidation during LS1 (ATLAS, CMS)

~4 slides

~2 slides

3

Present muon detectors and performance

4

Challenge with HL-LHC operation• Common aspects on muon

detector limitations with HL• Occupancy• Rate capability• Dead time• Fake trigger rate• Ageing

~3-4 slides

LHCb

5

Expected performance and upgrade plans• What are the expected performances (lifetime) of the systems and how the

experiments will cope with the higher luminosity scenario (Phase1 and Phase2) • Specific issues for each system• Specific tests to be performed to establish if the present detectors fulfil the

requirements of HL-LHC and spot weakness/marginalities • Upgrade plans (stressing the impact on the system performance, w/o describing

the technologies )

~4-5 slides

Status of the presentation• ALICE: received a summary slide. No muon upgrade foreseen, but more material on the

future performance of the current detectors is needed• ATLAS: all material ~in hand. Phase1 OK, to be decided what to include for Phase2.• CMS: received detailed slides, all material in hand. Some iteration needed in the

following weeks• LHCb: No material received so far. No upgrade foreseen for the muon system, material

for the present detector (and the future performance) needed anyhow.