Speaker
Dr
Dmitrii ILIN
(Petersburg Nuclear Physics Institute - NRC "Kurchatov Institute", Gatchina, Russia)
Description
The muon detector of LHCb is one of the largest instrument of this kind worldwide, and one of the most irradiated. Currently we run at the relatively low instantaneous luminosity of 4×$10^{32}$ cm$^{-2}$s$^{-1}$, nevertheless the most irradiated MWPCs having the rates on the level ~1 MHz per FEB channel were ~99% efficient. Direct measurements shown that the hits in muon chambers dominated by signals from low energy background (LEB), presumably coming from reactions with thermal neutrons in the materials of chambers. Fraction of LEB hits exceeds 90% in inner regions of the MUON detector and it was one of the factor recovering an efficiency in four-gaps MWPCs strongly affected by deadtime of FE-electronics.
Looking forward on future upgrade of LHCb aiming the run at luminosity of 2×$10^{34}$ cm$^{-2}$s$^{-1}$ where expected rate will reach ~1 MHz/cm$^2$ , a possibility of application of the multi gaps pad MWPCs assembled with FE-electronics able to reject LEB is presented.
In addition, a test setup already constructed for GIF++ facility at CERN especially for the study of detectors and FE-electronics operating at very high rates is shown.
Primary author
Dr
Oleg Maev
(European Organization for Nuclear Research (CERN), Geneva, Switzerland)
Co-authors
Dr
Dmitrii ILIN
(Petersburg Nuclear Physics Institute - NRC "Kurchatov Institute", Gatchina, Russia)
Mr
Nikolai Bondar
(Petersburg Nuclear Physics Institute - NRC "Kurchatov Institute", Gatchina, Russia)
