Detector upgrade R&D of the CMS Hadronic Endcap and Forward calorimeters
Nuclear Science Symposium Conference Record（2009）
摘要
The CMS Hadronic Endcap (HE) and Hadronic Forward (HF) calorimeters cover the pseudorapidity range of from 1.4 to 5 on both sides of the CMS detector, contributing to superior jet and missing transverse energy resolutions. Here we discuss possible upgrade scenarios for both calorimeters. Recent studies revealed abnormally high amplitude signals due to punch through charged particles, mostly muons, producing Cherenkov photons at the HF calorimeter PMT window. Our studies show that these events can be eliminated either by using the timing properties, or replacing the HF PMTs with new generation four anode PMTs. As the integrated luminosity of the LHC increases, the scintillator tiles used in the CMS Hadronic Endcap calorimeter will lose their efficiency. This report outlines two possible radiation hard upgrade scenarios based on replacing the HE scintillators with quartz plates.
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关键词
cherenkov counters,particle calorimetry,position sensitive particle detectors,solid scintillation detectors,cms detector,cherenkov photons,he photomultiplier tubes,he scintillators,hf pmts,abnormally high amplitude signals,anode pmts,charged particles,compact muon solenoid hadronic endcap calorimeters,compact muon solenoid hadronic forward calorimeter,quartz plates,radiation hard upgrade scenarios,scintillator tiles,superior jet resolution,timing properties,transverse energy resolutions,radiation hardness,helium,hafnium,mesons,anodes,physics,large hadron collider
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