Commissioning of upgrade forward hadron calorimeters of CMS

Abstract

The CMS experiment at the Large Hadron Collider (LHC) at CERN is upgrading the photo-detection and readout system of the forward hadron calorimeter (HF). During Long Shutdown 1, all of the original PMTs were replaced with multi-anode, thin window photomultipliers. At the same time, the back-end readout system was upgraded to micro-TCA readout. Here we report on the experience with commissioning and calibrating the HF front-end as well as the online operational challenges of the micro-TCA system. Presented at IEEE-NSS-MIC-2016 IEEE Nuclear Science Symposium and Medical Imaging Conference Commissioning of Upgrade Forward Hadron Calorimeters of CMS Burak Bilki On behalf of the CMS CollaborationAbstract-The CMS experiment at the Large Hadron Collider at CERN is upgrading the photodetector and readout system of the forward hadron calorimeter. During Long Shutdown 1, all of the original photomultiplier tubes were replaced with multianode, thin window photomultipliers. At the same time, the backend electronics were upgraded to µTCA-based readout. Here we report on the commissioning, operations and near future plans of the forward hadron calorimeters Phase I Upgrade.

Relative nonlinearity of BRIL luminometers derived from CMS mu scans

“…BRIL operates several detectors based on different physical principles and technologies. In this proceedings the hadron forward (HF) calorimeters [2,3] and the Fast Beam Conditions Monitor (BCM1F) [4] will be considered. HF detects Cherenkov radiation in quartz fibers.…”