Implementation and performance of the Detector Control System for the electromagnetic calorimeter of the CMS experiment

In this presentation we describe the main design objectives, the detailed specifications and the final layout of the Detector Control System (DCS) for the electromagnetic calorimeter (ECAL) of the CMS experiment. Emphasis is put on the system implementation and specific hardware and software solutions in each of its sub-systems. The latest results from the tests of final prototypes of these subsystems during the 2006 ECAL test-beam programme, as well as the installation and commissioning of the whole DCS at the CMS experimental construction site are discussed

Detector Control System for the Electromagnetic Calorimeter of the CMS experiment

The Compact Muon Solenoid (CMS) is one of the general purpose particle detectors at the Large Hadron Collider (LHC) at CERN. The challenging constraints on the design of one of its sub-detectors, the Electromagnetic Calorimeter (ECAL), required the development of a complex Detector Control System (DCS). In this paper the general features of the CMS ECAL DCS during the period of commissioning and cosmic running will be presented. The feedback from the people involved was used for several upgrades of the system in order to achieve a robust, flexible and stable control system. A description of the newly implemented features for the CMS ECAL DCS subsystems will be given as well

Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up

Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished, before installation, with cosmic ray muons and test beams. One fourth of the calorimeter was exposed to a beam of high energy electrons and the relative calibration of the channels, the intercalibration, was found to be reproducible to a precision of about 0.3%. Additionally, data were collected with cosmic rays for the entire ECAL barrel during the commissioning phase. By comparing the intercalibration constants obtained with the electron beam data with those from the cosmic ray data, it is demonstrated that the latter provide an intercalibration precision of 1.5% over most of the barrel ECAL. The best intercalibration precision is expected to come from the analysis of events collected in situ during the LHC operation. Using data collected with both electrons and pion beams, several aspects of the intercalibration procedures based on electrons or neutral pions were investigated

CMS physics technical design report : Addendum on high density QCD with heavy ions

Peer reviewe

The CMS ECAL Detector Control System

The challenging constraints on the design of the Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) experiment, such as rigorous temperature and voltage stability, imposed the development of a complex Detector Control System (DCS). In this paper the final layout and functionality of the CMS ECAL DCS are presented and the operational experience during the detector's commissioning and cosmic runs is discussed

The Detector Control System for the Electromagnetic Calorimeter of the CMS Experiment at the LHC

The purpose and layout of the detector control system for the CMS electromagnetic calorimeter (ECAL) are presented. The latest results from system prototype tests in the 2002-2004 ECAL testbeam programme, the current status of the system development and plans for its production, installation and commissioning are briefly discussed

Detector Control System for the Electromagnetic Calorimeter in the CMS Experiment Summary of the first operational experience

A full scale implementation of the Detector Control System (DCS) for the electromagnetic calorimeter (ECAL) in the Compact Muon Solenoid (CMS) experiment is presented. The operational experience from the ECAL commissioning at the CMS experimental cavern and from the first ECAL and global CMS data taking runs is discussed and summarized