Performance of CMS hadron calorimeter timing and synchronization using test beam, cosmic ray, and LHC beam data

Analyses of test beam data using the CALICE calorimeter

We discuss several features of hadronic showers recorded in the high granularity CALICE Si-W ECAL and scintillator-tile HCAL and confront them with several Geant4 physics models. The first measurements of the time-structure of hadronic showers in a tungsten scintillator calorimeter are presented. The high granularity of the CALICE calorimeters allows a software compensation which improves the e...

CMS Central Hadron Calorimeter

We present a description of the CMS central hadron calorimeter. We describe the production of the 1996 CMS hadron testbeam module. We show the results of the quality control tests of the testbeam module. We present some results of the 1995 CMS hadron testbeam. The design of the CMS detector starts with the 4 T solenoidal magnet of length 13 m and inner diameter 5.9 m. The magnet determines many...

The CMS Tracker front - end and control electronics in an LHC like beam test

A complete prototype of the CMS tracker read-out and control system has been built using components as close as possible to the final design. It is based on an amplifier and analogue pipeline memory chip (APV), analogue optical links transmitting at 40Ms/s and a VME mounted digitisation and data handling board (FED-PMC), supplemented by a control architecture based on FECs which set and monitor...

The CMS crystal calorimeter for the LHC

The CMS crystal calorimeter, comprising about 80,000 scintillating lead tungstate crystals read out by avalanche photodiodes (in the barrel) and vacuum phototriodes (in the endcap), is designed to give excellent energy resolution in the demanding LHC environment. It is now entering the construction phase. A status report on the project is presented, including recent results from test beam verif...

Impact of the LHC Beam Abort Kicker Prefire on High Luminosity Insertion and CMS Detector Performance