Abstract

The main task of the Tile calorimeter Detector Control System (DCS) is to enable the coherent and safe operation of the calorimeter. All actions initiated by the operator, as well as all errors, warnings and alarms concerning the hardware of the detector are handled by DCS. The Tile calorimeter DCS controls and monitors mainly the low voltage and high voltage power supply systems, but it is also interfaced with the infrastructure (cooling system and racks), the calibration systems, the data acquisition system, configuration and conditions databases and the detector safety system.

Highlights

  • T HE Tile Calorimeter (TileCal) is one of the sub-detectors of the ATLAS experiment

  • Part of the Front End (FE) electronics and photomultiplier tubes (PMTs) are located at the rear of the TileCal modules, in the so-called electronics drawers

  • Photomultipliers gains can change with time and new calibration needs to be applied, so it is necessary to store all the values set during the lifetime of the experiment in a database

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Summary

INTRODUCTION

T HE Tile Calorimeter (TileCal) is one of the sub-detectors of the ATLAS experiment. It is a sampling calorimeter made of steel plates (absorber) and scintillating tiles (active material) readout by wavelength shifting optical fibers. The TileCal consists of one barrel and two extended barrel parts These three sections are further sub-divided into 4 partitions – EBA, LBA, LBC and EBC (standing EB and LB for Extended Barrel and Long Barrel, respectively). The control system must allow remote diagnosis This is ensured by the Detector Control System (DCS) [2], [3], which is responsible for safe and coherent operation of the detector. All ATLAS sub-detectors have their own local DCS, which detailed architecture strongly depends on the structure of the general DCS system of the ATLAS experiment and on electronics architecture and mechanical issues of the sub-detector itself

BACK END SYSTEM OF THE TILECAL DCS
THE TILECAL MAIN DCS SYSTEMS
The High Voltage Distribution System
The Low Voltage Distribution System
Cooling system
SOFTWARE
DCS DATA ANALYSIS
FINITE STATE MACHINE
VIII. DATA STORING
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