THE TOTEM DETECTOR CONTROL SYSTEM

The detectors of the TOTEM experiment at the LHC (Roman Pots silicon detectors, CSC & GEM) require the monitoring and control of the usual equipment used in HEP: HV/LV power supplies, VME crates and environmental sensors readout using ELMBs or through the DCU technology. Moreover, while most of the LHC experiments exploit fixed detectors, the TOTEM DCS -Big Brother- includes the control of movable parts (the Roman Pots) to keep the sensors at a specified distance from the beams. The TOTEM DCS differs from those of other LHC experiments in many ways. Engineering and project management follow a structured approach inspired by the ESA ECSS collaborative space standards. Project phasing and planning is done with GDPM on a weekly basis. The collection of functional and technical requirements uses an extension of the ALICE strategy. The Configuration Management is organized using SubVersioN. Also a set of scripts is developed to transform formal requirement representations into SW configuration (PVSS).