System integration of the global trigger for the CMS experiment at CERN

Abstract

This document describes how existing control software for the Global Trigger system of the CMS experiment at CERN was adapted and integrated in the infrastructure of the CMS and Level-1 Trigger control software. Two frameworks building the support structure are outlined and libraries providing high level access to the Global Trigger hardware are described. The main focus of this document is the description of how fine grained control of the Global Trigger hardware is achieved and how a consistent, flexible and extensible way configuration for the system making use of access to a database was implemented. The layout of the database schema designed to comply with the requirements of the Global Trigger is part of the present thesis too. The document gives a selective and brief introduction for future developers continuing the work on this software.It could also serve as a pool of ideas for people working on control software for other Level-1 Trigger sub-systems.