Physics – Instrumentation and Detectors
Scientific paper
1999-02-02
Physics
Instrumentation and Detectors
11 pages, 8 figures
Scientific paper
CMS ECAL physicists must be able to extract physics characteristics from the ECAL construction database for the calibration of sets of detector components. Other applications, such as geometry for simulation and physics event reconstruction, will also need to extract data from the construction database. In each case, application software needs to query the construction database and to extract data that satisfies a particular view. These viewpoints are defined for a specific purpose (e.g. simulation, slow control, calibration) and data must be extracted into the viewpoint for a set of defined detector components (e.g. readout channels) called physics elements. The ECAL construction database follows an object-oriented design to maximise flexibility and reusability. An meta-modelling approach has been taken in its design, which promotes self-description and a degree of data independence. A query facility is being provided to allow navigation around so-called meta-objects in the construction database, facilitating the extraction of physics data into a particular viewpoint. This paper outlines how viewpoints can be populated with data extracted from the construction database, for a set of detector elements relevant for analysis.
Dobrzynski L.
Kovács Zoltán
Le Goff Jean-Marc
Martin Francisco
McClatchey Richard
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