Speaker
Dr
JUAN PALACIOS
(CERN)
Description
The LHCb alignment framework allows clients of the LHCb detector description software
suite (DetDesc) to modify the position of components of the detector at run-time and
see the changes propagated to all users of the detector geometry. DetDesc is used in
the simulation, digitization and reconstruction phases of data processing and the
alignment framework is available in all these stages.
The alignment framework provides a very easy way to implement deviations from the
LHCb design alignment, allowing tasks such as reconstruction with a detector with
off-nominal alignment and misalignment simulation studies. It also allows for tasks
that require a dynamic change in the alignment constants of the detectors, like
iterative alignment algorithms.
Components of the LHCb detector will be re-aligned after each fill, and the changes
in the alignment constants will be required for on-line and off-line reconstruction.
The alignment framework is deeply coupled to the LHCb Conditions Database, adding
automatic time-dependent updating of alignment information to all LHCb software.
The requirements, design and implementation of the Alignment framework shall be
presented and illustrated with results from performance studies.
Primary author
Dr
JUAN PALACIOS
(CERN)
Co-authors
Dr
MARCO CLEMENCIC
(CERN)
Dr
NICOLAS GILARDI
(THE UNIVERSITY OF EDINBURGH)
