Dr Paul Miyagawa (University of Manchester)
The ATLAS solenoid produces a magnetic field which enables the Inner Detector to measure track momentum by track curvature. This solenoidal magnetic field was measured using a rotating-arm mapping machine and, after removing mapping machine effects, has been understood to the 0.05% level. As tracking algorithms require the field strength at many different points, the representation of this magnetic field in Athena (the ATLAS offline software framework) can have a significant impact on the processing time for these algorithms. We review the field models and mathematical techniques used to decouple machine effects from real field features and evaluate the performance of different field representations within Athena.
|Submitted on behalf of Collaboration (ex, BaBar, ATLAS)||ATLAS|
Dr Jochen Schieck (Max-Planck-Institut fuer Physik Muenchen)