Speaker
Mr
Sergio Gonzalez-Sevilla
(Instituto de Fisica Corpuscular (IFIC) UV-CSIC)
Description
It is foreseen that the Large Hadron Collider will start its
operations and collide proton beams during November 2007. ATLAS is one of the
four LHC experiments currently under preparation. The alignment of the ATLAS
tracking system is one of the challenges that the experiment must solve in
order to achieve its physics goals. The tracking system comprises two silicon
technologies: pixel and microstrip plus a transition radiation detector. The
alignment of the system requires a the determination of more than 36000
degrees of freedom. The precision required for the most sensitive coordinate
of the devices is of the order of few microns. This precision should be
attained with a track based alignment and from the application of complex
alignment algorithms. They require an extensive CPU and memory usage as large
matrix inversion and many iterations algorithms are used. The alignment
algorithms have been already exercised on several challenges as a Combined
Test Beam, Cosmic Ray runs (at the surface and in the pit) and large scale
computing simulation of physics samples. This note reports on the methods,
their computing requirements and its preliminary results.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | ATLAS |
|---|
Author
Dr
Salvador Marti I Garcia
(Instituto de Fisica Corpuscular (IFIC) UV-CSIC)
Co-authors
Dr
Jochen Schieck
(Max-Planck-Institut fuer Physik Muenchen)
Mr
Sergio Gonzalez-Sevilla
(Instituto de Fisica Corpuscular (IFIC) UV-CSIC)
Mr
Tobias GOETTFERT
(Max-Planck-Institut fuer Physik Muenchen)
