Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 22: Instrumentation
HK 22.5: Vortrag
Montag, 4. März 2013, 18:00–18:15, HSZ-405
Triplet Based Online Track Finding in the PANDA-STT — •Marius C. Mertens, James Ritman, and Peter Wintz — Forschungszentrum Jülich GmbH
The PANDA-Experiment at the future FAIR-Facility in Darmstadt will implement a Straw Tube Tracker (STT) as its central tracking subdetector within a 2 T solenoidal magnetic field. The STT is a gas based detector for charged particle tracking which is comprised of 4636 cylindrical drift chambers (straw tubes) of 1 cm diameter and 150 cm length, surrounding a cylindrical volume from 16 cm up to a radius of 42 cm around the silicon based micro vertex detector.
At PANDA a continuous readout mode of the detectors is required due to the broad range of different event topologies and the very high interaction rate of 2·107 annihilations per second. As a consequence of this mode of operation the drift start time will not be given by the trigger time but it has to be extracted from either other detector hits or the signature of hit patterns in the STT itself.
One method of track finding without initial knowledge of the drift start time is based on the identification of hit triplets within a certain time window. It is then particularly simple to analytically calculate the circle parameters of the track helix’ projection into the xy-plane. We will present the triplet method in detail as well as studies on its applicability under the PANDA operating conditions.