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HK: Fachverband Physik der Hadronen und Kerne
HK 10: Instrumentierung II
HK 10.8: Vortrag
Montag, 15. März 2010, 18:15–18:30, HG ÜR 6
An FPGA helix tracking algorithm for PANDA — •David Münchow1, Martin Galuska1, Thomas Geßler1, Wolfgang Kühn1, Jens Sören Lange1, Yutie Liang1, Ming Liu1, Stefano Spataro2, and Björn Spruck1 — 1Justus Liebig University Gießen, Germany — 2University of Torino, Italy
An online track finder for the PANDA experiment at the future FAIR facility was developed and tested.
The central Panda tracking detectors for charged particles will consist of a silicon based micro vertex detector (MVD, 5-7 hits/track) and possibly of a straw tube tracker (STT, 15 double layers of straws). Due to the solenoidal magnetic field, tracks of charged particles can be parametrized by a helix (if neglecting energy loss).
The algorithm works in several steps. Perpendicular to the beam direction the projection of the tracks is equivalent to a circle. Thus, first a conformal transformation will be used to convert the circles to straight lines. Second, a Hough transform is used to find the straight lines by a peak finding algorithm. Along the beam direction, a different Hough transformation is used.
As the algorithm was developed for an FPGA, it uses lookup tables. Possible FPGA implementation will be discussed.
This work is supported by BMBF – grant-no.: 06 GI 9107I and HICforFAIR