Mainz 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 11: Instrumentation
HK 11.5: Vortrag
Montag, 19. März 2012, 17:45–18:00, P 2
Particle identification using clustering algorithms — •Roland Wirth1,2, Enrico Fiori1,2, Bastian Löher1,2, and Deniz Savran1,2 — 1ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum, Darmstadt, Germany — 2Frankfurt Institute for Advanced Studies FIAS, Frankfurt
Particle identification (PID) is an important task for many experimental techniques. A well-known approach for PID in many detection systems is based on pulse shape analysis (PSA), i.e. identification based on the difference in the pulse shape produced by different particle species. In most methods specific features of the detector signals are analyzed employing profound knowledge of the involved pulse shapes and the need of precise adjustments for individual detectors. A new approach to achieve PID based on PSA uses clustering algorithms without making any assumptions on the shape of detector pulses and is thus applicable to many detector types. The method is also self-tuning, i.e. no adjustment to a specific detector is necessary. In this talk a method is presented that uses the fuzzy c-means clustering algorithm and has already been applied to liquid scintillators for γ-n discrimination [1]. The same method can be used without modifications to perform γ-p discrimination for CsI(Tl) scintillator signals and in particular produces identical results for different individual detectors.
* Supported by the Alliance Program of the Helmholtz Association (HA216/EMMI)
[1] D. Savran et al., Nucl. Inst. and Meth. A, 624 (2010) 675