Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Instrumentierung - Poster

HK 39.54: Poster

Mittwoch, 23. März 2011, 14:00–16:00, Foyer Chemie

Online feature extraction for the PANDA Electromagnetic Calorimeter — •Elmaddin Guliyev, Ganesh Tambave, Myroslav Kavatsyuk, and Herbert Loehner — KVI, University of Groningen, The Netherlands

Resonances in the charmonium mass region will be studied in antiproton annihilations at FAIR with the multi-purpose PANDA spectrometer providing measurements of electromagnetic signals in a wide dynamic range. The Sampling ADC (SADC) readout of the Electromagnetic Calorimeter (EMC) will allow to realize online hit-detection on the single-channel level and to derive time and energy information. A digital filtering and feature-extraction algorithm was developed and implemented in VHDL code for the online application in a commercial SADC. We will discuss the readout scheme, the program logic, the precise signal amplitude detection with phase correction at low sampling frequencies, and the usage of a double moving-window deconvolution filter for the pulse-shape restoration. Such double filtering allows to operate the EMC at much higher rates and to minimize the amount of pile-up events.

This work is supported in part by BMBF and GSI.