TY  - CONF
AU  - Wüstner, Peter
AU  - Erven, Andreas
AU  - Erven, Wilhelm
AU  - Kemmerling, Günter
AU  - Kleines, Harald
AU  - Kulessa, Pawel
AU  - Maciniewski, Pawel
AU  - Ohm, Henner
AU  - Pysz, Krzysztof
AU  - Serdyuk, Valeriy
AU  - van Waasen, Stefan
AU  - Wintz, Peter
TI  - Sophisticated Online Analysis in ADC Boards
M1  - FZJ-2013-00617
PY  - 2012
AB  - For the readout of the calorimeter of the WASA at COSY experiment a QDC board using sampling ADCs and FPGAs to perform the pulse integration was developed. In the initial version only a simple pulse finding algorithm was implemented in order to avoid delay cables by storing the digitized signals in a pipeline of a few microseconds. Recently a new version with 16 ADCs at a sample rate of 240 MHz and 12 Bit resolution was developed for tests of cylindrical drift chambers (straw tubes) in the Straw Tube Tracker of the PANDA experiment. The goal was to measure the energy loss by charge readout in addition to drift time measurement. Due to the irregular cluster structure of the straw signals complex algorithms for pulse finding, pulse feature extraction and triggering were implemented. The algorithm can detect pile up and find pulse groups. Integration is possible over single pulses and over complete groups. Different methods for the calculation of starting time, including constant fraction, are implemented. Internal trigger generation depends on various criteria, e.g. slew rate, amplitude or sum of consecutive samples.
T2  - 2012 IEEE Real-Time Conference
CY  - 11 Jun 2012 - 15 Jun 2012, Berkeley, California (USA)
Y2  - 11 Jun 2012 - 15 Jun 2012
M2  - Berkeley, California, USA
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/129096
ER  -