Bergmann, C.

Emschermann, D.

Garcia, C.

Kebschull, U.

Krieger, M.

GSI Repository

Beamtest results of the CBM-TRD feature extraction using SPADIC v1.0∗C. Garcia1, C. Bergmann2, D. Emschermann2, M. Krieger3, and U. Kebschull11Infrastructure and Computer Systems for Data Processing (IRI), Frankfurt University, Frankfurt/Main, Germany;2Institute fu¨r Kernphysik, Mu¨nster, Germany; 3ZITI, Heidelberg University, GermanyThe feature extraction is a data processing stage of theproposed data acquisition chain (DAQ) for the CBM/TRDexperiment aiming to deliver event-filtered and bandwidth-reduced data to the First Level Event Selection (FLES). Thefeature extraction processing stage will be implementedat the Data Processing Board (DPB) located in the TRD-DAQ. A data rate of about 1TB/s and a high event rateof approximately 10 MHz is expected for the final experi-ment [1].In October and November 2012 a common CBM sub-systems (RICH/TRD/TOF) beam test was performed atthe CERN Proton Synchrotron (PS) T9 accelerator beam-line [2]. A full size (59×59 cm2) TRD detector proto-type from Mu¨nster [3], with an amplification/drift region of7.0/5.0 mm was used for this experimentation. The readoutand signal processing of the TRD module was performedby the Self-triggered Pulse Amplification and DigitizationasIC (SPADIC) version 1.0 [4]. The SPADIC chip readsout 32 channels in self-triggered mode and, compared tothe previous SPADIC v0.3 chip, it implements new fea-tures which are of importance for the feature extraction(e.g. neighbor channel-trigger readout).Figure 1: Full size TRD prototype and SPADIC v1.0 PCB.Experimental setup in the CERN PS/T9 in 2012.In order to perform further developments for the featureextraction stage, obtaining real data samples from TRD fullsize prototypes by means of the new SPADIC v1.0 chip,was one of the main purposes during the beam test in theCERN PS T9. The experimental data acquisition setup wascomposed of the SPADIC v1.0 connected by a HDMI ca-ble to a Readout Controller (ROC). The latter was inter-faced with an optical connection to an Active Buffer Board(ABB) in a data acquisition computer. The communicationprotocol used was CBMnet 2.0 [5]. An effective area of16 channels were read out in self-triggered mode, however,∗Work supported by BMBF (06HD9123I, 06FY7090)a total area of 8 channels were read out using the neigh-bor channel-trigger feature. A set of recorded data was ac-quired during the beam test, however, this data set lacks ofsynchronization to any other subsystem detector.Figure 2: Left plot, reconstructed TRD cluster for a singleparticle. Right plot, hit position approximation by a fit ontotal charge deposition. The central fit line indicates thereconstructed hit position.An online cluster reconstruction is currently being de-signed using beam test data. Even if it is not possible toreconstruct the whole physical event, it helps to simulatespecific high particle rates scenarios in order to develop aDPB feature extraction module. As shown in Figure 2, a3 pad cluster and its approximated position reconstructionwere obtained using a clusterizer algorithm that is easilyparallelizable. Furthermore, the firmware migration of theactual feature extraction processing board (Xilinx SP605FPGA) into the new SysCore v3 [6] will be one of the maintasks in 2013.References[1] J. de Cuveland and V. Lindenstruth, J. Phys. Conf. Ser. 331(2011) 022006[2] D. Emschermann et al., “Common CBM beam test of theRICH, TRD and TOF subsystems at the CERN PS T9 beamline in 2012”, GSI Scientific Report 2012[3] C. Bergmann et al., “Test of Mu¨nster CBM TRD prototypesat the CERN PS/T9 beam line”, GSI Scientific Report 2012[4] T. Armbruster et al., “SPADIC 1.0 a Self-triggered Ampli-fier/Digitizer ASIC for CBM-TRD”, CBM Progress Report2012[5] F. Lemke et al., “Status of CBMnet integration and HUB de-sign”, CBM Progress Report 2012[6] J. Gebelein et al., “SysCore3 A universal Read Out Con-troller and Data Processing Board”, GSI Scientific Report2012GSI SCIENTIFIC REPORT 2012 PHN-NQM-EXP-3463

Beamtest results of the CBM-TRD feature extraction using SPADIC v1.0

http://repository.gsi.de/record/51968/files/PHN-NQM-EXP-34.pdf

Beamtest results of the CBM-TRD feature extraction using SPADIC v1.0

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