Bartos, D.

Bercuci, A.

Caragheorgheopol, G.

Catanescu, V.

Constantin, F.

Petcu, M.

Petris, M.

Petrovici, M.

GSI Repository

Free running acquisition system for Transition Radiation Detectors - in beamtests -∗F. Constantin1, D. Bartos¸1, A. Bercuci1, G. Caraghergheopol1, V. Ca˘ta˘nescu1, M. Petris¸1, M. Petcu1,and M. Petrovici11Horia Hulubei National Institute for Physics and Nuclear Engineering, RomaniaThe present acquisition system was developed as a testbenchmark of a free running concept for high countingrate TRDs [1] based on FASP ASIC [2] and analog con-verters of the type foreseen to be implemented in a laterstage in a hybrid updated version of FASP analog pro-cessor. This version can operate 64 TRD readout chan-nels with a sample rate of 2 Msps and 12 bits resolutionMAX 11105 ADCs. The system is based on a Spartan 6,SP601 evaluation board and a custom designed board forMAX 11105 analog converters [3,4]. Two such systemswere built, each of them processing data from 32 pads.In order to merge the correlated data between several sub-detectors, a synchronization signal is used. The main tasksassumed by the system are: data unpacking from the 2 x32 MAX 11105 and synchronisation management, captureof the MBS sync signal from a MBS (Multi-Branch Sys-tem) system [5], packing the data and Ethernet transmis-sion through UDP protocol. The mixed acquisition sys-tem, a trigger driven (MBS) and the free running, gener-ates acquisition files which are later paired by a dedicatedsoftware. Data for TRD were collected based on the freerunning system described above while Cerenkov and LeadGlass by information was taken by the MBS system. Thecorrectness of the data synchronisation is proved by theelectron and pion pulse height distributions at three differ-ent momenta presented in Figures 1, 2 and 3.Figure 1: Pulse height distributions for electrons (red) andpions (blue) at 1 GeV/c momentumReferences[1] M. Petris et all Two dimension position sensitive real sizeCBM-TRD prototype. PHN-SIS18-ACC-38[2] V.Catanescu, CBM 10th Colaboration Meeting, Sept. 25-28,2007, Dresden∗Work supported by Romanian NASR/CAPACITATI-Modul III con-tract F02 and NUCLEU contract PN09370103Figure 2: 1.5 GeV/c momentumFigure 3: 3 GeV/c momentum[3] http://www.xilinx.com/publications/prod mktg/sp601 product brief.pdf[4] http://www.maximintegrated.com/en/datasheet/index.mvp/id/6419[5] https://www.gsi.de/work/fairgsi/common systems/csee electronics/datenverarbeitung/datenerfassung/mbs.htmMU-NQM-CBM-52 GSI SCIENTIFIC REPORT 201490 DOI:10.15120/GR-2015-1-MU-NQM-CBM-52

Free running acquisition system for Transition Radiation Detectors - in beam tests -

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Free running acquisition system for Transition Radiation Detectors - in beam tests -

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