Real-Time data processing pipeline for trigger readout board-based data acquisition systems
A. Malige, G. Korcyl, M. Firlej, T. Fiutowski, M. Idzik, B. Korzeniak, R. Lalik, A. Misiak, A. Molenda, J. Moroń, N. Rathod, P. Salabura, K. Świentek, P. Wintz
abstract
Large-scale physics experiments running at high interaction rates place a high demand on the data acquisition system (DAQ) responsible for transporting the data from the detector to the storage. The antiProton ANihilation at DArmstadt (PANDA) at the facility for anti-proton and ion research (FAIR) is one such experiment of the future that will not use fixed hardware triggers; instead, the event selection is based on real-time feature extraction, filtering, and high-level correlations. A firmware framework for such real-time data processing has been developed and tested with hardware setup for a PANDA Forward Tracker (FT) prototype. The solution is applicable for other detector subsystems based on the so-called Trigger Readout Board (TRB) data read-out system.
Pressure stabilized straw tube modules for the PANDA Forward Tracker
J. Smyrski, T. Fiutowski, P. Gianotti, A. Heczko, M. Idzik, M. Kajetanowicz, G. Korcyl, B. Korzeniak, R. Lalik, E. Lisowski, A. Malarz, W. Migdal, A. Misiak, W. Przygoda, J. Ritman, P. Salabura, M. Savrie, K. Swientek, P. Wintz, A. Wronska
abstract
The design of straw tube detector modules developed for the PANDA Forward Tracker is presented. One module consists of 32 straws with 10 mm diameter, arranged in two staggered layers, and has a very low material budget of only 8.8.10(-4 )X(0). The overpressure of the working gas mixture of 1 bar makes the module self-supporting and enables the use of lightweight and compact support frames. Detection planes in the Forward Tracker consist of modules mounted closely, without gaps, next to each other on a support frame. A module can be mounted and dismounted from the frame without the need to remove the neighboring modules, enabling fast repairs. Technical details of the detector design and the assembly procedure of the straw tubes and the straw modules as well as results of performed tests of the modules are given.
Drift chamber with a c-shaped frame
J. Smyrski, Ch. Kolf, H.-H. Adam, A. Budzanowski, R. Czyzykiewicz, D. Grzonka, A. Heczko, M. Janusz, L. Jarczyk, B. Kamys, A. Khoukaz, K. Kilian, P. Kowina, A. Misiak, P. Moskal, W. Oelert, C. Piskor-Ignatowicz, J. Przerwa, C. Quentmeier, T. Rozek, R. Santo, G. Schepers, T. Sefzick, M. Siemaszko, A. Taschner, P. Winter, M. Wolke, P. Wustner, W. Zipper
abstract
We present the construction of a planar drift chamber with wires stretched between two arms of a c-shaped aluminium frame. The special shape of the frame allows to extendthe momentum acceptance of the COSY-11 detection system towards lower momenta without suppressing the high momentum particles. The proposed design allows for construction of tracking detectors covering small angles with respect to the beam, which can be installed and removed without dismounting the beam-pipe. For a three-dimensional track reconstruction a computer code was developed using a simple algorithm of hit preselection.
Threshold electrodisintegration of He-3
RS. Hicks, A. Hotta, S. Churchwell, X. Jiang, GA. Peterson, J. Shaw, B. Asavapibhop, MC. Berisso, PE. Bosted, K. Burchesky, RA. Miskimen, SE. Rock, I. Nakagawa, T. Tamae, T. Suda, J. Golak, R. Skibiński, H. Witała, F. Casagrande, W. Turchinetz, A. Cichocki, K. Wang, W. Glockle, H. Kamada, T. Kobayashi, A. Nogga
abstract
Cross sections were measured for the near-threshold electrodisintegration of He-3 at momentum transfer values of q = 2.4, 4.4, and 4.7 fm(-1). From these and prior measurements the transverse and longitudinal response functions R-T and R-L were deduced. Comparisons are made against previously published and new nonrelativistic A = 3 calculations using the best available nucleon-nucleon NN potentials. In general, for <2 fm(-1) these calculations accurately predict the threshold electrodisintegration of He-3. Agreement at increasing q demands consideration of two-body terms, but discrepancies still appear at the highest momentum transfers probed, perhaps due to the neglect of relativistic dynamics, or to the underestimation of high-momentum wave-function components.
The He-3(e, e ' d)p reaction in (q, omega)-constant kinematics
CM. Spaltro, TS. Bauer, HP. Blok, T. Botto, E. Cisbani, R. De Leo, GE. Dodge, R. Ent, S. Frullani, F. Garibaldi, W. Glockle, J. Golak, MN. Harakeh, M. Iodice, E. Jans, H. Kamada, WJ. Kasdorp, C. Kormanyos, L. Lapikas, A. Misiejuk, SI. Nagorny, GJ. Nooren, CJG. Onderwater, R. Perrino, M. van Sambeek, R. Skibiński, R. Starink, G. van der Steenhoven, J. Tjon, MA. van Uden, GM. Urciuoli, H. de Vries, H. Witała, M. Yeomans
abstract
The cross section for the He-3(e, c' d)p reaction has been measured as a function of the missing momentum p(m) in (q, omega)-constant kinematics at beam energies of 370 and 576 MeV for values of the three-momentum transfer q of 412, 504 and 604 MeV/c. The L(+ TT), T and LT structure functions have been separated for q = 412 and 504 MeV/c. The data are compared to three-body Faddeev calculations, including meson-exchange currents (MEC), and to calculations based on a covariant diagrammatic expansion. The influence of final-state interactions and meson-exchange currents is discussed. The p(m)-dependence of the data is reasonably well described by all calculations. However, the most advanced Faddeev calculations, which employ the AV 18 nucleon-nucleon interaction and include MEC, overestimate the measured cross sections, especially the longitudinal part, and at the larger values of q. The diagrammatic approach gives a fair description of the cross section, but under(over)estimates the longitudinal (transverse) structure function. (C) 2002 Elsevier Science B.V. All rights reserved.
q and p(m) dependence of the He-3(e,e ' d)p reaction
CM. Spaltro, TS. Bauer, HP. Blok, T. Botto, E. Cisbani, R. De Leo, GE. Dodge, R. Ent, S. Frullani, F. Garibaldi, W. Glockle, J. Golak, MN. Harakeh, M. Iodice, E. Jans, H. Kamada, WJ. Kasdorp, C. Kormanyos, L. Lapikas, A. Misiejuk, SI. Nagorny, GJ. Nooren, CJG. Onderwater, R. Perrino, MJM. van Sambeek, R. Starink, G. van der Steenhoven, J. Tjon, MA. van Uden, GM. Urciuoli, H. de Vries, J. Witała, DM. Yeomans
abstract
The cross section for the He-3(e, e'd)p reaction has been measured for a range of missing momentum p, at incident electron energies of 370 and 576 MeV and for values of the three-momentum transfer q of 412, 504, and 604 MeV/c. The longitudinal and transverse structure functions have been separated for q = 412 and 504 MeV/c. The data are compared to exact three-body Faddeev calculations and calculations based on a covariant, gauge-invariant diagrammatic expansion. In general, fair to good agreement is observed, but there are some differences between the data and the calculations, especially for the q dependence and for the transverse structure function W-T.
