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Scientific Visualization
| Issue Year: | 2014 |
| Quarter: | 1 |
| Volume: | 6 |
| Number: | 1 |
| Pages: | 1 - 19 |
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| Article Name: |
EVENT VISUALIZATION OF THE MPD EXPERIMENT AT THE NICA COLLIDER FOR THE MONITORING SYSTEM |
| Authors: |
K. Gertsenberger (Russian Federation), S. Merz (Russian Federation), E. Chepin (Russian Federation) |
| Address: |
K. Gertsenberger
gertsen@jinr.ru
Joint Institute for Nuclear Research, Dubna, Russian Federation
S. Merz
sergey.merts@gmail.com
Joint Institute for Nuclear Research, Dubna, Russian Federation
E. Chepin
chepin@dozen.mephi.ru
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russian Federation |
| Abstract: |
One of the problems to be solved in high energy physics experiments on particle collisions (or fixed target experiments) is online visual presentation of the events during the experiment run. The article describes the implementation of this task for the future experiment MPD (Multi-Purpose Detector) at the NICA (Nuclotron-based Ion Collider fAcility) collider under construction at the Joint Institute for Nuclear Research in Dubna. The aims of the NICA complex are discussed briefly, as well as the structure of the multipurpose detector (MPD) for the study of hot and dense baryonic matter in collisions of heavy ions in the atomic mass range A=1–197 at a centre-of-mass energy up to 11 GeV (for Au79+). The developed approach implementing fast point reconstruction of primary and secondary particle tracks in collisions of heavy ions in the MPD detector is presented. In particular the article considers parallelizing the most time-consuming function – hit reconstruction of the TPC (time projection chamber) read- out pads, to accelerate the event visualization and consequently to increase the number of the events viewed in the monitoring system per second. The processing time values and speed-up coefficients are given for average and low multiplicities of the simulated data. The analytical modeling for execution of the parallel point reconstruction of particle tracks for a larger number of processors was used, the structure of parallel hardware platform for selective event monitoring is proposed. The implemented visualization system of the MPD geometry and collision events in the multipurpose detector, which is a part of the MPDRoot software being developed for the experiment, is considered. The example of graphical representation of the MPD geometry and reconstructed points of tracks is given for a central Au-Au collision. |
| Language: |
Russian |
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