Speaker
Description
Today the studies of the hadron yields containing heavy quarks are of particular interest for high-energy physics. These yields are characterized by small cross-sections for interaction with the nuclear medium. As a result, for the processes of relativistic nuclear collisions the information about the states of nuclear matter (arising in such processes) could be obtained. In this case, the efficient identification of strange and charmed particles registered by the experimental setup plays an important role in the analysis of possible phase transitions. In addition, at the energies of the colliding nuclei which are accelerated in Nuclotron-based Ion Collider fAcility (NICA) [1], it is possible to study clusters of dense nuclear matter arising inside the nuclei. Therefore, for precise registration of short-lived particles produced in nucleus-nucleus collisions the Vertex detector based on silicon monolithic active pixel detectors (as a part of the Multi-Purpose Detector (MPD) experiment) was proposed.
In present overview the properties of silicon monolithic active pixel detectors (developed for the upgraded Inner Tracing System of ALICE experiment in CERN [2]) together with new ultralight, radiation-transparent carbon fiber support structures as basic elements for Vertex detector of MPD experiment will be discussed. To investigate the tracking efficiency and main characteristics of the silicon pixel detectors, the comprehensive studies with a variety of gamma, beta sources and also with cosmic rays were carried out.
Acknowledgments: the reported study was supported by RFBR, research project No. 18-02-40075.
[1] V.Kekelidze, V.Matveev, I.Meshkov, A.Sorin, G.Trubnikov, Project Nuclotron-based Ion Collider Facility at JINR. Physics of Particles and Nuclei, 2017, Vol. 48, No. 5, pp. 727–741.
[2] ALICE collaboration, Technical design report for the upgrade of the ALICE Inner Tracking System, Journal of Physics G: Nuclear and Particle Physics, vol. 41, iss. 8, P087002, 2014.
