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Information × Registration Number 0222U000252, 0121U112548 , R & D reports Title Solid-state fixed target mode at the LHCb experiment (CERN) and search for extreme states of matter in heavy-ion collisions at the Large Hadron Collider popup.stage_title Head Puhach Valerii M., Доктор фізико-математичних наук Registration Date 05-01-2022 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description2 In the frame of the upgrade of the LHCb experiment the radiation monitoring system RMS-R3, which was constructed in the INR, NAS of Ukraine applying the original technology of Metal-Foil Detectors, has been supplied to CERN. The installation of the RMS-R3 detector system to the nominal operating position in the LHCb experimental area approximately 2.2 m from the IP8 interaction point was performed. The system's data are being integrated into the LHCb global readout and control system. The RMS-R3 system also serves as a prototype of the elemental control of the dynamic position of the micro-targets in the LHC beam halo. The concept and design of a prototype of a target assembly with several independent micro-targets has been developed. A hybrid system of linear mechanical drive based on a miniature stepper motor and a MEMS motor is proposed for each target. First, the use of MEMS technology was discussed to control the position of micro-strip targets with a thickness and width of 1 μm and a length of up to 1 cm, that based on metal micro-strip technology created in the INR, NAS of Ukraine. To simulate the detector's response for the LHC beam collisions with a prototype of a solid-state microtarget Monte Carlo simulations were performed. The analysis of LHCb physical data was carried out on the generation of neutral strange hadrons in p-Pb collisions at an energy of 8.16 TeV in c.m.s. of nucleon pairs. Software scripts that allow parallelising process of data selection in many streams, on many computers have been developed. For preselected data different dependences on multiplicity, efficiency of particle reconstruction, momentum distribution, transverse momentum, rapidity, pseudo-rapidity, various multiplicity parameters and impact parameter are determined. Differential and double differential cross-sections of neutral K-meson and lambda-baryon production as a function of rapidity y and transverse momentum pT were measured. Product Description popup.authors Dobishuk Vasyl M Koliiev Serhii M Kot Olexander A Chernyshenko Serhii B popup.nrat_date 2022-03-09 Close