Time-Projection Chamber Development for the Multi-Purpose Detector in the NICA Project
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me-Projection Chamber Development for the Multi-Purpose Detector in the NICA Project A. V. Averyanova, A. G. Bazhazhina, V. F. Chepurnova, V. V. Chepurnova, G. A. Cheremukhinaa, O. V. Fateeva, Yu. T. Kiriushina, A. O. Kolesnikova, J. Lukstinsa, S. A. Movchana, A. V. Pilyara, S. V. Razina, A. A. Ribakova, V. A. Samsonova, S. V. Vereschagina, *, S. A. Zaporozhetsa, and V. N. Zrueva aJoint
Institute for Nuclear Research, Dubna, Moscow oblast, 141980 Russia *e-mail: [email protected]
Abstract—Within the framework of the scientific program for the study of hot and dense nuclear matter in the Veksler and Baldin Laboratory of High Energy Physics of the Joint Institute of Nuclear Research, Dubna (JINR), the NICA megaproject (Nuclotron-based Ion Collider fAcility) based on the Nuclotron-M accelerator is implemented. The new accelerator facility will make it possible to research the properties of dense baryonic matter in the collision of heavy ions in a wide range of atomic masses from p–p collisions in the energy range √Spp = 12–27 GeV/n and d + d collisions with energies of √SNN = 4–13.8 GeV/n with the average luminosity L = 1032 cm–2 s–1 up to Au+79 + Au+79 collisions in the energy range √SNN = 4–11 GeV/n with the average luminosity L = 1027 cm–2 s–1 (Au+79). A collider provides two points of intersection of beams, in one of which the multipurpose detector (Multi-Purpose Detector, MPD) will be installed. The time-projection gas chamber (TPC) is the main tracking detector and the particle identifier of the Multi-Purpose Detector. The article considers the structure of the MPD, the design and the main working parameters of TPC and its subsystems. The front-end electronics (FEE), as well as the procedure for assembling and integrating the TPC into the MPD are discussed. Keywords: time-projection chamber (TPC), multi-wire proportional chambers (MWPC), front-end electronics (FEE), front-end card (FEC), laser calibration, gas system, cooling system DOI: 10.1134/S1063779618040093
CONTENT 1. INTRODUCTION 2. TIME-PROJECTION CHAMBER (TPC) 3. TPC DESIGN 4. READOUT CHAMBER (ROC) 5. FRONT-END ELECTRONICS (FEE) 6. LASER CALIBRATION SYSTEM 7. COOLING SYSTEM 8. GAS SYSTEM 9. CONCLUSIONS
phase diagram, and the high collider luminosity (L = 1027 cm–2 s–1) makes it possible to record the desired number of events for even very rare processes.
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1. INTRODUCTION The research of hot and dense nuclear matter is an urgent problem in studying heavy ion collisions. The transition of hadronic matter into the quark-gluon plasma state is of interest. The range of energy of collisions (√SNN = 4–11 GeV) and the diversity of colliding nuclei of the NICA accelerator facility [1–3], at which the multipurpose detector (MPD) will be installed, makes it possible to study a large area of the
With the MPD we can measure the tracks of charged particles produced in the collisions of accelerated ions in the wide region of pseudorapidities |η| < 3 and collision rate up to 7 kHz. The schematic view of MPD is shown in Fig. 1.
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