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Upgrade of the ALICE Inner Tracking System
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SYSNO ASEP 0458947 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Upgrade of the ALICE Inner Tracking System Author(s) Kushpil, Svetlana (UJF-V) RID, ORCID, SAI Number of authors 1 Source Title Journal of Physics Conference Series, International Conference on Particle Physics and Astrophysics (ICPPA-2015), 675. - Bristol : IOP Publishing, Ltd., 2016 - ISSN 1742-6588 Pages s. 012038 Number of pages 4 s. Publication form Print - P Action International Conference on Particle Physics and Astrophysics Event date 05.10.2015 - 10.10.2015 VEvent location Moscow Country RU - Russian Federation Event type WRD Language eng - English Country GB - United Kingdom Keywords ALICE detector ; LHC ; electronics readout Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects LG13031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UJF-V - RVO:61389005 UT WOS 000372460100038 EID SCOPUS 84966376734 DOI 10.1088/1742-6596/675/1/012038 Annotation ALICE detector was constructed to study the properties of hot and dense hadronic matter formed in relativistic nuclear collisions. During the second long LHC shutdown in 20192020, the collaboration plans to upgrade the current vertex detector, the Inner Tracking System (ITS), in order to increase the reconstruction accuracy of secondary vertices and to lower the threshold of particle transverse momentum measurement. The upgrade strategy of ITS is based on the application of new Monolithic Active Pixel Sensors (MAPS) designed in 0.18 mu m CMOS technology. The 50 mu m thick chip consists of a single silicon die incorporating a 0.18 mu m high-resistivity silicon epitaxial layer (sensor active volume) and matrix of charge collection diodes (pixels) with readout electronics. Radiation hardness of the upgraded ITS is one of the crucial moments in the overall performance of the system. A wide set of MAPS structures with different read-out circuits was produced and is being studied by the ALICE collaboration to optimize the pixel sensor functionality. An overview of the ALICE ITS upgrade and the expected performance improvement will be presented together with selected results from a campaign that includes several irradiation and beam tests. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2017
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