Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)最新文献

{"title":"System design challenges for CO$_2$ evaporative cooling in tracking detectors","authors":"P. Tropea","doi":"10.22323/1.348.0046","DOIUrl":"https://doi.org/10.22323/1.348.0046","url":null,"abstract":"CO2 evaporative cooling has become one of the most popular thermal management technologies for silicon detectors to be operated at low temperature. At LHC, this solution is already in use on the LHCb Velo, the ATLAS IBL and the CMS Phase I Pixel. The LHCb Velo upgrade and the UT detectors will be cooled in the same way as of 2019, as well as ATLAS and CMS upgraded tracking and vertexing detectors for the HL-LHC (2025). In order to fully exploit the heat removal capacity which can be achieved with carbon dioxide in evaporative mode, the cooling system needs a very careful design, combining the process, the transfer lines and the on-detector evaporators. This work discusses the challenges for the design of an optimised CO2 cooling system, including the mechanics, the thermal interfaces and the process instrumentation for controls and monitoring. Examples of presently adopted solutions are given, together with their limits and the needed further development in order to achieve reliable systems of much higher cooling power as in HL-LHC detectors.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126699863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracking and vertexing in BELLE II","authors":"B. Scavino","doi":"10.22323/1.348.0040","DOIUrl":"https://doi.org/10.22323/1.348.0040","url":null,"abstract":"Belle II is a next generation B-factory experiment at the SuperKEKB collider. In early 2019 the fully operational detector will start taking data. The goal is to collect a statistics 50 times larger than the one collected by its predecessor Belle, namely an integrated luminosity of 50 ab−1. Belle II is designed for detecting and reconstructing particle trajectories for transverse momenta exceeding 50 MeV/c while providing excellent momentum resolution over a wide range of momentum. In this contribution, the tracking and vertexing algorithms implemented in the Belle II software framework are presented, together with the performances on simulated Υ(4S) → BB̄ events and on data collected during the detector commissioning phase.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123510432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Depleted CMOS sensors for HL-LHC","authors":"H. Pernegger","doi":"10.22323/1.348.0041","DOIUrl":"https://doi.org/10.22323/1.348.0041","url":null,"abstract":"The upgrade of the ATLAS tracking detector (ITk) for the High-Luminosity Large Hadron Collider at CERN requires the development of novel radiation hard silicon sensor technologies. For the development of monolithic CMOS sensors for ATLAS we develop fully depleted CMOS monolithic active pixel sensors (DMAPS) to achieve radiation hard CMOS sensors inline with ATLAS ITk specifications. Based on initial studies on prototype sensors we have now developed, produced and tested first full-size depleted CMOS sensors in different CMOS processes along two design approaches: Designs using \"small\" electrodes were produced in the TowerJazz 180nm imaging process and designs using \"large\" electrodes were manufactured in AMS 180nm and LFoundry 150nm CMOS processes. The sensors achieve full depletion of the detection layer through a combination of high-resistivity substrates and high bias voltages. The matrix readout architectures are optimised to cope with the LHC 25ns bunch structure and the high hit-rates as expected for the outermost ITk pixel layer. The paper introduces the different design approaches and will present measurements results to assess their performance in view of future applications as radiation hard monolithic CMOS sensors for trackers.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123289273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time resolution and radiation tolerance of depleted CMOS sensors","authors":"E. Figueras, Ángel Diéguez Barrientos, Oscar Alonso Casanovas","doi":"10.22323/1.348.0031","DOIUrl":"https://doi.org/10.22323/1.348.0031","url":null,"abstract":"","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Operational experience and commissioning of theBelle II vertex detector","authors":"B. Schwenker, F. Abudinén, K. Ackermann, P. Ahlburg, H. Aihara, M. Albalawi, O. Alonso, L. Andricek, R. Ayad, T. Aziz, V. Babu, S. Bacher, S. Bahinipati, Y. Bai, E. Barberio, T. Baroncelli, T. Baroncelli, G. Batignani, A. Bauer, V. Bertacchi, S. Bettarini, B. Bhuyan, T. Bilka, R. Blanco, F. Bosi, M. Boronat, L. Bosisio, A. Bozek, F. Buchsteiner, C. Camien, A. Caldwell, G. Caria, G. Casarosa, M. Ceccanti, D. Červenkov, V. Chekelian, T. Czank, N. Dash, B. Deschamps, Á. Diéguez, J. Dingfelder, Z. Doležal, D. Esperante, P. Fischer, F. Forti, M. Fras, A. Frey, M. Friedl, J. Fuster, M. Gabriel, K. Gadow, U. Gebauer, L. Germic, T. Gessler, D. Getzkow, L. Gioi, B. Gobbo, P. Gomis, K. Hara, M. Heck, T. Hemperek, M. Hensel, T. Higuchi, M. Hoek, C. Irmler, A. Ishikawa, I. Jaeglé, C. Joo, M. Kaleta, J. Kandra, N. Kambara, P. Kapusta, C. Kiesling, B. Kisielewski, D. Kittlinger, D. Klose, P. Kodyš, C. Koffmane, T. Kohriki, S. Koike, I. Komarov, I. Konorov, S. Krivokuca, H. Krüger, T. Kuhr, W. Kuhn, Manish Kumar, R. Kum","doi":"10.22323/1.348.0006","DOIUrl":"https://doi.org/10.22323/1.348.0006","url":null,"abstract":"The construction of the new accelerator at the Super Flavor Factory in Tsukuba, Japan, has been finalized and the commissioning of its detector (Belle II) has started. This new e$^{+}$e$^{-}$ machine (SuperKEKB) will deliver an instantaneous luminosity of $8times10^{35}mathrm{~cm}^{-2}mathrm{s}^{-1}$, which is 40 times higher than the world record set by KEKB. In order to be able to fully exploit the increased number of events and provide high precision measurements of the decay vertex of the B meson systems in such a harsh environment, the Belle II detector will include a new 6 layer silicon vertex detector. Close to the beam pipe, 2 pixel and 4 double-sided strip detector layers will be installed. \u0000During its first data taking period in 2018, the inner volume of the Belle II detector was only partially equipped with the final vertex detector technologies. The remaining volume was covered with dedicated radiation monitors, collectively called BEAST II, in order to investigate the particle and synchrotron radiation backgrounds near the interaction point. In this note, the milestones of the commissioning of the Belle II vertex detector and BEAST II are reviewed and the detector performance and selected background measurements will be presented.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132394887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review on depleted CMOS","authors":"T. Kugathasan","doi":"10.22323/1.348.0042","DOIUrl":"https://doi.org/10.22323/1.348.0042","url":null,"abstract":"Monolithic active pixel sensors (MAPS) integrate both sensor matrix and readout circuitry in one piece of silicon. Pixel sensors in commercial CMOS technologies receive increasing interest for vertex and tracking detectors. They have advantages in detector assembly, production cost, and other benefits like lower material and higher granularity. Used for the first time in the STAR experiment, adopted for the ALICE experiment, they are being considered for future detectors, like the ATLAS HL-LHC upgrade, FCC and CLIC. The most aggressive applications require full depletion in the sensing volume where charge collection by drift improves timing and radiation tolerance to high-intensity hadron fluences. This paper addresses the improvements and challenges of depleted CMOS with insights on sensor and circuit design.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125096220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Establishment of characterization system for testing multi silicon micro-strip sensors at the University of Delhi","authors":"C. Jain, G. Jain, A. Abhijeet, Ajay Kumar, A. Bhardwaj, K. Ranjan","doi":"10.22323/1.348.0053","DOIUrl":"https://doi.org/10.22323/1.348.0053","url":null,"abstract":"A major concern with the use of silicon sensor in nuclear and particle physics experiments is its survival in the intense radiation environment. The unprecedented increase in fluence in these experiments affects its long-term sustainability due to both bulk and surface damage, resulting in the deterioration of its static and dynamic properties. Hence, stringent tolerance criteria are imposed on these sensors to maintain the physics performance of an experiment. This necessitates the testing of the silicon sensors’ performance under temperature and humidity controlled, dark and dust free, environment. Our Group at the University of Delhi is in the process of establishing such a characterization system, for the first time in India, for testing a large array of silicon micro-strip sensors. A set of electrical characterization units, capable of providing 3000 V and measuring pico-Ampere currents and pico-Farad capacitances, are installed in the facility. Among other features, the probe station has a capability to translate in three directions, with a step size of 2 micro-meter over the range of 20 cm in XY directions. The entire system is interfaced through the Automated Characterization Suite (ACS) software and can be programmed in a such a way that one does not need to intervene manually as it switches from one silicon strip to another. Several measurements involving currents, capacitances and resistances can be performed for the total, strip and inter-strip parameters. It is primarily envisioned to utilize the setup for the qualification of micro-strip silicon sensors for the CMS outer tracker in the high-luminosity LHC upgrade. In this work, we present the details of this state-of-the-art characterization system and measurements performed on silicon strip sensors.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ITk Strip Module Design and Performance","authors":"M. Sykora","doi":"10.22323/1.348.0057","DOIUrl":"https://doi.org/10.22323/1.348.0057","url":null,"abstract":"The all-silicon ATLAS ITk Detector, vertexing and tracking device for the High-Luminosity LHC project, should operate at an ultimate peak instantaneous luminosity up to 7 . 5 × 10 34 cm − 2 s − 1 corresponding to approximately 200 inelastic proton-proton interactions per beam crossing. The ITk Strip Detector will consist of four barrel layers and six disks in a forward region on each side of the barrel. They will be composed of individual structures called staves and petals, whose production will require almost 18,000 single-sided strip modules of 8 different designs with the hybrid circuits carrying the front-end microelectronics ASICs glued to the sensor surface. The sensing elements are high resistivity n-in-p silicon strips capable of withstanding fluences up to 1 . 2 × 10 15 n eq /cm 2 . Both irradiated and non-irradiated prototypes of strip modules undergo testing procedures including test beam campaigns supplemented by laser and beta source tests to check if they meet the design requirements of the detector.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127205053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ATLAS Forward Proton DetectorsStatus and Plans","authors":"P. Erland","doi":"10.22323/1.348.0007","DOIUrl":"https://doi.org/10.22323/1.348.0007","url":null,"abstract":"Located at Large Hadron Collider (LHC), ATLAS experiment has been designed with the goal of measuring the products of proton--proton collisions. Although it has full azimuthal angle coverage and large acceptance in pseudorapidity, it is insufficient for some of interactions which can take place in interaction point. Such interactions are for example Central Exlusive Productions. It's product is a central system, which can be measured in ATLAS and two protons scattered at small angles into beam pipe beyond the reach of ATLAS. To fully measure such processes another detector is needed. Therefore ATLAS Forward Proton (AFP) detector was installed. \u0000 \u0000AFP consists of two stations on both sides of ATLAS, located further than 200 m from interaction point. It is practical to move out stations if they are no longer needed (e.g. in runs with special optics) that is why Roman Pot technology was used for installation allowing to move detectors horizontally. Each Roman Pot station is designed to house Silicon Tracker (SiT) and Time of Flight (ToF) detectors. SiT consists of 4 silicon sensor planes to determine proton kinematics by reconstructing it's trajectory from one station to the other. While ToF detector, created from of 16 L-shaped quartz bars, allows us to reduce pile-up by determining the primary vertex of the two protons by measuring the time of theirs arrival. \u0000 \u0000This talk is focusing on main features of AFP detector. Roman Pot technology will be explained as well as SiT and ToF structure. In addition performance of SiT planes will be presented and discussed.","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116105136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Operational experience of current vertex detector atthe LHCb experiment","authors":"D. Hutchcroft","doi":"10.22323/1.348.0004","DOIUrl":"https://doi.org/10.22323/1.348.0004","url":null,"abstract":"","PeriodicalId":267466,"journal":{"name":"Proceedings of The 27th International Workshop on Vertex Detectors — PoS(VERTEX2018)","volume":"193 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132570606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}