| 1. |
- Milstead, David A., et al.
(författare)
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Modelling radiation damage to pixel sensors in the ATLAS detector
- 2019
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Ingår i: Journal of Instrumentation. - : IOP PUBLISHING LTD. - 1748-0221. ; 14:6
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Tidskriftsartikel (refereegranskat)abstract
- Silicon pixel detectors are at the core of the current and planned upgrade of the ATLAS experiment at the LHC. Given their close proximity to the interaction point, these detectors will be exposed to an unprecedented amount of radiation over their lifetime. The current pixel detector will receive damage from non-ionizing radiation in excess of 1015 1 MeV neq/cm2, while the pixel detector designed for the high-luminosity LHC must cope with an order of magnitude larger fluence. This paper presents a digitization model incorporating effects of radiation damage to the pixel sensors. The model is described in detail and predictions for the charge collection efficiency and Lorentz angle are compared with collision data collected between 2015 and 2017 (≤ 10 1 MeV neq/cm2). © 2019 CERN for the benefit of the ATLAS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
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| 2. |
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| 3. |
- Dunne, Katherine
(författare)
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Design of the HIBEAM/NNBAR Calorimeter and Upgrades to the ATLAS Tile Calorimeter Readout Electronics
- 2023
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The Standard Model has been greatly successful in predicting the laws that govern our universe. Yet there are still seemingly missing pieces to the model. Detector development plays a crucial role in advancing our understanding of particle physics and helps answer some of the most pressing questions in the field, such as the nature of dark matter and why a matter-antimatter asymmetry is observed. This thesis has covered the work of developing detectors for two different experiments.The HIBEAM/NNBAR experimental program will be a search after neutron-sterile neutron and neutron-antineutron oscillations housed in the the European Spallation Source (ESS) in Lund, Sweden. The experiment will reach unprecedented sensitivity for free-neutron searches, surpassing the last the oscillation time limit by 3 orders of magnitude. This thesis presents an overview of the experimental goals and the opportunities afforded by the ESS infrastructure. The primary work for this thesis has been the design, simulation and construction of a prototype calorimeter for NNBAR stage of the experiment, which is presented here.The ATLAS experiment is currently undergoing upgrades to meet the requirements of the high-luminosity, high-radiation environment at the HL-LHC. This thesis provides an overview of the LHC and the ATLAS experiment, with special focus on the hadronic Tile calorimeter. TileCal will be upgraded to provide full granularity data at the lowest trigger level of the upgraded ATLAS trigger and data acquisition system. The work presented here focuses on TileCal upgrades to Daughterboard (DB), the interlink board responsible for the management of on- and off-detector data transmission. This work has been primarily focused on the design and fabrication of two printed circuit boards to test the implementation of a commercial, radiation-hardened FPGA in the upgraded DB design. The FPGA will control access to remote control JTAG in the DB Xilinx FPGA interface.
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| 4. |
- Aad, G., et al.
(författare)
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- 2014
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Ingår i: Journal of High Energy Physics. - 1029-8479 .- 1126-6708. ; :5, s. 1-52
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Tidskriftsartikel (refereegranskat)
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| 5. |
- Aad, G., et al.
(författare)
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- 2014
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Ingår i: Journal of High Energy Physics. - 1029-8479 .- 1126-6708. ; :9, s. 1-61
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Aad, G, et al.
(författare)
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- 2014
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Ingår i: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 113:17
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Abulaiti, Yiming, et al.
(författare)
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Technical Design Report for the Phase-II Upgrade of the ATLAS Tile Calorimeter
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This Technical Design Report describes the project to upgrade the ATLAS Tile Calorimeter for the operation at the High Luminosity LHC. The High Luminosity LHC is planned to begin operation in 2026 and to deliver more than ten times the integrated luminosity (up to 4000 fb"^{-1}" of the LHC Runs 1-3 combined. To achieve this integrated luminosity in a reasonable amount of time, an instantaneous luminosity of up to "7.5\times 10^{34} cm^{-2}s^{-1}" is required, corresponding to up to 200 simultaneous pp interactions per bunch crossing. The large luminosity offers the opportunity for a wealth of physics measurements but presents significant challenges to the detector as well as to the trigger and data acquisition systems in the form of increased trigger rates and detector occupancy. This document summarises the requirements and motivations for the Tile Calorimeter upgrade and gives a detailed technical description of the different components. It describes the beam tests with the prototypes in recent years and the plans for the assembly, quality assurance and the integration of the final system. The document also presents the key aspects of project management with an overview of the organisation, the schedule and the cost.
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| 8. |
- Milstead, David A., et al.
(författare)
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Study of the material of the ATLAS inner detector for Run 2 of the LHC
- 2017
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Ingår i: Journal of Instrumentation. - : Institute of Physics (IOP). - 1748-0221. ; 12:12
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Tidskriftsartikel (refereegranskat)abstract
- The ATLAS inner detector comprises three different sub-detectors: the pixel detector, the silicon strip tracker, and the transition-radiation drift-tube tracker. The Insertable B-Layer, a new innermost pixel layer, was installed during the shutdown period in 2014, together with modifications to the layout of the cables and support structures of the existing pixel detector. The material in the inner detector is studied with several methods, using a low-luminosity s=13 TeV pp collision sample corresponding to around 2.0 nb-1 collected in 2015 with the ATLAS experiment at the LHC. In this paper, the material within the innermost barrel region is studied using reconstructed hadronic interaction and photon conversion vertices. For the forward rapidity region, the material is probed by a measurement of the efficiency with which single tracks reconstructed from pixel detector hits alone can be extended with hits on the track in the strip layers. The results of these studies have been taken into account in an improved description of the material in the ATLAS inner detector simulation, resulting in a reduction in the uncertainties associated with the charged-particle reconstruction efficiency determined from simulation. © 2017 CERN.
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| 9. |
- Aad, G., et al.
(författare)
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- 2015
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Tidskriftsartikel (refereegranskat)
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| 10. |
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