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Upgrade of Tile Calorimeter of the ATLAS Detector for the High Luminosity LHC.
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0001-9931-2896
2017 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 928, article id 012024Article in journal (Refereed) Published
Abstract [en]

The Tile Calorimeter (TileCal) is the hadronic calorimeter of ATLAS covering the central region of the ATLAS experiment. TileCal is a sampling calorimeter with steel as absorber and scintillators as active medium. The scintillators are read out by wavelength shifting fibers coupled to photomultiplier tubes (PMT). The analogue signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The High Luminosity Large Hadron Collider (HL-LHC) will have a peak luminosity of 5 × 1034 cm −2 s −1, five times higher than the design luminosity of the LHC. TileCal will undergo a major replacement of its on- and off-detector electronics for the high luminosity programme of the LHC in 2026. The calorimeter signals will be digitized and sent directly to the off-detector electronics, where the signals are reconstructed and shipped to the first level of trigger at a rate of 40 MHz. This will provide a better precision of the calorimeter signals used by the trigger system and will allow the development of more complex trigger algorithms. Three different options are presently being investigated for the front-end electronic upgrade. Extensive test beam studies will determine which option will be selected. Field Programmable Gate Arrays (FPGAs) are extensively used for the logic functions of the off- and on-detector electronics. One hybrid demonstrator prototype module with the new calorimeter module electronics, but still compatible with the present system, may be inserted in ATLAS at the end of 2016.

Place, publisher, year, edition, pages
2017. Vol. 928, article id 012024
Keywords [en]
ATLAS, Tile Calorimeter, TileCal, HL-LHC, Demonstrator, Upgrade, High Luminosity, Radiation Tolerant
National Category
Accelerator Physics and Instrumentation
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-175224DOI: 10.1088/1742-6596/928/1/012024OAI: oai:DiVA.org:su-175224DiVA, id: diva2:1361434
Conference
17th International Conference on Calorimetry in Particle Physics (CALOR2016), Daegu, South Korea, 15-20 May, 2016
Projects
HL-LHC ATLAS Tile Calorimeter Upgrade
Note

On behalf of the ATLAS Tile Calorimeter System.

Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-10-23Bibliographically approved
In thesis
1. Development of the read-out link and control board for the ATLAS Tile Calorimeter Upgrade
Open this publication in new window or tab >>Development of the read-out link and control board for the ATLAS Tile Calorimeter Upgrade
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Phase-II upgrade plan for the ATLAS Hadronic Tile Calorimeter facing the High-Luminosity LHC (HL-LHC) era includes approximately 1000 radiation tolerant read-out link and control boards (Daughterboards) that will provide full-granularity digital data to a fully-digital trigger system off-detector through multi-Gbps optic fibres. Different Daughterboard (DB) revisions have been developed, each successively aiming to meet the demanding HL-LHC requirements. The DB communicates with the off-detector systems via four 9.6 Gbps uplinks and two 4.8 Gbps downlinks. The DB performs high-speed read-out of digitized Photomultiplier (PMT) samples, while receiving and distributing configuration, control and LHC-synchronous timing to the front-end system. The design aims to minimize radiation-induced errors and enhance data reliability by embracing a fully double redundant design using CERN radiation hard GBTx ASICs and Xilinx FPGAs, implementing Triple Mode Redundancy (TMR), adopting Soft Error Mitigation (SEM) to correct for configuration memory Single Event Upsets (SEU), and employing Cyclic Redundancy Check (CRC) and Forward Error Correction (FEC) in the data format of the uplink and downlink, respectively. Total Ionizing Dose (TID), Non-Ionizing Energy Losses (NIEL) and Single Event Effects (SEE) radiation tests have been performed in order to assess the radiation tolerance strategies followed in the design and to qualify the DB for the HL-LHC requirements according to the ATLAS policy on radiation tolerant electronics. This thesis presents the author's contribution to the development of the DB through the different revisions, the integration of the DB to the Demonstrator and the radiation tests performed aiming to demonstrate the readiness of the DB to withstand the radiation requirements imposed by the HL-LHC. Resulting of this document, the author proposes strategies to be used in the new DB design moving forward the final design to be produced and inserted in ATLAS during the 2024-2026 period.

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2019. p. 97
Keywords
HL-LHC, ATLAS, Tile Calorimeter, TileCal, Demonstrator, Daughterboard, Read-out, Digital electronics, Data acquisition, Radiation tolerant, GBTx, TID, NIEL, SEU, SEL, FPGA, Kintex 7, Ultrascale, Ultrascale+, Optic Links
National Category
Accelerator Physics and Instrumentation
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-175246 (URN)978-91-7797-895-4 (ISBN)978-91-7797-896-1 (ISBN)
Public defence
2019-12-10, sal FB54, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 09:00 (English)
Opponent
Supervisors
Available from: 2019-11-15 Created: 2019-10-22 Last updated: 2019-11-12Bibliographically approved

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