BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:The phase-1 upgrade of the ATLAS level-1 calorimeter trigger DTSTART;VALUE=DATE-TIME:20230905T104000Z DTEND;VALUE=DATE-TIME:20230905T110000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-2898@indico.tlabs.ac.za DESCRIPTION:Speakers: Emily Anne Smith (CERN)\nThe ATLAS level-1 calorimet er trigger is a custom-built hardware system\nthat identifies events conta ining calorimeter-based physics objects\,\nincluding electrons\, photons\, taus\, jets\, and missing transverse energy.\nIn Run 3\, L1Calo has been upgraded to process higher granularity\ninput data. The new trigger\, cur rently running in parallel with the \nlegacy system\, comprises several FP GA-based feature extractor modules\, \nwhich process the new digital infor mation from the calorimeters and \nexecute more sophisticated trigger algo rithms. The design of the \nsystem will be presented along with an analys is of the improved \nperformance of the upgrade in the increasingly challe nging Run-3 \nLHC pile-up environment.\n\nhttps://indico.tlabs.ac.za/event /112/contributions/2898/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/2898/ END:VEVENT BEGIN:VEVENT SUMMARY:The CMS tracker performance in Run3 DTSTART;VALUE=DATE-TIME:20230905T094000Z DTEND;VALUE=DATE-TIME:20230905T100000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-3203@indico.tlabs.ac.za DESCRIPTION:Speakers: Tomas Kello (INFN Florence)\nThe inner tracker of CM S is the largest silicon tracker ever built with 1856 pixel and 15148 stri p detector modules that provide accurate track reconstruction. To achieve high precision in measurements of the momenta of charged particles\, corre ctions for the position\, rotation and curvature of these modules must be found\; such a procedure is known as tracker alignment. Magnet cycles\, te mperature variations and ageing of modules cause significant time variatio ns that affect the track reconstruction and therefore necessitate continuo us alignment throughout the operation of the LHC machine. Special challeng es must be addressed in the Run 3 data-taking period as the high instantan eous luminosity and the newly installed layer 1 of the barrel pixel lead t o fast changes in the irradiation of modules.\n\nIn this presentation\, th e performance of tracker alignment on Run 3 data will be presented\, highl ighting new features developed for the Run 3 data taking period. The impac t of the tracker alignment on physics performance will also be reviewed.\n \nhttps://indico.tlabs.ac.za/event/112/contributions/3203/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/3203/ END:VEVENT BEGIN:VEVENT SUMMARY:Early Performance of the Scintillating Fibre Tracker for the LHCb Upgrade DTSTART;VALUE=DATE-TIME:20230905T102000Z DTEND;VALUE=DATE-TIME:20230905T104000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-2954@indico.tlabs.ac.za DESCRIPTION:Speakers: Jan de Boer (Nikhef national institute of subatomic physics (NL))\nLHCb has undergone a major upgrade during LHC LS2 (2019-202 2) to cope with increased instantaneous luminosities and a 40 MHz read-out with a full software-based trigger and real-time analysis to improve on m any world-best physics measurements. A light and homogeneous tracking dete ctor based on plastic scintillating fibres has been installed downstream o f the LHCb dipole magnet. \nThe Scintillating Fibre (SciFi) tracker covers an area of 340 m2 by using more than 10\,000 km of blue emitting scintill ating fibre with 250 μm diameter\, enabling a spatial resolution of bette r than 80 μm for charged particles and a hit efficency better than 99%. S ix-layer fibre mats of 2.4 m length are assembled to form individual detec tor modules (0.5 m x 4.8 m) consisting of eight fibre mats each. Linear ar rays of Silicon Photomultipliers cooled to -40 °C are placed at the fibre ends. The readout of 524k channels occurs through custom-designed front-e nd electronics with fast 10 ns shaping\, dual integrators\, and a 3-compar ator flash ADC to digitise the signals. An FPGA clusters the signals over threshold and outputs a barycentre to the 40 MHz DAQ farm with a total ban dwidth of over 20 Tbits/sec. \nAt the time of the conference\, the commiss ioning will be complete with measurements of the early performance of the detector in 2022 and 2023. The presentation will include the first results of the SciFi detector performance as well as results from SiPM irradiatio ns studies.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2954/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/2954/ END:VEVENT BEGIN:VEVENT SUMMARY:The operational experience and performance of the ATLAS SCT during Run-2 and LS2\, and the first impression from Run3 operations DTSTART;VALUE=DATE-TIME:20230905T100000Z DTEND;VALUE=DATE-TIME:20230905T102000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-2964@indico.tlabs.ac.za DESCRIPTION:Speakers: Alessandro Guida (CERN)\nThe ATLAS SemiConductor Tr acker (SCT) restarted operations in LHC Run-3. The SCT successfully opera ted in LHC Run-2 (2015-2018) which came with high instantaneous luminosity and pileup conditions that were far in excess of what the SCT was origina lly designed tomeet. The first significant effects of radiation damage in the SCT were alsoobserved during Run-2. The operation condition of SCT fro m LHC Run-3 isexpected to be the same as those in Run-2. This talk will su mmarise the\noperational experience\, challenges and performance of the SC T during Run-2 and LS2\, and the first impression from Run3 operations. Al so the observation and prospect of the radiation damage on SCT silicon str ip sensors will be presented.\n\nhttps://indico.tlabs.ac.za/event/112/cont ributions/2964/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/2964/ END:VEVENT BEGIN:VEVENT SUMMARY:Operational Experience and Performance with the ATLAS Pixel detect or at the Large Hadron Collider at CERN DTSTART;VALUE=DATE-TIME:20230905T090000Z DTEND;VALUE=DATE-TIME:20230905T092000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-2986@indico.tlabs.ac.za DESCRIPTION:Speakers: Vinicius Franco Lima (CERN)\nThe tracking performanc e of the ATLAS detector relies critically on its 4-layer Pixel Detector. A s the closest detector component to the interaction point\, this detector is subjected to a significant amount of radiation over its lifetime. At th e start of the LHC proton-proton collision RUN3 in 2022\, the innermost la yer IBL\, consisting of planar and 3D pixel sensors\, had received an inte grated fluence of approximately Φ = 1 × 10**15 \n1 MeV neq/cm2.\nThe ATL AS collaboration is continually evaluating the impact of radiation on the Pixel Detector..\nIn this talk the key status and performance metrics of t he ATLAS Pixel Detector are\nsummarised\, and the operational experience a nd requirements to ensure optimum data quality and data taking efficiency will be described\, with special emphasis to radiation damage experience. A quantitative analysis of charge collection\, dE/dX\, occupancy reduction with integrated luminosity\, under-depletion effects\, effects of anneali ng will be presented and discussed\, as well as the operational issues and mitigation techniques adopted for the LHC Run3.\n\nhttps://indico.tlabs.a c.za/event/112/contributions/2986/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/2986/ END:VEVENT BEGIN:VEVENT SUMMARY:The LHCb VELO detector: design\, operation and first results DTSTART;VALUE=DATE-TIME:20230905T092000Z DTEND;VALUE=DATE-TIME:20230905T094000Z DTSTAMP;VALUE=DATE-TIME:20260612T045950Z UID:indico-contribution-508-2968@indico.tlabs.ac.za DESCRIPTION:Speakers: Edgar Lemos Cid (CERN)\nThe LHCb experiment has been upgraded during the second long shutdown\nof the Large Hadron Collider at CERN\, and the new detector is currently\noperating at the LHC. The Verte x Locator (VELO) is the detector\nsurrounding the interaction region of th e LHCb experiment\, responsible of\nreconstructing the proton-proton colli sion (primary vertices) as well as\nthe decay vertices of long-lived parti cles (secondary vertices).\nThe VELO is composed by 52 modules with hybrid pixel detector technology\,\noperating at just 5.1 mm from the beams. The sensors consist of\n200 $\\mu$m thick n-on-p planar silicon sensors\, rea d out via 3 VeloPix ASICs.\nThe sensors are attached to a 500 $\\mu$m thic k silicon plate\, which embeds\n19 micro-channels for the circulation of t he CO$_2$ evaporative cooling.\nThe VELO operates in an extreme environmen t\, which poses significant challenges\nto its operation. During the lifet ime of the detector\, the sensors are foreseen\nto accumulate an integrate d fluence of up to $8\\times10^{15}$ 1MeV n$_{\\rm eq}$cm$^{-2}$\,\nroughl y equivalent to a dose of 400 MRad. Moreover\, due to the geometry\nof the detector\, the sensors will face a highly non-uniform irradiation\,\nwith fluences in the hottest regions expected to vary by a factor 400 within t he same sensor.\nThe highest occupancy ASICs foresee a maximum pixel hit r ate of 900 Mhit/s and an output\ndata rate exceeding 15 Gbit/s. The design \, operation and early results obtained during\nthe first year of commissi oning will be presented.\n\nhttps://indico.tlabs.ac.za/event/112/contribut ions/2968/ LOCATION: Auditorium 2 URL:https://indico.tlabs.ac.za/event/112/contributions/2968/ END:VEVENT END:VCALENDAR