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2019-09-11
14:38
Proton-Induced Radiation Effects in MAROC3, a full readout 0.35 µm SiGe ASIC
Reference: Poster-2019-704
Created: 2019. -1 p
Creator(s): Cojocariu, Lucian Nicolae

The MAROC chip was dedicated to MaPMT readout, and its third generation was backup solution in the front-end electronics of the RICH-LHCb Upgrade. Given the expected radiation environment for RICH, the MAROC3 was tested with 35 MeV proton beam at the Nuclear Physics Institute in Juelich, Germany. Investigated samples had the behavior recorded using a dedicated test bench. An increasing in power consumption followed by a rapid annealing - which proceeds at room temperature – was observed. The threshold for TID effects was found between 50 - 100 krad TID (Si), for a TID rate of about 30-170 rad/s.

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2019-09-11
14:36
Qualification of the final LHCb VELO electronics
Reference: Poster-2019-703
Created: 2019. -1 p
Creator(s): Lemos Cid, Edgar

The Vertex Locator of the LHCb will be upgraded in 2020. As the installation is approaching all the electronics have to be verified and tested. In this poster, the final test setup for all the components and the procedures accomplished will be described. Problems detected and solutions adopted will be explained. This process goes from visual inspection test of the different boards or bare Asic qualification to a full system test with the final components. The auxiliary boards and specificly designed firmware to properly facilitate the testing will be illustrated.

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2019-09-11
14:33
Back-end firmware for the LHCb VELO upgrade phase I
Reference: Poster-2019-702
Created: 2019. -1 p
Creator(s): Fernandez Prieto, Antonio

LHCb detector is a general purpose experiment instrumented in the forward region at the LHC, specialized in b- and c- physics, new physics and CP violation. The Vertex Locator (VELO) detector is being upgraded along with the rest of the tracking system and readout architecture during 2019-2020. The aim of this poster is to present the architecture of the control and readout firmware on the VELO specific back-end boards. Latest progress towards the installation and commissioning will be shown.

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2019-09-11
14:31
Radiation Hardness Tests Done on KINTEX-7 FPGA for High Energy Physics Experiments
Reference: Poster-2019-701
Created: 2019. -1 p
Creator(s): Placinta, Vlad-Mihai

The KINTEX-7 FPGA is to be used in the new digital readout of the upgraded LHCb-RICH sub-detectors. This summary presents the measurements done to evaluate the reliability of this FPGA under ionizing radiation exposure with different types of particle beams: ions, protons and X-rays. Single-event effect cross-sections for critical resources - such as Flip-Flops, RAM blocks, configuration memory, and I/O blocks - have been evaluated for multiple values of total ionizing dose, linear energy transfer, proton energy, and particle flux. A list of firmware constrains for this RICH application was deduced based on extrapolation to upgraded LHCb and 50 fb-1.

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2019-08-09
15:35
Flavour Physics at the High Luminosity LHC : LHCb Upgrade II
Reference: Poster-2019-700
Created: 2019. -1 p
Creator(s): Marin Benito, Carla

The LHCb Collaboration is planning an Upgrade II, a flavour physics experiment for the high luminosity era. This will be installed in LS4 (2030) and targets an instantaneous luminosity of 1.5 x10^34 cm-2 s-1, and an integrated luminosity of at least 300fb-1. Modest consolidation of the current experiment will also be introduced in LS3 (2025). Physics goals include probing new physics scenarios in lepton flavour universality, obtaining unprecedented precision on CKM tests, and expanding the LHCb programme into new measurement areas such as Higgs decays to charm. The detector design options include the introduction of timing information, with opportunities in vertexing and tracking, electromagnetic calorimetery, and hadron particle identification. Preliminary studies for the LHC suggest that the luminosity goals will be achievable. Following the issue of a physics case and accelerator note in 2018, the collaboration has been approved by the LHCC to proceed to the preparation of a TDR.

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2019-08-09
15:30
Latest LHCb measurements of semileptonic b-hadron decays
Reference: Poster-2019-699
Created: 2019. -1 p
Creator(s): Maccolini, Serena

Semileptonic b-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model of particle physics and for for searching for New Physics effects. The large branching fractions, coupled with excellent particle identification capability and accurate reconstruction of decay vertices, enable the LHCb experiment to perform high-precision measurements of many key quantities, such as CKM matrix elements, b-hadron properties, and Lepton Universality. In this contribution, recent results, essential for testing Lepton Universality and understanding hadronic effects, are presented.

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2019-07-17
08:54
Future upgrades at LHCb
Reference: Poster-2019-698
Created: 2019. -1 p
Creator(s): Denysenko, Vadym; Esen, Sevda

The LHCb Collaboration is planning an Upgrade II, a flavour physics experiment for the high luminosity era. This will be installed in LS4 (2030) and targets an instantaneous luminosity of 1.5 x10^34 cm-2 s-1, and an integrated luminosity of at least 300fb-1. Modest consolidation of the current experiment will also be introduced in LS3 (2025). Physics goals include probing new physics scenarios in lepton flavour universality, obtaining unprecedented precision on CKM tests, and expanding the LHCb programme into new measurement areas such as Higgs decays to charm. The detector design options include the introduction of timing information, with opportunities in vertexing and tracking, electromagnetic calorimetery, and hadron particle identification. Preliminary studies for the LHC suggest that the luminosity goals will be achievable. Following the issue of a physics case and accelerator note in 2018, the collaboration has been approved by the LHCC to proceed to the preparation of a TDR.

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2019-07-16
13:55
Particle identification performance of the LHCb experiment in Run 2
Reference: Poster-2019-697
Created: 2019. -1 p
Creator(s): Douglas, Lauren Marie; De Cian, Michel

The LHCb particle identification (PID) system is composed of two ring-imaging Cherenkov detectors, a series of muon chambers and a calorimeter system. A novel strategy has been introduced in Run 2, where the selection of PID calibration samples for charged particles and neutrals is implemented in the LHCb software trigger. A further processing of the data is required in order to provide samples for the determination of PID performance, which is achieved through a centralised production that makes highly efficient use of computing resources. This talk covers the major steps of the implementation, and highlights the PID performance achieved in Run 2.

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2019-07-16
10:51
Real-time alignment and temperature dependency of the LHCb Vertex Detector
Reference: Poster-2019-696
Created: 2019. -1 p
Creator(s): Mitreska, Biljana

The accuracy of the LHCb Vertex Locator (VELO) has ensured excellent detector performance, with a track reconstruction efficiency above 98%, and a vertex resolution along the beam axis of about 70 microns. The real-time alignment and calibration procedure developed by the LHCb experiment for Run 2 (2015-2018) for the full detector, including the VELO, provided extremely stable conditions during the full data taking period. In 2010, a significant shrinkage of the VELO modules was observed at the operating temperature of -30 degrees with respect to survey measurements made at ambient temperature. This has been confirmed by laboratory measurements on a single module. In a recent study, using a dedicated LHCb data sample taken over a range of VELO temperatures, the variation of the detector position as a function of temperature has been evaluated. An overview of the VELO alignment procedure and its performance during Run 2 will be presented, with an emphasis on the study of the temperature dependence.

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2019-06-27
14:45
LHCb - Recent results on the CKM angle $\gamma$ measurement at LHCb and prospect for Run III and Run IV
Reference: Poster-2019-695
Created: 2019. -1 p
Creator(s): Krupa, Wojciech

The CKM angle γ is the least precise measured parameter of the Unitary Triangle. Discrepancies between precise measurements of the CKM angle γ in the tree-level and loop dominated processes might provide evidence of New Physics - beyond the Standard Model. The value can be well determined by exploiting the interference between favored 𝐵 → 𝐷𝐾 decay). Selected results of the Cabibbo-Kobayashi-Maskawa (CKM) angle γ measurements, with special attention for 𝐵 → 𝐷𝐾 decays family, obtained at the LCHb will be discussed. A quick overview of the upgrade of the LHCb spectrometer and prospect for future measurements during Run III and Run IV at LHC will be also presented.

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Open Days 2013 Posters (58)