Beam test measurements of Low Gain Avalanche Detector single pads and arrays for the ATLAS High Granularity Timing Detector

Allaire, C.; Trincaz-Duvoid, S.; Simion, S.; Marchiori, G.; Grabas, H. M. X.; Zhao, Y.; Lanni, F.; Wilder, M.; Masetti, L.; Spencer, E.; Benitez, J. F.; Lenzi, B.; Gkougkousis, E. L.; Calderini, G.; Nikolic-Audit, I.; Lacour, D.; Kastanas, A.; Seiden, A.; Galloway, Z.; Hidalgo, S.; Lange, J.; Falou, A. C.; Labitan, C.; Rummler, A.; Zatserklyaniy, A.; Gruey, B.; Luce, Z.; Makovec, N.; Bomben, M.; Quirion, D.; Freeman, P. M.; Pellegrini, G.; Merlos, A.; Correia, A. M. Henriques; Carulla, M.; Polifka, R.; Flores, D.; Guindon, S.; Cavallaro, E.; Zerwas, D.; McKinney-Martinez, F.; Sadrozinski, H. F-W.; Grinstein, S.; Serin, L.

doi:10.1088/1748-0221/13/06/p06017

Cited by 35 publications

(38 citation statements)

References 16 publications

(40 reference statements)

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“…To study the LGAD performance before and after irradiation, and the HGTD modules, the sensors have been exposed to charged-particle beams. The HGTD community performed the test beam in more than fifteen periods between 2016 and 2020 at the H6 beam line of the CERN SPS [11] with 40 to 120 GeV pions, at Fermilab with 120 GeV protons, at SLAC with 15 GeV electrons, and at DESY with 5 GeV electrons [12], [13]. In the next sections, we will present the experimental setup using by the DESY laboratory as a model, and the test beam results for different laboratories.…”

Section: Test Beam Campaignsmentioning

confidence: 99%

A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system: detector concept, description and R&D and beam test results

Imam

2021

EPJ Web Conf.

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The particle flux increase (pile-up) at the HL-LHC with luminosities of L = 7.5 × 1034 cm−2 s−1 will have a significant impact on the reconstruction of the ATLAS detector and on the performance of the trigger. The forward region and the end-cap where the internal tracker has poorer longitudinal track impact parameter resolution, and where the liquid argon calorimeter has coarser granularity, will be significantly affected. A High Granularity Time Detector (HGTD) is proposed to be installed in front of the LAr end-cap calorimeter for the mitigation of the pileup effect, as well as measurement of luminosity. It will have coverage of 2.4 to 4.0 from the pseudo-rapidity range. Two dual-sided silicon sensor layers will provide accurate timing information for minimum-ionizing particles with a resolution better than 30 ps per track (before irradiation), for assigning each particle to the correct vertex. The readout cells are about 1.3 mm × 1.3 mm in size, which leads to a high granular detector with 3 million channels. The technology of low-gain avalanche detectors (LGAD) with sufficient gain was chosen to achieve the required high signal-to-noise ratio. A dedicated ASIC is under development with some prototypes already submitted and evaluated. The requirements and general specifications of the HGTD will be maintained and discussed. R&D campaigns on the LGAD are carried out to study the sensors, the related ASICs and the radiation hardness. Both laboratory and test beam results will be presented.

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Section: Test Beam Campaignsmentioning

confidence: 99%

A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system: detector concept, description and R&D and beam test results

Imam

2021

EPJ Web Conf.

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“…Recently, some precision timing detectors are proposed to be installed at CMS [49], AT-LAS [50,51] and LHCb [52]. These timing detectors, which aim to reduce the pile-up rate at the high luminosity LHC (HL-LHC), can also be used in long-lived particle searches [53][54][55][56].…”

Section: Timing Detectormentioning

confidence: 99%

“…To mitigate the high pile-up background at the HL-LHC, various precision timing detectors will be installed at CMS [20], ATLAS [21,78,79], and LHCb [22], which can be used for LLP searches [29,31,38,43,46,51,80].…”

Section: Precision Timing Detectorsmentioning

confidence: 99%

Enhanced long-lived dark photon signals at the LHC

Liu

Tran

2020

J. High Energ. Phys.

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We construct a model in which the standard model is extended by a hidden sector with two gauge U(1) bosons. A Dirac fermion ψ charged under both U(1) fields is introduced in the hidden sector which can be a subcomponent of the dark matter in the Universe. Stueckelberg mass terms between the two new gauge U(1) fields and the hypercharge gauge boson mediate the interactions between the standard model sector and the hidden sector. A remarkable collider signature of this model is the enhanced long-lived dark photon events at the LHC than the conventional dark photon models; the long-lived dark photons in the model can be discriminated from the background by measuring the time delay signal in the precision timing detectors which are proposed to be installed in the LHC upgrades and have an O(10) pico-second detection efficiency. Searches with current LHCb data are also investigated. Various experimental constraints on the model including collider constraints and cosmological constraints are also discussed.

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“…[29], focusing on the time-delay feature of the LLP decay products, which arises mainly from the nonrelativistic speed of not-so-light LLPs. Precision timing upgrades have been proposed at various LHC experiments, including ATLAS [30,31], CMS [32], and LHCb [33]. In particular, the future MIP (minimum ionizing particle) timing detector (MTD) at the CMS experiment is expected to have a time resolution of 30 picoseconds (ps) for charged particles in the high-luminosity LHC (HL-LHC) era, and we will focus on this setup in this study.…”

Section: Introductionmentioning

confidence: 99%

Time-delayed electrons from neutral currents at the LHC

Cheung

Wang

2021

J. High Energ. Phys.

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We investigate long-lived particles (LLPs) produced in pair from neutral currents and decaying into a displaced electron plus two jets at the LHC, utilizing the proposed minimum ionizing particle timing detector at CMS. We study two benchmark models: the R-parity-violating supersymmetry with the lightest neutralinos being the lightest supersymmetric particle and two different U(1) extensions of the standard model with heavy neutral leptons (HNLs). The light neutralinos are produced from the standard model Z-boson decays via small Higgsino components, and the HNLs arise from decays of a heavy gauge boson, Z′. By simulating the signal processes at the HL-LHC with the center-of-mass energy $$ \sqrt{s} $$ s = 14 TeV and integrated luminosity of 3 ab−1, our analyses indicate that the search strategy based on a timing trigger and the final state kinematics has the potential to probe the parameter space that is complementary to other traditional LLP search strategies such as those based on the displaced vertex.

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Beam test measurements of Low Gain Avalanche Detector single pads and arrays for the ATLAS High Granularity Timing Detector

Cited by 35 publications

References 16 publications

A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system: detector concept, description and R&D and beam test results

A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system: detector concept, description and R&D and beam test results

Enhanced long-lived dark photon signals at the LHC

Time-delayed electrons from neutral currents at the LHC

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