1,289 research outputs found

    Optimization of RPCs read-out panel with electromagnetic simulation

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    With the upgrade of the RPCs [1]-[2] and the increase of its performances, the study and the optimization of the read-out panel is necessary in order to maintain the signal integrity and to reduce the intrinsic crosstalk. Through Electromagnetic Simulation, performed with CST Studio Suite, new panels design are tested and their crosstalk property are studied. The behavior of different type of panel is shown, in particular a panel with the decoupling strip connected through their characteristic impedance to the ground plane is simulated

    Design and test of a 20 ps TDC for different applications

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    In this paper we will describe a new type of TDC that has a resolution of 20 ps. This device is realized in SiGe BiCMOS technology 0.13 μm. This technology was chosen since its structure guarantees more radiation hardness, less noise and high speed than silicon technology. A very accurate time resolution may find many applications in the high energy physics field or in medical physics

    Development of gaseous particle detectors based on semi-conductive electrode plates

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    A new kind of particle detector based on RPC-like structure was developed. Semi-conductive electrodes with resistivity ρ up to 108 Ω·cm have been used to improve the RPC rate capability. The aim is to obtain a detector with sub-nanosecond time resolution capable of working in a high-rate environment (rate capability of the order of MHz/cm2). In this paper the results on two different detector structures are presented: one with 1 mm gas gap and both SI(Semi-Insulating)- GaAs electrodes (ρ ∼ 108 Ω·cm), and the other characterized by 1.5 mm gas gap, one SI-GaAs electrode and one intrinsic silicon electrode (ρ ∼ 104 Ω · cm)

    Development of gaseous particle detectors based on semi-conductive plate electrodes

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    A new kind of particle detector based on a Resistive Plate Chamber structure is under development. Semi-conductive electrodes with resistivity up to 108 Ω cm are introduced to improve the Rate Capability performance. In this paper some results on the configurations under test are described. The DC Voltamperometric characterization of a SI-GaAs sample measured applying metal electrodes on the substrate is also reported

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W+μ+νW^+ \rightarrow \mu^+\nu and WμνW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector