716 research outputs found
High-performance HV-CMOS sensors for future particle physics experiments — an overview
No full textHV-CMOS (High Voltage-CMOS) sensors are emerging as a prime candidate for
future tracking detectors that have extreme requirements on material budget, pixel granularity, time
resolution and radiation tolerance. These sensors have the advantages of full monolithic structure,
low manufacture cost, fast charge collection and high radiation tolerance. Confirmed and potential
tracking applications in physics experiments include the Mu3e experiment, proton EDM searches,
future upgrades of LHC (Large Hadron Collider) and CEPC (Circular Electron Positron Collider).
The HV-CMOS group at Liverpool is doing generic R & D to push the boundaries of HV-CMOS
sensors performance, especially in terms of single point resolution, fast-timing capability and
radiation tolerance. This contribution gives an overview of the latest research by the Liverpool
HV-CMOS group and presents the HV-CMOS prototypes developed in Liverpool
E-TCT characterization of a thinned, backside biased, irradiated HV-CMOS pixel test structure
No full textThis paper presents the results of edge-Transient Current Technique (e-TCT) measurements of a test structure of a High Voltage CMOS (HV-CMOS) pixel demonstrator, the H35DEMO. Several high resistivity (1000 Ω⋅cm) samples of the device were thinned to 100μm, processed for backside biasing, and irradiated with neutrons to fluences up to 2⋅1016neq⋅cm−2. The evolution of effective doping concentration with respect to fluence is studied. Samples irradiated to a fluence of 5⋅1014neq⋅cm−2 are fully depleted beyond −50V substrate bias voltage while samples irradiated to the highest fluence reach 30 μm depletion at −200V
High-performance HV-CMOS sensors for future particle physics experiments — an overview
No full textHV-CMOS (High Voltage-CMOS) sensors are emerging as a prime candidate for future tracking detectors that have extreme requirements on material budget, pixel granularity, time resolution and radiation tolerance. These sensors have the advantages of full monolithic structure, low manufacture cost, fast charge collection and high radiation tolerance. Confirmed and potential tracking applications in physics experiments include the Mu3e experiment, proton EDM searches, future upgrades of LHC (Large Hadron Collider) and CEPC (Circular Electron Positron Collider). The HV-CMOS group at Liverpool is doing generic R&D to push the boundaries of HV-CMOS sensors performance, especially in terms of single point resolution, fast-timing capability and radiation tolerance. This contribution gives an overview of the latest research by the Liverpool HV-CMOS group and presents the HV-CMOS prototypes developed in Liverpool
First results on the ATLAS HL-LHC H35DEMO prototype
No full textThis article presents the first measured results from the H35DEMO pixel demonstrator.
The H35DEMO is a prototype ASIC in the 0.35 m High Voltage-CMOS (HV-CMOS) process
from ams aimed at proving that HV-CMOS sensor technologies are suitable as tracking detectors
for the ATLAS High Luminosity-LHC (HL-LHC) upgrade. The prototype was fabricated in an
engineering run, in which wafers with four different substrate resistivities, ranging from the standard
value of 20
 cm to a high value of 1 k
 cm, were used to increase the depletion region of the
sensor. The prototype includes four large area matrices and a few test structures. New experimental
set-ups have been developed to measure the ASIC with radioactive sources and laser beams. The
experimental set-ups and the measured results obtained will be discussed in this article
Development of RD50-MPW2: a high-speed monolithic HV-CMOS prototype chip within the CERN-RD50 collaboration
No full textThe CERN-RD50 collaboration has ongoing research to further develop monolithic High Voltage-CMOS (HV-CMOS) sensors in a 150 nm process for future particle physics experiments. As a part of this research programme, a test chip (RD50-MPW2) that implements new methodologies for low leakage current and fast and low-noise readout circuitry has been designed and submitted for fabrication. This article presents the design details and simulation results of the 8 × 8 matrix of high-speed monolithic HV-CMOS pixels included in RD50-MPW2, in which two flavours of fast pixels are implemented: a conventional continuous-reset pixel and a switched-reset pixel with a novel asynchronous switched-reset scheme
Development of a software framework to assess the potential of adaptive trailing edge flaps on horizontal-axis wind turbines
No full textEuropean Wind Energy Masters (EWEM) | Rotor Design Trac
Postmortem and photography: the meaning of relationship between death and imagery in a contemporary hyperreal media landscape
No full textMankind is deeply affected by the reality of death, which has found its way into imagery. With the invention of photography during the 19th-century, imagery and death have gained a new intimacy that changed the truthfulness of the photograph and way people remembered others and interact with death, something that borders on the uncanny. Imagery and remembering moved from the mourning portrait to postmortem photography, where Photoshop, social media-platforms, and the phenomenon of the deep-fake video are typical for congregating with death.
In the 20th-century, and before these recent changes, theorist Roland Barthes had examined the relationship between death and photography, and sociologist Jean Baudrillard wrote on rapid media developments fading reality and creating a postmodern hyperreality where the original is lost. These theories, along with Sigmund Freud’s theory on the feeling of Uncanny, applied to current case studies of photography, Photoshop, and death, will examine how photographic practices relate to death in past and contemporary society, their meanings, and what possible causes they may serve to people in this postmodern society
EARLY STANDARD MODEL MEASUREMENTS WITH ATLAS
No full textWe present prospects to perform early measurements of the production cross-section of the electroweak bosons and of top pairs with the ATLAS detector at LHC. An accurate determination of these cross-sections provide a valuable test of the Standard Model. The W and Z analyses exploit the leptonic decays in electrons and muons; the top pair production is studied using final states in which one or both top quark decay semileptonically. Given the high production cross-section at 14 TeV of electroweak bosons and of top quark pairs and the high luminosity of the LHC accelerator, these particles are expected to be produced abundantly. This fact together with the rather distinct event topology makes these measurements possible already after that few tenths of inverse picobarn of luminosity are recorded. For this reason emphasis will be given to data-driven methods used to extract trigger and lepton reconstruction efficiencies and to reject backgrounds. For the same reason, in the top pair production study, when only one of the top quark decays semileptonically we perform the cross-section measurement with and without relying on the tagging of b-quark initiated jets
Overview of Higgs results from the ATLAS experiment
No full textOverview of Higgs results from the ATLAS experiment to be presented at the 21st International Conference on SuperSymmetry and Unification of Fundamental Interactions August 26th- 31st, 2013
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