P. W. Phillips
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View article: First stave results towards mitigating sensor fracturing with interposers in the ATLAS ITk strips barrel
First stave results towards mitigating sensor fracturing with interposers in the ATLAS ITk strips barrel Open
At the conclusion of Run 3 of the Large Hadron Collider (LHC) at CERN, the accelerator complex will be upgraded to the High-Luminosity LHC (HL-LHC), allowing it to increase the dataset sizes of LHC experiments by about a factor of 20. This…
View article: Threshold bounce — occupancy-dependent modulation of the discriminating threshold in silicon detectors
Threshold bounce — occupancy-dependent modulation of the discriminating threshold in silicon detectors Open
The front-end electronics of silicon detectors are typically designed to ensure optimal noise performance for the expected input charge. A combination of preamplifiers and shaper circuits result in a nontrivial response of the front-end to…
View article: Electrical performances of pre-production staves for the ATLAS ITk Strip Detector Upgrade
Electrical performances of pre-production staves for the ATLAS ITk Strip Detector Upgrade Open
The ATLAS experiment is currently preparing for an upgrade of the inner tracking detector for the High-Luminosity LHC. The new tracker, ITk, employs an all-silicon detector with outer strip layers. The building block of the ITk strip barre…
View article: Search for new phenomena in three- or four-lepton events in $pp$ collisions at $\sqrt s$ =13 TeV with the ATLAS detector
Search for new phenomena in three- or four-lepton events in $pp$ collisions at $\sqrt s$ =13 TeV with the ATLAS detector Open
A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four charged leptons (3ℓ and 4ℓ, ℓ=e,μ) is presented. The analysis aims to be sensitive to a wide range of potential new-physics theo…
View article: Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector
Measurement of the $t\bar{t}t\bar{t}$ production cross section in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector Open
A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb$^{-1}$ is p…
View article: Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector
Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector Open
A technique is presented to measure the efficiency with which $c$-jets are mistagged as b-jets (mistagging efficiency) using $t\bar{t}$ events, where one of the $W$ bosons decays into an electron or muon and a neutrino and the other decays…
View article: DECAL: A Reconfigurable Monolithic Active Pixel Sensor for use in Calorimetry and Tracking
DECAL: A Reconfigurable Monolithic Active Pixel Sensor for use in Calorimetry and Tracking Open
In this paper we describe the DECAL Monolithic Active Pixel Sensor (MAPS) for digital electromagnetic calorimetry. The sensor consists of a matrix of 64x64 55um pixels, and provides a readout at 40MHz of the number of particles which have …
View article: ATLAS ITk Short-Strip Stave Prototypes with 130 nm Chipset
ATLAS ITk Short-Strip Stave Prototypes with 130 nm Chipset Open
The ATLAS ITk Collaboration is working to deliver a new Inner Tracking detector for use at HL-LHC. The strip tracker community has recently constructed a partially loaded, double-sided demonstrator stave using the HCC / ABC130 chipset in 1…
View article: Layout Overview and Developments for the upgrade of the Inner Tracker of the ATLAS experiment for the High-Luminosity LHC
Layout Overview and Developments for the upgrade of the Inner Tracker of the ATLAS experiment for the High-Luminosity LHC Open
In the high luminosity era of the Large Hadron Collider, the instantaneous luminosity is expected to reach unprecedented values, resulting in about 200 proton-proton interactions in a typical bunch crossing. To cope with the resultant incr…
View article: Prototype Strip Barrel Modules for the ATLAS ITk Strip Detector
Prototype Strip Barrel Modules for the ATLAS ITk Strip Detector Open
The module design for the Phase II Upgrade of the new ATLAS Inner Tracker (ITk) detector at the LHC employs integrated low mass assembly using single-sided flexible circuits with readout ASICs and a powering circuit incorporating control a…
View article: Lessons learned in high frequency data transmission design: ATLAS strips bus tape
Lessons learned in high frequency data transmission design: ATLAS strips bus tape Open
Requirements of HEP experiments lead to highly integrated systems with many electrical, mechanical and thermal constraints. A complex performance optimisation is therefore required. High speed data transmission lines are designed using cop…
View article: Investigations into the impact of bond pads and p-stop implants on the detection efficiency of silicon micro-strip sensors
Investigations into the impact of bond pads and p-stop implants on the detection efficiency of silicon micro-strip sensors Open
The High Luminosity Upgrade of the LHC will require the replacement of the Inner Detector of ATLAS with the Inner Tracker (ITk) in order to cope with higher radiation levels and higher track densities. Prototype silicon strip detector modu…
View article: Powering Schemes for Strip trackers
Powering Schemes for Strip trackers Open
Discussion of powering schemes for Upgrade Strip Trackers. Options for powering on module and on substructure electronics. Possibilities for cable reuse. Discussion of similarities with CMS.