A5105654573- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- CCD and CMOS Imaging Sensors
- Radiation Effects in Electronics
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Distributed and Parallel Computing Systems
- Parallel Computing and Optimization Techniques
- Calibration and Measurement Techniques
- Particle accelerators and beam dynamics
- Analog and Mixed-Signal Circuit Design
- Advanced Data Storage Technologies
- Electromagnetic Scattering and Analysis
- Analytical Chemistry and Sensors
- Scientific Research and Discoveries
- Advanced Semiconductor Detectors and Materials
- Experimental Learning in Engineering
- bioluminescence and chemiluminescence research
- Advanced X-ray Imaging Techniques
- Biosensors and Analytical Detection
- Solar and Space Plasma Dynamics
University College London
2015-2024
TRIUMF
2024
University of Chinese Academy of Sciences
2024
University of Toronto
2024
University of Liverpool
2018-2020
European Organization for Nuclear Research
2018-2020
University of Glasgow
2018
University of Oxford
2016
UCL Australia
2013-2016
Deutsches Elektronen-Synchrotron DESY
2016
An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members the CALICE Collaboration. The AHCAL consists a 38-layer sandwich structure steel plates and highly-segmented scintillator tiles that are read out wavelength-shifting fibers coupled to SiPMs. signal is amplified shaped with custom-designed ASIC. A calibration/monitoring system based on LED light was developed monitor SiPM gain measure full response curve in order correct...
We present the FP420 R&D project, which has been studying key aspects of development and installation a silicon tracker fast-timing detectors in LHC tunnel at 420 m from interaction points ATLAS CMS experiments. These would measure precisely very forward protons conjunction with corresponding central as means to study Standard Model (SM) physics, search for characterise new physics signals. This report includes detailed description case detector and, particular, measurement Central Exclusive...
Charge collection properties of particle detectors made in HV-CMOS technology were investigated before and after irradiation with reactor neutrons. Two different sensor types designed processed 180 350 nm by AMS. Edge-TCT charge measurements electrons from 90Sr source employed. Diffusion generated carriers undepleted substrate contributes significantly to the irradiation, while drift contribution prevails as shown at shaping times. The depleted region a given bias voltage was found grow...
A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams energy range 8 to 80 GeV. The analysis described here focuses on interactions of pions calorimeter. One main objectives CALICE program is validate Monte Carlo tools available design a full-sized detector. Si-W are therefore confronted predictions various physical models implemented GEANT4simulation framework.
The technique of invariant mass spectroscopy has been used to measure, for the first time, ground state energy neutron-unbound 28F, determined be a resonance in 27F+n continuum at 22–0(5–0) keV. States 28F were populated by reactions 62 MeV/u 29Ne beam impinging on 288 mg/cm2 beryllium target. measured is good agreement with USDA/USDB shell model predictions, indicating that pf intruder configurations play only small role structure and establishing low-Z boundary island inversion N=19...
The SemiConductor Tracker (SCT) data acquisition (DAQ) system will calibrate, configure, and control the approximately six million front-end channels of ATLAS silicon strip detector. It provide a synchronized bunch-crossing clock to modules, communicate first-level triggers chips, transfer information about hit strips high-level trigger system. has been used extensively for calibration quality assurance during SCT barrel endcap assembly performance confirmation tests after transport barrels...
A detailed description of the integration structures for barrel region silicon strips tracker ATLAS Phase-II upgrade Large Hadron Collider, so-called High Luminosity LHC (HL-LHC), is presented. This paper focuses on one latest demonstrator prototypes recently assembled, with numerous unique features. It consists a shortened, shield-less, and double sided stave, two candidate power distributions implemented. Thermal electrical performances prototype are presented, as well assembly procedures tools.
The development of the Clock and Control (CC) hardware firmware for EuXFEL DAQ system is presented. exploits data handling advances provided by new telecommunication architecture standard physics. CC responsible synchronising to overall timing. consists a DESY designed MTCA.4 board UCL Rear Transition Module (RTM). Each RTM controls up 16 Front End Modules (FEMs) 1 Megapixel 2D detector. provide extendibility scalability support future upgrades or larger detectors.
Abstract We present the development of front end amplifier circuit for ABCStar readout ASIC designed upgraded ATLAS Inner Tracker (ITk) detector. The is intended to work with silicon strip sensors moderate length between 1.9 cm and 5.5 dependent on position in final implemented a commercial 130 nm CMOS process tolerant up total ionizing doses (TID) predicted lifetime detector, that maximum 66 Mrad (660 kGy) (Si) endcap region. architecture performance presented context long program which...
Abstract Single Event Effects (SEEs) — predominately bit-flips in electronics caused by particle interactions - are a major concern for ASICs operated high radiation environments such as ABCStar ASICs, which designed to be used the future ATLAS ITk strip tracker. The chip design is therefore optimised protect it from SEEs implementing triplication techniques Triple Modular Redundancy (TMR). In order verify protection mechanisms of design, cross-section Upsets (SEUs), particular class SEEs,...
Abstract The Muon g -2 Experiment at Fermilab uses a gaseous straw tracking detector to make detailed measurements of the stored muon beam profile, which are essential for experiment achieve its uncertainty goals. Positrons from decays spiral inward and pass through before striking an electromagnetic calorimeter. is therefore located inside vacuum chamber in region where magnetic field large non-uniform. As such, must have low leak rate maintain high-quality vacuum, be non-magnetic so as not...
In this paper we describe the DECAL Monolithic Active Pixel Sensor (MAPS) for digital electromagnetic calorimetry. The sensor consists of a matrix 64x64 55um pixels, and provides readout at 40MHz number particles which have struck in preceding 25ns. It can be configured to report as total sum across (equivalent pad an analogue calorimeter) or per column traditional strip detector). Design operation is described, results chip characterisation are reported compared simulations. Keywords—CMOS...
A data acquisition (DAQ) system has been developed which will read out and control calorimeters serving as prototype systems for a future detector at an electron-positron linear collider. This is modular, flexible scalable DAQ in the hardware signals are standards-based, using FPGAs serial links. The idea of backplaneless was also pursued with commercial development board housed PC chain concentrator cards between it forming basis system. As well describing concept performance system, its...
The LHC luminosity upgrade, known as the High Luminosity (HL-LHC), will require replacement of existing silicon strip tracker and transistion radiation tracker. Although a baseline design for this exists ATLAS collaboration other non-ATLAS groups are exploring feasibility using CMOS Monolithic Active Pixel Sensors (MAPS) which would be arranged in strip-like fashion take advantage service support structure already being developed upgrade. Two test devices made with AMS H35 process (a voltage...
The planned HL-LHC (High Luminosity LHC) in 2025 is being designed to maximise the physics potential through a sizable increase luminosity up 6·1034 cm−2s−1. A consequence of this increased expected radiation damage at 3000 fb−1 after ten years operation, requiring tracking detectors withstand fluences over 1·1016 1 MeV neq/cm2. In order cope with consequent readout rates, complete re-design current ATLAS Inner Detector (ID) developed as Tracker (ITk).
The ATLAS experiment is a general purpose detector aiming to fully exploit the discovery potential of Large Hadron Collider (LHC) at CERN. It foreseen that after several years successful data-taking, LHC physics programme will be extended in so-called High-Luminosity LHC, where instantaneous luminosity increased up 5 × 1034 cm−2 s−1. For ATLAS, an upgrade scenario imply complete replacement its internal tracker, as existing not provide required performance due cumulated radiation damage and...
Applicability of the Adaptive Cross Approximation and hierarchical matrix approach to problems computational electromagnetics is examined both theoretically numerically. Reduction required storage speed-up during each step a numerical solution are analyzed. Numerical examples produced using Northrop Grumman's proprietary code SWITCH, which based on hybrid FEM-BIE method.