A5035918645- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Radiation Effects in Electronics
- Astrophysics and Cosmic Phenomena
- Ion-surface interactions and analysis
- Radio Astronomy Observations and Technology
- Nuclear Physics and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Mass Spectrometry Techniques and Applications
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Superconducting and THz Device Technology
- Analytical chemistry methods development
- Integrated Circuits and Semiconductor Failure Analysis
- Luminescence Properties of Advanced Materials
- Photovoltaic System Optimization Techniques
- Laser-Matter Interactions and Applications
- Soil Moisture and Remote Sensing
- Galaxies: Formation, Evolution, Phenomena
- Superconducting Materials and Applications
- Silicon and Solar Cell Technologies
- Advanced Optical Sensing Technologies
Rutherford Appleton Laboratory
2016-2024
European Organization for Nuclear Research
2022-2024
University of Oxford
2012-2024
University of Freiburg
2024
University College London
2024
University of Pennsylvania
2024
University of Liverpool
2016
Science Oxford
2010
The ``pixel imaging mass spectrometry'' camera is used to perform femtosecond laser-induced Coulomb explosion of 3,5-dibromo-3${}^{\ensuremath{'}}$,5${}^{\ensuremath{'}}$-difluoro-4${}^{\ensuremath{'}}$-cyanobiphenyl molecules prealigned in space. experiment allows the concurrent detection correlated two-dimensional momentum images all ionic fragments resulting from fragmentation multiple each acquisition cycle. studies provide rich information about parent molecular structure and dynamics,...
PImMS, or Pixel Imaging Mass Spectrometry, is a novel high-speed monolithic CMOS imaging sensor tailored to mass spectrometry requirements, also suitable for other dark-field applications. In its application time-of-flight spectrometry, the permits ion arrival time distributions be combined with 2D imaging, providing additional information about initial position velocity of ions under study. PImMS1, first generation in this family, comprises an array 72 by pixels on 70 μm pitch. Pixels...
The development of sensors capable detecting particles and radiation with both high time positional resolution is key to improving our understanding in many areas science. Example applications such range from fundamental scattering studies chemical reaction mechanisms through imaging mass spectrometry surfaces, neutron aimed at probing the structure materials, time-resolved fluorescence measurements elucidate function biomolecules. In addition improved throughput resulting parallelisation...
The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarisation survey at a frequency of 5 GHz, designed to provide complementary data the surveys WMAP and Planck, future CMB B-mode polarization imaging surveys. observing has been chosen signal that dominated by Galactic synchrotron emission, but suffers little from Faraday rotation, so measured directions good template for higher observations, carry direct information about magnetic field. Telescopes in both northern southern hemispheres...
Abstract The RD53 collaboration has since 2013 developed new hybrid pixel detector chips with 50 × μm 2 pixels for the HL-LHC upgrades of ATLAS and CMS experiments at CERN. A common architecture, design verification framework been to enable final different sizes be designed, verified tested handle extreme hit rates 3 GHz/cm (up 12 GHz per chip) together an increased trigger rate 1 MHz efficient readout up 5.12 Gbits/s chip. Tolerance extremely hostile radiation environment Grad over 10 years...
We present the first multimass velocity-map imaging data acquired using a new ultrafast camera designed for time-resolved particle imaging. The PImMS (Pixel Imaging Mass Spectrometry) sensor allows events to be imaged with time resolution as high 25 ns over acquisition times of more than 100 μs. In photofragment studies, this images multiple fragment masses on each time-of-flight cycle. describe architecture and bench-testing photofragments formed in UV photolysis two test molecules: Br2...
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...
We report on `proof of concept' experiments in Pixel Imaging Mass Spectrometry (PImMS) using an ultra-fast frame-transfer CCD camera and also describe intelligent CMOS sensor which is being developed for this application by the PImMS collaboration UK. a combination traditional TOF mass spectrometry ion imaging. Information provided imaging gives access to valuable structural information molecule under investigation, addition normal spectrum. Recording 2D spatial arriving ions allows...
Imaging mass spectrometry is a powerful technique that allows chemical information to be correlated spatial coordinate on sample. By using stigmatic ion microscopy, in conjunction with fast cameras, multiple masses can imaged within single experimental cycle. This means fewer laser shots and acquisition cycles are required obtain full data set, samples suffer less degradation as overall collection time reduced. We present the first imaging results obtained new time-stamping detector, named...
The C-Band All-Sky Survey is a project to map the full sky in total intensity and linear polarization at 5 GHz. northern component of survey uses broad-band single-frequency analogue receiver fitted 6.1-m telescope Owens Valley Radio Observatory California, USA. architecture combines continuous-comparison radiometer correlation polarimeter single for stable simultaneous measurement both polarization, using custom-designed components. measures temperature difference between...
The C-Band All-Sky Survey (C-BASS) aims to produce sensitive, all-sky maps of diffuse Galactic emission at 5 GHz in total intensity and linear polarization. These will be used (with other surveys) separate the several astrophysical components contributing microwave emission, particular allow an accurate map synchrotron produced for subtraction foregrounds from measurements polarized Cosmic Microwave Background. We describe design analog instrument, optics our 6.1 m dish Owens Valley Radio...
A new technique for studying surface photochemistry has been developed using an ion imaging time-of-flight mass spectrometer in conjunction with a fast camera capable of multimass imaging. This technique, called pixel spectrometry (PImMS), applied to the study butanone photooxidation on TiO2(110). In agreement previous studies this system, it was observed that main pathway involves ejection ethyl radical into vacuum which, as confirmed by our experiment, undergoes fragmentation after...
This paper reports on the development and commissioning of GP2 detector. was developed to address requirement for a high-resolution event-mode imaging detector, application in energy-resolved neutron radiography. The name derives from use gadolinium as conversion material, combined with second-generation mass spectrometry sensor known PImMS2. Theoretical measured characteristics are compared, emphasis usability functionality detector has been steered by design philosophy which established...
RATIONALE Imaging mass spectrometry is a powerful analytical technique capable of accessing large volume spatially resolved, chemical data from two‐dimensional samples. Probing the entire surface sample simultaneously requires detector with high spatial and temporal resolutions, ability to observe events relating different mass‐to‐charge ratios. METHODS A commercially available time‐of‐flight spectrometer, designed for matrix‐assisted laser desorption/ionization (MALDI) analysis, was...
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,...
In this paper, we present the Pixel Imaging Mass Spectrometry (PImMS) sensor, a pixelated Time-of-Flight (TOF) sensor for use in mass spectrometry. The device detects any event which produces signal above programmable threshold with timing resolution of 25ns. Both analogue and digital readout modes are available all pixels can be individually trimmed to improve noise performance. themselves contain conditioning circuitry as well complex logic totalling more than 600 transistors. This large...
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...