Laurie Nevay
A5036877005- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Advanced Optical Sensing Technologies
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Crystallography and Radiation Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Graphite, nuclear technology, radiation studies
- Advanced Radiotherapy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Data Storage Technologies
- Advanced Fiber Laser Technologies
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
Royal Holloway University of London
2013-2024
European Organization for Nuclear Research
2019-2024
University of Oxford
2010-2014
Science Oxford
2012
We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in 13.6 TeV center-of-mass energy pp collision dataset 35.4 fb^{-1} using active electronic components FASER detector Large Hadron Collider. The candidates required to have track propagating through entire length and be consistent with muon charged-current interaction. infer 153_{-13}^{+12} significance 16 standard deviations above background-only...
Beam Delivery Simulation (BDSIM) is a program that simulates the passage of particles in particle accelerator. It uses suite standard high energy physics codes (Geant4, ROOT and CLHEP) to create computational model accelerator combines accurate tracking routines with all processes Geant4. This unique combination permits radiation detector background simulations accelerators where both required over long range or many revolutions circular machine, as well interaction material
$\mathrm{FASER}\ensuremath{\nu}$ at the CERN Large Hadron Collider (LHC) is designed to directly detect collider neutrinos for first time and study their cross sections TeV energies, where no such measurements currently exist. In 2018, a pilot detector employing emulsion films was installed in far-forward region of ATLAS, 480 m from interaction point, collected $12.2\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ proton-proton collision data center-of-mass energy 13 TeV. We describe...
The FASER experiment at the LHC is designed to search for light, weakly-interacting particles produced in proton-proton collisions ATLAS interaction point that travel far-forward direction. first results from a dark photons decaying an electron-positron pair, using dataset corresponding integrated luminosity of 27.0 fb−1 collected center-of-mass energy s=13.6 TeV 2022 Run 3, are presented. No events seen almost background-free analysis, yielding world-leading constraints on with couplings...
Abstract FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such may be produced in very forward direction of LHC's high-energy collisions and then decay visible inside FASER detector, which placed 480 m downstream ATLAS interaction point, aligned with beam axis. also includes a sub-detector, ν , designed detect neutrinos LHC study their properties. In this paper, each...
A bstract The first FASER search for a light, long-lived particle decaying into pair of photons is reported. uses LHC proton-proton collision data at $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 . 6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity 57 7 fb − 1 model with axion-like particles (ALPs) dominantly coupled weak gauge bosons the primary target. Signal events are...
The first results of the study high-energy electron neutrino (ν_{e}) and muon (ν_{μ}) charged-current interactions in FASERν emulsion-tungsten detector FASER experiment at LHC are presented. A 128.8 kg subset volume was analyzed after exposure to 9.5 fb^{-1} sqrt[s]=13.6 TeV pp data. Four (eight) ν_{e} interaction candidate events observed with a statistical significance 5.2σ (5.7σ). This is direct observation particle collider includes highest-energy ν_{μ} ever detected from an artificial...
FASER is a new experiment designed to search for light weakly-interacting long-lived particles (LLPs) and study high-energy neutrino interactions in the very forward region of LHC collisions at CERN. The experimental apparatus situated 480 m downstream ATLAS interaction-point aligned with beam collision axis. detector includes four identical tracker stations constructed from silicon microstrip detectors. Three form tracking spectrometer, enable detect decay products LLPs decaying inside...
This paper presents the first results of study high-energy electron and muon neutrino charged-current interactions in FASER$\nu$ emulsion/tungsten detector FASER experiment at LHC. A subset volume, which corresponds to a target mass 128.6~kg, was exposed neutrinos from LHC $pp$ collisions with centre-of-mass energy 13.6~TeV an integrated luminosity 9.5 fb$^{-1}$. Applying stringent selections requiring electrons reconstructed above 200~GeV, four interaction candidate events are observed...
The Forward Search Experiment (FASER) at CERN’s Large Hadron Collider (LHC) has recently directly detected the first collider neutrinos. Neutrinos play an important role in all FASER analyses, either as signal or background, and it is therefore essential to understand neutrino event rates. In this study, we update previous simulations present prescriptions for theoretical predictions of fluxes cross sections, together with their associated uncertainties. With these results, discuss potential...
A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This has many advantageous properties over previously studied schemes, including being significantly shorter a given energy having better bandwidth. Experimental results from ATF2 accelerator at KEK are presented that validate operating principle such by demonstrating demagnification 1.3 GeV electron beam down to below 65 nm height...
Abstract The FASER experiment is a new small and inexpensive that placed 480 meters downstream of the ATLAS at CERN LHC. designed to capture decays long-lived particles, produced outside detector acceptance. These rare particles can decay in together with about 500–1000 Hz other originating from interaction point. A very high efficiency trigger data acquisition system required ensure physics events interest will be recorded. This paper describes presents performance results acquired during...
FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such may be produced in very forward direction of LHC's high-energy collisions and then decay visible inside FASER detector, which placed 480 m downstream ATLAS interaction point, aligned with beam axis. also includes a sub-detector, FASER$\nu$, designed detect neutrinos LHC study their properties. In this paper, each component...
Abstract Due to the advancement of proton therapy for cancer treatment, there has been a worldwide increase in construction treatment facilities. Therapy centres are often coupled with clinical, biological or material-science research programs. Research activities require beams at energies spanning an extensive range higher beam currents and longer irradiation times than clinical conditions. Additionally, next-generation systems evolving towards more compact designs. In addition increased...
Optical transition radiation (OTR) has become a commonly used method for 2D beam imaging measurements. In the Accelerator Test Facility 2 (ATF2) at KEK, sizes smaller than OTR point spread function have been measured. Simulations of system performed using ZEMAX software to study effects optical errors such as aberrations, diffraction, and misalignments components. This paper presents comparison simulations with experimental data obtained ATF2. It shows how quantification control impacts on...
We discuss the possibility of creating novel research tools by producing and storing highly relativistic beams ionised atoms in CERN accelerator complex, exciting their atomic degrees freedom with lasers to produce high-energy photon beams.Intensity such would be several orders magnitude higher than offered presently operating light sources, particularly interesting γ-ray energy domain 0.1-400 MeV.In this range, high-intensity can used secondary polarised electrons, positrons, muons,...
Abstract Hadron therapy installations are evolving towards more compact systems that require higher-quality beams for advanced treatment modalities such as proton flash and arc therapy. Therefore the accurate modelling of present next-generation poses new challenges where simulations both magnetic beam transport particle-matter interactions. We a novel approach to building delivery at level suitable clinical applications while seamlessly providing computation quantities relevant dose...
Protons and heavy-ion beams at unprecedented energies are brought into collisions in the CERN Large Hadron Collider (LHC) for high-energy experiments. The LHC multistage collimation system is designed to provide protection against regular abnormal losses order reduce risk of quenches superconducting magnets as well keeping background experiments under control. Compared protons, beam runs more challenging despite lower stored energies, because efficiency cleaning with heavy ions has been...
Optical transition radiation (OTR) arising when a relativistic charged particle crosses boundary between two media with different optical properties is widely used as tool for diagnostics of beams in modern accelerator facilities. The resolution the beam profile monitors based on OTR depends effects system such spherical and chromatic aberrations diffraction. In this paper we present systematic study influencing monitor resolution. Obtained results have shown that can be sub-micrometer...
A laserwire transverse electron beam size measurement system has been developed and operated at the Accelerator Test Facility 2 High Energy Research Organization, Japan (KEK). Special optics were to create an approximately $1\ifmmode\times\else\texttimes\fi{}100\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ ($\text{vertical}\ifmmode\times\else\texttimes\fi{}\text{horizontal}$) location, which was profiled using 150 mJ, 71 ps laser pulses with a wavelength of 532 nm. The precise characterization...
We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in 13.6 TeV center-of-mass energy $pp$ collision data set 35.4 fb${}^{-1}$ using active electronic components FASER detector Large Hadron Collider. The candidates required to have track propagating through entire length and be consistent with muon charged-current interaction. infer $153^{+12}_{-13}$ significance 16 standard deviations above...