S. Griffiths
A5106304556- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- Neutrino Physics Research
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Laser Design and Applications
- Computational Physics and Python Applications
- Historical and Literary Studies
- Magnetic Properties and Applications
- High-Voltage Power Transmission Systems
- Astrophysics and Cosmic Phenomena
- European Political History Analysis
- Radiation Therapy and Dosimetry
- Photocathodes and Microchannel Plates
- Nuclear reactor physics and engineering
- Advanced X-ray and CT Imaging
- Pulsed Power Technology Applications
Sci-Tech Daresbury
2017-2023
Daresbury Laboratory
2012-2022
University of Iowa
2012-2022
Science and Technology Facilities Council
2018
Fermi Research Alliance
2017
European Organization for Nuclear Research
2012-2014
Institute of High Energy Physics
2012
American Meteorological Society
2007
The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate principle of ionization cooling as a technique for reduction phase-space volume occupied by muon beam. channels are required Neutrino Factory and Collider. MICE evaluate in detail performance single lattice cell Feasibility Study 2 channel. Beam has been constructed ISIS synchrotron RAL, Step I, it characterized using beam-instrumentation...
The compact linear accelerator for research and applications (CLARA) is an ultrabright electron beam test facility being developed at STFC Daresbury Laboratory. ultimate aim of CLARA to advanced free laser (FEL) schemes that can later be implemented on existing future short-wavelength FELs. In addition, a unique provide high-quality novel concepts ideas in wide range disciplines function as technology demonstrator United Kingdom x-ray FEL facility. built three phases; the first phase, or...
A novel single-particle technique to measure emittance has been developed and used characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The beams, whose mean momenta vary from 171 281 MeV/c, have emittances of approximately 1.5--2.3 \pi mm-rad horizontally 0.6--1.0 vertically, a horizontal dispersion 90--190 mm momentum spreads about 25 MeV/c. There is reasonable agreement between measured parameters results simulations. are found meet requirements MICE.
The Muon Ionization Cooling Experiment (MICE) will perform a detailed study of ionization cooling to evaluate the feasibility technique. To carry out this program, MICE requires an efficient particle-identification (PID) system identify muons. Electron-Muon Ranger (EMR) is fully-active tracking-calorimeter that forms part PID and tags muons traverse channel without decaying. detector capable identifying electrons with efficiency 98.6%, providing purity for beam exceeds 99.8%. EMR also proved...
The international Muon Ionization Cooling Experiment (MICE) will perform a systematic investigation of ionization cooling with muon beams momentum between 140 and 240\,MeV/c at the Rutherford Appleton Laboratory ISIS facility. measurement in MICE relies on selection pure sample muons that traverse experiment. To make this selection, Beam is designed to deliver beam less than $\sim$1\% contamination. final employs particle-identification (PID) system upstream downstream cell. PID includes...
High-brightness muon beams of energy comparable to those produced by state-of-the-art electron, proton and ion accelerators have yet be realised. Such the potential carry search for new phenomena in lepton-antilepton collisions extremely high also provide uniquely well-characterised neutrino beams. A beam may created through decay pions interaction a with target. To produce high-brightness from such source requires that phase space volume occupied muons reduced (cooled). Ionization cooling...
The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, technique by which it is proposed cool muon beam at a future neutrino factory or collider. emittance measured from an ensemble muons assembled those that pass through experiment. A pure selected using particle-identification system can reject efficiently both pions and electrons. position momentum each are high-precision scintillating-fibre tracker in 4 T solenoidal...
Muon beams of low emittance provide the basis for intense, well-characterised neutrino necessary to elucidate physics flavour at a factory and lepton-antilepton collisions energies up several TeV muon collider. The international Ionization Cooling Experiment (MICE) aims demonstrate ionization cooling, technique by which it is proposed reduce phase-space volume occupied beam such facilities. In an ionization-cooling channel, passes through material in loses energy. energy lost then replaced...
Muon beams of low emittance provide the basis for intense, well-characterised neutrino a factory and multi-TeV lepton-antilepton collisions at muon collider. The international Ionization Cooling Experiment (MICE) has demonstrated principle ionization cooling, technique by which it is proposed to reduce phase-space volume occupied beam such facilities. This paper documents performance detectors used in MICE measure muon-beam parameters, physical properties liquid hydrogen energy absorber...
In this report the RF system design for EMMA (Electron Machine with Many Applications) is described. a proof of principle Non-scaling FFAG that adopts an acceleration scheme will prove useful fast particles. For instance in medical applications, such as Hadron Therapy and future neutrino factory designs Muon acceleration. The worlds first accelerator kind currently under construction at Daresbury Laboratories. power source options, supplies, waveguide distribution control discussed. nature...
Muon accelerators offer an attractive option for a range of future particle physics experiments. They can enable high energy (TeV+) lepton colliders whilst mitigating the difficulty synchrotron losses, and provide intense beams neutrinos fundamental experiments investigating flavor. The method production muon results in beam emittance which must be reduced efficient acceleration. Conventional control schemes take too long, given very short (2.2 microsecond) rest lifetime muon. Ionisation...
Diversified Technologies, Inc. (DTI) has developed a unique short-pulse klystron modulator system for delivery to the Compact Linear Advanced Research Accelerator (CLARA) Project at Daresbury Laboratory. This is based on combination of high voltage solid-state switch, conventional 1:7 pulse transformer, and passive corrector with automated adjustment. circuitry delivers extremely flat output required advanced accelerator applications.
Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulation codes, such as GEANT4 (v7.0), over-estimated scattering. The Muon Ionization Cooling Experiment (MICE) measured cooling muon beam liquid hydrogen or lithium hydride (LiH) energy absorber part programme to develop accelerator facilities, Neutrino Factory...
The RF system for the 2 GeV Synchrotron Radiation Source (SRS), at Daresbury Laboratory consists of a 250 kW klystron feeding four normal conducting cavities via waveguide feeder system. power converter is 50 kV 15 A conventional roller regulator 6-pulse rectifier set with capacitor smoothing, giving an energy storage 27 kJ. There 'crowbar' using 4 ignitrons in series, this dumps stored 6 /spl mu/S protection under spark conditions. Control output by adjustment modulating anode voltage high...