Graeme Burt
A5024023727- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Microwave Engineering and Waveguides
- Pulsed Power Technology Applications
- Terahertz technology and applications
- Laser-Plasma Interactions and Diagnostics
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Particle physics theoretical and experimental studies
- Photonic and Optical Devices
- Electromagnetic Simulation and Numerical Methods
- Dark Matter and Cosmic Phenomena
- Plasma Diagnostics and Applications
- Radiation Therapy and Dosimetry
- Advanced Radiotherapy Techniques
- Neutrino Physics Research
- Photocathodes and Microchannel Plates
- Laser-Matter Interactions and Applications
- Advanced X-ray Imaging Techniques
- Superconductivity in MgB2 and Alloys
- Muon and positron interactions and applications
- Laser Design and Applications
Cockcroft Institute
2016-2025
Lancaster University
2015-2024
Sci-Tech Daresbury
2014-2024
Lancaster City Council
2017-2024
University of Liverpool
2024
University of Huddersfield
2024
Daresbury Laboratory
2014-2022
Digital Research Alliance of Canada
2022
University of Manchester
2021
Google (United States)
2019
High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase or reduce size accelerator, new acceleration schemes need be developed. Plasma wakefield acceleration, which electrons plasma are excited, leading strong electric fields, is one such promising novel technique. Pioneering experiments shown an intense laser pulse electron bunch traversing plasma, drives fields 10s...
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment CERN the world׳s first experiment. AWAKE will be installed in former CNGS facility uses 400 GeV/c beam bunches from SPS. experiments focus on self-modulation instability of long (rms ~12 cm) bunch plasma. These are planned for end 2016. Later, 2017/2018, low energy (~15 MeV)...
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in 2030s. ILC addresses key questions for our current understanding of particle physics. It based proven technology. Its experiments will challenge Standard Model physics and provide window to look beyond it. This document brings story up date, emphasizing its strong motivation, readiness construction, opportunity it presents US community.
We give direct experimental evidence for the observation of full transverse self-modulation a long, relativistic proton bunch propagating through dense plasma. The exits plasma with periodic density modulation resulting from radial wakefield effects. show that is seeded by ionization front created using an intense laser pulse copropagating bunch. extends over length following seed point. By varying one order magnitude, we frequency scales expected dependence on density, i.e., it equal to...
The seeded self-modulation of a relativistic, charged particle bunch in plasma is shown to grow both along the and plasma, resulting transverse wakefield amplitudes that far exceed initial seed values.
Abstract CompactLight is a Design Study funded by the European Union under Horizon 2020 research and innovation funding programme, with Grant Agreement No. 777431. was conducted an International Collaboration of 23 international laboratories academic institutions, three private companies, five third parties. The project, which started in January 2018 duration 48 months, aimed to design innovative, compact, cost-effective hard X-ray FEL facility complemented soft source pave road for future...
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here ready for systematic study of seeded self-modulation 400\,GeV proton bunch in 10\,m-long rubidium with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. short laser pulse used ionization vapor propagates all way along column, suggesting full vapor. occurs bunch, at time and follows affects bunch.
Helically corrugated waveguides have recently been studied for use in various applications such as interaction regions gyrotron traveling-wave tubes and backward-wave oscillators a dispersive medium passive microwave pulse compression. The paper presents summary of methods that can be used analysis the wave dispersion waveguides. results obtained from an analytical approach, simulations with three-dimensional numerical code MAGIC, cold measurements are analyzed compared.
We investigate the use of tapered rectangular dielectric-lined waveguides (DLWs) for acceleration low-energy, subrelativistic, electron bunches by interaction with multicycle narrowband terahertz (THz) pulses. A key challenge exists in this subrelativistic regime; velocity changes significantly as energy is gained. To keep electrons accelerating phase, phase must also be increased to match. present simulations which demonstrate that dielectric thickness can kept constant and width lining...
The EUROnu project has studied three possible options for future, high intensity neutrino oscillation facilities in Europe. first is a Super Beam, which the neutrinos come from decay of pions created by bombarding targets with 4 MW proton beam CERN High Power Superconducting Proton Linac. far detector this facility 500 kt MEMPHYS water Cherenkov, located Fr\'ejus tunnel. second Neutrino Factory, and beams storage ring. case 100 magnetized iron at baseline 2000 km. third option Beta beta...
This report describes the conceptual design of a proposed free electron laser test facility called CLARA that will be major upgrade to existing VELA accelerator at Daresbury Laboratory in UK. able number new schemes have been but require proof principle experiment confirm they perform as predicted. The primary focus on ultra short photon pulse generation which take lasers into whole regime, enabling area science emerge.
Periodically-poled lithium niobate (PPLN) sources consisting of custom-built stacks large-area wafers provide a unique opportunity to systematically study the multi-cycle terahertz (THz) generation mechanism as they are assembled layer-by-layer. Here we investigate and optimize THz emission from PPLN wafer function number, pump fluence, pulse duration chirp, separation, focusing. Using 135 µm-thick, 2"-diameter generate high-energy, narrowband pulses with central frequencies up 0.39 THz,...
There has been a drive in recent years to produce ultrahigh power short microwave pulses for range of applications. These high-power can be produced by pulse compression. Sweep-frequency based compression using smooth bore hollow waveguides is one technique passive compression, however, at very high powers, this method some limitation due its operation close cutoff. A special helical corrugation circular waveguide ensures an eigenwave with strongly frequency dependent group velocity far from...
The applications of magnetrons to high power proton and cw electron linacs are discussed. An experiment is described where a 2.45 GHz magnetron has been used drive single cell superconducting cavity. With the injection locked, modest phase control accuracy 0.95\ifmmode^\circ\else\textdegree\fi{} rms demonstrated. Factors limiting performance have identified.
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...
Compactness and cost-effectiveness are two major concerns in the development of a Ka-band linearizer, which is crucial accelerator component European CompactLight project. A higher order mode (HOM) multibeam Klystron (MBK) could accommodate distributed electron current with low operating voltage 60 kV, thus making it competitive to deliver high RF power at frequency compared single beam or fundamental MBK. In this article, modeling design study 36-GHz HOM MBK presented. The double...
The occurrence of vacuum arcs or radio frequency (rf) breakdowns is one the most prevalent factors limiting high-gradient performance normal conducting rf cavities in particle accelerators. In this paper, we search for existence previously unrecognized features related to incidence by applying a machine learning strategy cavity data from CERN's test stand Compact Linear Collider (CLIC). By interpreting parameters learned models with explainable artificial intelligence (AI), reverse-engineer...
The AWAKE collaboration prepares a proton driven plasma wakefield acceleration experiment using the SPS beam at CERN. A long bunch extracted from interacts with high power laser and 10 m rubidium vapor cell to create strong wakefields allowing sustained electron acceleration. probe these is created by an accelerator consisting of rf-gun booster structure. This source should provide beams intensities between 0.1 1 nC, lengths 0.3 3 ps emittance order 2 mm mrad. structure accelerate electrons...