A5030661168- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Advanced Electron Microscopy Techniques and Applications
- Particle Detector Development and Performance
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- Advanced Surface Polishing Techniques
- Superconducting Materials and Applications
- Graphite, nuclear technology, radiation studies
- Nuclear Physics and Applications
- Scientific Computing and Data Management
- Nuclear and radioactivity studies
- Radiation Therapy and Dosimetry
- Semiconductor Quantum Structures and Devices
- Optical Coatings and Gratings
- Terahertz technology and applications
- Image and Object Detection Techniques
- Magneto-Optical Properties and Applications
- Microbial Inactivation Methods
- Software Testing and Debugging Techniques
- Advanced Fluorescence Microscopy Techniques
Cockcroft Institute
2011-2024
Daresbury Laboratory
2012-2024
Sci-Tech Daresbury
2012-2024
University of Strathclyde
2011-2014
University of Liverpool
2012
Science and Technology Facilities Council
2007
INC Research (United States)
1984
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...
A method is proposed to generate trains of few-cycle x-ray pulses from a free-electron laser (FEL) amplifier via compact ``afterburner'' extension consisting several few-period undulator sections separated by electron chicane delays. Simulations show that in the hard x ray (wavelength $\ensuremath{\sim}0.1\text{ }\text{ }\mathrm{nm}$; photon energy $\ensuremath{\sim}10\text{ }\mathrm{keV}$) and with peak powers approaching normal FEL saturation (GW) levels, root mean square pulse durations...
A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The uses repeated nonequal electron beam delays delocalize collective FEL interaction and break radiation coherence length dependence on cooperation length. requires no external seeding or photon optics so applicable at any wavelength repetition rate. It demonstrated, using linear theory numerical simulations, that can be increased by approximately 2 orders of...
Understanding the influence of exposure biological systems to THz radiation is becoming increasingly important. There some evidence suggest that can important activities within mammalian cells. This study evaluated high peak power, low average power produced by ALICE (Daresbury Laboratory, UK) synchrotron source on human epithelial and embryonic stem The cells were maintained under standard tissue culture conditions, during which was delivered directly into incubator for various times. cell...
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.
A new scheme for mode locking a free-electron laser (FEL) amplifier is proposed based on electron beam current modulation. It found that certain properties of the original concept (Thompson and McNeil 2008 Phys. Rev. Lett. 100 203901), energy modulation electrons, are improved, including spectral brightness source purity series short pulses. Numerical comparisons made between old schemes mode-locked FEL self-amplified spontaneous emission FEL. Illustrative examples using hypothetical...
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 detailed design of a free electron laser (FEL) amplifier operating in the extreme ultra violet (XUV) and seeded directly by high harmonic source is presented. The part 4th generation light (4GLS) facility proposed for Daresbury Laboratory UK which will offer users suite brightness synchronised sources from THz frequencies into XUV. XUV-FEL generate photons with tunable energies 8 to 100 eV at giga-watt peak power levels near Fourier-transform limited pulses variable polarisation. designs...
We show that the combination of a scanning near field optical microscope and an infra-red free electron laser yields chemical images with sub-cellular spatial resolution have potential to provide diagnostic for oesophageal adenocarcinoma.
The compact linear accelerator for research and applications (CLARA) is a 250 MeV ultrabright electron beam test facility at STFC Daresbury Laboratory. A user beamline has been designed to maximize the exploitation of CLARA in variety fields, including novel acceleration new modalities radiotherapy. In this paper, we present specification design full energy exploitation. We outline key elements that will provide users access ultrashort, low emittance bunches two large experiment chambers....
A proposal for a self-seeding, tunable free-electron laser amplifier operating in the vacuum ultra-violet (VUV) region of spectrum is presented. Full three-dimensional (3D) modelling free electron and optical feedback system has been carried out. Simulations demonstrate generation near transform limited radiation pulses with peak powers hundreds megawatts. Preliminary 1D simulations show that by using similar it may be possible to extend such operation beyond VUV higher photon energies.
The UK New Light Source (NLS) project identified a strong scientific case for next-generation light source to deliver continuous coverage of the photon energy range 50–1000 eV with variable polarisation, 20 fs pulse widths, high degree temporal coherence and 1 kHz repetition rate. Three separate seeded free-electron lasers (FELs) were proposed which in combination satisfy these requirements. It was use harmonic generation (HHG) seed tuneable from 50–100 give direct seeding at fundamental FEL...
It is shown using three-dimensional simulations that the temporal structure of an attosecond pulse train, such as generated via high harmonic generation in noble gases, may be retained a free electron laser amplifier through to saturation mode-locked optical klystron configuration. At wavelengths ∼12 nm, train pulses widths ∼300 with peak powers excess 1 GW are predicted.
The aim of the workshop was to consider what developments might be achievable in next generation light sources. One area particular interest is ultra-short pulses light. High harmonic (HHG) sources are now capable reaching pulse durations range tens hundreds attoseconds, thereby facilitating study electron dynamics. Here we potential free-electron lasers (FELs) contribute this field. First make case for FELs general as a particularly promising source pulses, and summarise some relevant...
The H₂020 CompactLight Project (www. CompactLight.eu) aims at designing the next generation of compact X-rays Free-Electron Lasers, relying on very high gradient accelerating structures (X-band, 12 GHz), most advanced concepts for bright electron photo injectors, and innovative short-period undulators. Compared to existing facilities, proposed facility will benefit from a lower beam energy, due enhanced undulators performance, be significantly more compact, with smaller footprint, as...
A free electron laser (FEL) in a mode-locked optical klystron (MLOK) configuration is modelled using start-to-end simulations that simulate realistic beam acceleration and transport before input into full three-dimensional FEL simulation code. These demonstrate the MLOK scheme compatible with present generation of radiofrequency accelerator designs. train few-optical cycle pulses predicted peak powers similar to those equivalent conventional amplifier. The role energy modulation these...
CompactLight (XLS) is an International Collaboration of 24 partners and 5 third parties, funded by the European Union through Horizon 2020 Research Innovation Programme. The main goal project, which started in January 2018 with a duration 36 months, design hard X-ray FEL facility beyond today’s state art, using latest concepts for bright electron photo-injectors, high-gradient accelerating structures, innovative short-period undulators. specifications parameters future are driven demands...
This paper describes the design of a recirculating linac as driver for suite seeded free-electron lasers (FELs) proposed in UK New Light Source (NLS) project. The choice superconducting technology NLS is required order to deliver bunches at high repetition rates up 1 MHz. raises question whether shorter mode can beam quality FELs. To such facility, careful layout choices and optimizations must be made ensure emittance growth minimized. Effects leading dilution include chromatic transport...