A5105982211- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Advanced X-ray Imaging Techniques
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Laser-Plasma Interactions and Diagnostics
- Radiation Detection and Scintillator Technologies
- Magnetic confinement fusion research
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Therapy and Dosimetry
- Diamond and Carbon-based Materials Research
- Nuclear reactor physics and engineering
- Plasma Diagnostics and Applications
- Advanced Optical Sensing Technologies
- Atomic and Molecular Physics
- Photocathodes and Microchannel Plates
- Advancements in Photolithography Techniques
- Graphite, nuclear technology, radiation studies
- Experimental and Theoretical Physics Studies
- Sports Dynamics and Biomechanics
- Combustion and Detonation Processes
- Pulsed Power Technology Applications
- Orbital Angular Momentum in Optics
European Spallation Source
2016-2024
Diamond Light Source
2004-2013
Centre Français des Fonds et Fondations
2007
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2003
Eindhoven University of Technology
2002-2003
ExxonMobil (United States)
1997
Third generation synchrotron light sources are characterized by a low emittance and coupling. Some already operating with extremely coupling close to 0.1%. Measurement of the transverse beam size is generally used measure To this end, several systems currently an x-ray pinhole camera one them. In paper we derive point spread function both analytically numerically using Fresnel diffraction integral taking into account broadband spectrum bending magnet source, show that optimized design allows...
Abstract Using historical data, we highlight the consequences of anthropogenic ecosystem modifications on abundance mosquitoes implicated as current most important potential malaria vector, Anopheles hyrcanus, and West Nile virus (WNV) Culex modestus, in Camargue region, France. From World War II to 1971, populations these species increased rice cultivation expanded region a political context that supported agriculture. They then fell, likely because decreased pesticide use control pest. The...
In this paper we present the experience at Diamond Light Source in design, implementation, and operation of low momentum compaction factor lattices for generation short x-ray pulses coherent THz radiation. The effects higher-order terms expansion on beam dynamics are reviewed from a theoretical point view, details both high- low-emittance solutions discussed. Measurements taken to characterize under variety machine conditions presented, along with practical limitations that exist as is made...
Novel beam-intercepting materials and targetry concepts are essential to improve the performance, reliability operation lifetimes of next generation multi-megawatt (multi-MW) accelerator target facilities. The components must sustain an order-of-magnitude increase in particle beam intensities beyond current state-of-the-art. With conventional already limiting scope experiments, it is crucial investigate novel materials, technologies that will satisfy requirements maximize physics benefits...
Single shot transverse emittance measurement is essential to assess the beam quality and performance of new generation light sources such as linac based X-ray Free Electron Lasers (FELs) or laser plasma wakefield accelerators (LPWA). To this end, we have developed a single using at least 3 screens inserted in same time, measuring size different positions drift space one shot. In paper, firstly present theoretical aspects perform measurement. We secondly show experimental results obtained...
The static solution of the Fokker-Planck equation, known as Haissinski equation and governing longitudinal evolution an electron beam moving in a Storage-Ring which is subject to inductive wake field, can be expressed analytical form, using Lambert W-function. We show how use this tool allows better understanding validity numerical solutions distribution normalization properties.
The Beam Current Monitor system of the ESS linac will be mainly based on AC Transformers. BCM used to monitor beam current and charge in absolute differential modes. measurement is also intended for detecting large sudden losses acting Machine Interlock System (MIS), especially areas where Loss Monitors cannot reliably used. A demo a Bergoz ACCT MTCA.4 electronics has been procured integrated into EPICS. VHDL code developed successfully tested required FPGA signal processing including droop...
Hard X-ray undulator radiation at 3rd generation storage rings falls between the geometrical and fully coherent limit. This is a result of small but finite emittance electron beam source means that cannot be completely modelled by incoherent ray tracing or wave propagation. We have developed using wavefront propagation code Synchrotron Radiation Workshop (SRW) running in Python environment, parallel computer program Monte Carlo method for modelling partially emission from sources taking into...
The proton linac of the European Spallation Source, under construction in Lund, Sweden, had beam commissioning its ion source (IS) and following low energy transport (LEBT) at their final locations from September 2018 to July 2019. This was first several stages for ESS, towards start user program 2023. paper presents highlights characterizations IS LEBT aforementioned period, including behavioral change against parameters, error identifications trajectory LEBT, preliminary characterization...
In this paper, we present the results from a numerical code developed to study effect of space charge on performance Ionisation Profile Monitors. The has been analytical expression electromagnetic field generated by 3D bunch charged particles moving along one axis. This transient is evaluated calculate momentum gained test particle, but not necessary co-moving with bunch, and included in non-linear ordinary differential equation solver (Runge-Kutta) track motion particle. model IPM complete...
Abstract This paper presents a detector developed to protect the ESS spallation target. The is installed receive proton beam that has peak current of 62.5 mA, an average power 5 MW, and energy up 2 GeV. It designed detect any part goes outside defined aperture, which deemed as errant condition. mainly used for machine protection. works based on two physical processes. first process generation in metallic blades, proportional intercepting beam. second heat load from deposition interacting...
The European Spallation Source, now under construction in Lund, Sweden, aims to be the world's most powerful pulsed neutron scattering facility. Driving source is a 5 MW superconducting proton linear accelerator operating at 4 percent beam duty factor and 14 Hz repetition rate. Nineteen partner institutions from across Europe are working with Accelerator Division Lund design construct accelerator. suite of instrumentation consists over 20 unique system types developed by partners...
As part of the development beam imaging system at European Spallation Source, luminescent screens have been fabricated by flame spraying scintillating materials onto stainless steel backings. A total seven were produced, three chromia alumina (Al2O3:Cr), two YAG (Y3Al5O12:Ce) and a 50/50 mix these. The properties these under proton irradiation evaluated using 2.55 MeV currents up to 10 μA. Irradiation times 25 h per sample, during which luminescence-, spectrographic-, thermal- current-data...
This paper gives an analytical description of the stationary regime a storage-ring free-electron laser in presence maximum detuning (compatible with onset) between pulse and electron beam when they pass interact optical cavity. In this condition, conservation first moments intensity distribution allows one to express peak gain light amplification process as function system parameters that are directly measurable. These theoretical results compared experiments performed on Super-ACO laser.
This paper gives an overview of the optical and X‐ray diagnostics for 3‐GeV stored electron beam DIAMOND storage ring. The specification requirement are given in detail. performed using properties synchrotron radiation from two bending magnets visible range. Four measurements will provide information on longitudinal distribution, relative energy spread, transverse size, emittance beam.