Amin Ghaith
A5089312782- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Advanced X-ray Imaging Techniques
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Laser Design and Applications
- Advanced Surface Polishing Techniques
- Pulsed Power Technology Applications
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Nuclear Physics and Applications
- Soil Moisture and Remote Sensing
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Forest Management and Policy
- Astronomical Observations and Instrumentation
- Remote Sensing and LiDAR Applications
- Meteorological Phenomena and Simulations
- Injury Epidemiology and Prevention
- Scientific Computing and Data Management
- African Botany and Ecology Studies
- Particle Detector Development and Performance
- Traumatic Ocular and Foreign Body Injuries
- Occupational Health and Performance
Helmholtz-Zentrum Dresden-Rossendorf
2023-2025
Synchrotron soleil
2017-2022
Territoires, Environnement, Télédétection et Information Spatiale
2022
Université de Montpellier
2022
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2022
Université Paris-Saclay
2017-2020
Université Grenoble Alpes
2018
Laboratoire d'Écologie Alpine
2018
Abstract This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over last four years in unique collaboration 41 laboratories within Horizon 2020 study funded by Union. EuPRAXIA is first project that develops dedicated particle accelerator based on novel plasma acceleration concepts and laser technology. It focuses development electron accelerators underlying technologies, their user communities, exploitation existing...
Abstract Free-electron lasers generate high-brilliance coherent radiation at wavelengths spanning from the infrared to X-ray domains. The recent development of short-wavelength seeded free-electron now allows for unprecedented levels control on longitudinal coherence, opening new scientific avenues such as ultra-fast dynamics complex systems and nonlinear optics. Although those devices rely state-of-the-art large-scale accelerators, advancements laser-plasma which harness...
Abstract With gigaelectron-volts per centimetre energy gains and femtosecond electron beams, laser wakefield acceleration (LWFA) is a promising candidate for applications, such as ultrafast diffraction, multistaged colliders radiation sources (betatron, compton, undulator, free laser). However, some of these the beam performance, example, spread, divergence shot-to-shot fluctuations, need drastic improvement. Here, we show that, using dedicated transport line, can mitigate initial...
High gradient quadrupoles are necessary for different applications such as laser plasma acceleration, colliders, and diffraction limited light sources. Permanent magnet provide a higher field strength compactness than conventional electro-magnets. An original design of permanent based quadrupole (so-called "QUAPEVA"), composed Halbach ring placed in the center with bore radius 6 mm surrounded by four cylinders capable providing 210 T/m, is presented. The QUAPEVAs, including magnetic...
The development of red-shifted free electron lasers (FELs), based on strongly chirped beams, emerged a few years ago. Here we present thorough study the tunability seeded FEL. An analytical model is introduced to describe complex FEL resonance condition and its consequence for emission wavelength. This then benchmarked with experimental data from COXINEL (COherence Xray source INferred Electrons accelerated by Laser) beamline driven laser plasma accelerator at Helmholtz-Zentrum...
Free electron lasers (FELs) are advanced light sources delivering pulses with unprecedented intensity down to the hard x-ray range. Redshifted FEL represents a new scheme exploiting strongly chirped beams emit tunable coherent radiation at wavelengths longer than FEL's resonant condition. While theoretical studies and proposals for this rapidly advancing, experimental evidences so far very limited. Here, we report on nature of spatiospectral properties redshifted FEL, presenting analytical...
Short period, high field undulators are used to produce hard x-rays on synchrotron radiation based storage ring facilities of intermediate energy and enable short wavelength free electron laser. Cryogenic permanent magnet take benefit from improved magnetic properties ${\mathrm{RE}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ (Rare Earth magnets) at low temperatures for achieving coercivity. Using ${\mathrm{Pr}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ instead ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$,...
The laser plasma accelerator has shown a great promise where it uses wakefields achieving gradients as high GeV/cm. With such properties, one would be able to build much more compact accelerators, compared the conventional RF ones, that could used for wide range of fundamental research and applied applications. However, electron beam properties are quite different, in particular, divergence, leading significant growth emittance along transport line. It is, thus, essential mitigate via strong...
Laser Plasma Acceleration (LPA) is capable of producing a GeV beam within cm accelerating distance, but with rather high initial divergence and large energy spread. COXINEL aims to demonstrate compact Free Electron using such source, where specific transport line adequate elements used, as tunable gradient quadrupoles for handling the divergence. An innovative permanent magnet based quadrupole (QUAPEVA) made two superimposed generating 200 T/m presented. The first consists magnets shaped...
The fourth generation of synchrotron radiation sources, commonly referred to as the Free Electron Laser (FEL), provides an intense source brilliant X-ray beams enabling investigation matter at atomic scale with unprecedented time resolution. These sources require use conventional linear accelerators providing high electron beam performance. achievement chirped pulse amplification allowing lasers be operated Terawatt range, opened way for Plasma Acceleration (LPA) technique where energy...
Abstract Undulator based synchrotron light sources and Free Electron Lasers (FELs) are valuable modern probes of matter with high temporal spatial resolution. Laser Plasma Accelerators (LPAs), delivering GeV electron beams in few centimeters, good candidates for future compact sources. However the barriers set by large energy spread, divergence shot-to-shot fluctuations require a specific transport line, to shape beam phase space achieving ultrashort undulator radiation suitable users even...
Laser Plasma Accelerators (LPA) can sustain GeV/m accelerating fields offering outstanding new possibilities for compact applications. Despite the impressive recent developments, LPA beam quality is still significantly lower than in conventional radio-frequency accelerators, which an issue cases of demanding applications such as Free Electron Lasers (FELs). If electron duration below few tens femtosecond keeping pC charges, mrad level divergence and percent energy spread are particularly...
Laser-driven plasma accelerators (LPAs) can generate particle beams with high peak current in a short acceleration distance, making them promising radiation source compact setups. However, minimizing beam divergence at the exit of an LPA is crucial for effective transport, particularly free-electron lasers (FELs). The authors implement integrated lens just centimeter behind LPA, effectively collimating electron straightforward setup. This technique essential generating LPA-driven seeded...
Abstract The Horizon 2020 project EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is producing a conceptual design report for highly compact and cost-effective European facility multi-GeV electron beams accelerated using plasmas. will be set up as distributed Open Innovation platform two construction sites, one focus on beam-driven plasma acceleration (PWFA) another site laser-driven (LWFA). User areas at both sites provide access to free-electron laser pilot...
Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free laser future colliders. Nevertheless, LPA divergence energy spread require an initial strong focus to mitigate the chromatic effects. The reliability, particular with pointing fluctuations, sets real challenge control dispersion along beam transport. We examine here how magnetic defects first quadrupoles, particular,...
Laser plasma acceleration (LPA) enables the generation of an up to several GeV electron beam with a short bunch length and high peak current within centimeter scale. In view undulator type light source applications, manipulation has be applied. We report here on detailed transport for LPA COXINEL test line, that consists strong permanent quadrupoles handle divergence, magnetic chicane reduce energy spread second set adjusting focusing inside undulator. After describing measured...
We report here on spontaneous undulator radiation and free electron laser calculations after a 10-m long transport line (COXINEL) using Laser Plasma acceleration (LPA) source. The enables the manipulation of properties produced beams (energy spread, divergence, dispersion) in view light source applications. beam brightness brilliance are addressed by an analytical approach enabling us to point out influence chromatic effects COXINEL case.
Abstract The EuPRAXIA project aims at designing the world's first accelerator based on advanced plasma-wakefield techniques to deliver 5 GeV electron beams that simultaneously have high charge, low emittance and energy spread, which are required for applications by future user communities. Meeting this challenging objective will only be possible through dedicated effort. Many injection/acceleration schemes been explored means of thorough simulations in more than ten European research...
Laser-plasma accelerators (LPA) deliver relativistic electron beams with high peak current and low emittance, energies up to the GeV-level in only few centimetres. However, divergence energy spread of these remain too large for potential light source applications. A magnetic transfer line can be used manipulate beam phase-space select transmitted a slit located at its center. We will show that proper focusing optics along line, one tune given without loss produce undulator radiation...
The ERC Advanced Grant COXINEL aims at demonstrating free electron laser amplification, a resonant wavelength of 200 nm, based on plasma acceleration source. To achieve the 10 m long dedicated transport line was designed to manipulate beam qualities. It starts with triplet permanent magnet tunable gradient quadrupoles (QUAPEVA) that handles highly divergent beam, demixing chicane slit reduce energy spread per slice, and set electromagnetic provide chromatic focusing in 2 cryogenic undulator....
The recent spectacular development of laser plasma ac- celerators that now can deliver GeV electron beams in an extremelyshortdistancemakesthemverypromising. Ap- plications for light sources based on undulator radiation and free appear as intermediate step to move from acceleration concept accelerator qual- ification. However, the presently achieved divergence energy spread require some beam manipulations. COXINEL test line was designed enabling Free Elec- tron Laser operation with baseline...