A5089588290- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Advanced X-ray Imaging Techniques
- Particle Accelerators and Free-Electron Lasers
- Laser Design and Applications
- High-pressure geophysics and materials
- Laser-Matter Interactions and Applications
- Optical Imaging and Spectroscopy Techniques
- Atomic and Molecular Physics
- Ion-surface interactions and analysis
- Pulsed Power Technology Applications
- Nuclear Physics and Applications
- Advanced X-ray and CT Imaging
- Electron and X-Ray Spectroscopy Techniques
- Radiation Therapy and Dosimetry
- Digital Radiography and Breast Imaging
- Chemical and Physical Properties of Materials
- Water Governance and Infrastructure
- Advanced MRI Techniques and Applications
- High-Energy Particle Collisions Research
- Ocular and Laser Science Research
- Radiation Detection and Scintillator Technologies
Deutsches Elektronen-Synchrotron DESY
2015-2024
TU Dortmund University
2022
Universität Hamburg
2019-2022
Center for Free-Electron Laser Science
2022
Substantial energy loss in an electron beam passing through a high-intensity laser provides clear evidence of the radiation reaction, shedding light on how electrons interact with extreme electromagnetic fields.
A tunable plasma-based energy dechirper has been developed at FLASHForward to remove the correlated spread of a 681 MeV electron bunch. Through interaction bunch with wakefields excited in plasma projected was reduced from FWHM 1.31% 0.33% without reducing stability incoming beam. The experimental results for variable density are good agreement analytic predictions and three-dimensional simulations. proof-of-principle dechirping strength 1.8 GeV/mm/m significantly exceeds those demonstrated...
Laser-plasma acceleration (LPA) is a compact technique to accelerate electron bunches highly relativistic energies, making it promising candidate power radiation sources for industrial or medical applications. We report on the generation of beams from an 80 MeV-level LPA setup based ionization injection (II) over duration 8 hours at repetition rate 2.5 Hz, resulting in 72,000 consecutive shots with charge and acceleration. Over full operation time moving averages total beam 14.5 pC between...
The FLASHForward experimental facility is a high-performance test-bed for precision plasma wakefield research, aiming to accelerate high-quality electron beams GeV-levels in few centimetres of ionized gas. created by ionizing gas cell either high-voltage discharge or high-intensity laser pulse. electrons be accelerated will injected internally from the background externally FLASH superconducting RF front end. In both cases, driven provided gun and linac modules operating with 10 Hz...
We describe a laser-plasma platform for photon-photon collision experiments to measure fundamental quantum electrodynamic processes such as the linear Breit-Wheeler process with real photons. The has been developed using Gemini laser facility at Rutherford Appleton Laboratory. A wakefield accelerator and bremsstrahlung convertor are used generate collimated beam of photons energies hundreds MeV, that collide keV x-ray generated by heated plasma target. To detect pairs collisions, magnetic...
Precise characterization and tailoring of the spatial temporal evolution plasma density within sources is critical for realizing high-quality accelerated beams in wakefield accelerators. The simultaneous use two independent diagnostic techniques allowed temporally spatially resolved detection with unprecedented sensitivity enabled temperature at local thermodynamic equilibrium discharge capillaries. A common-path two-color laser interferometer obtaining average a $2\times 10^{15}$ cm$^{-2}$...
Highly polarized, multi-kiloampere-current electron bunches from compact laser-plasma accelerators are desired for numerous applications. Current proposals to produce these beams suffer intrinsic limitations the reproducibility, charge, beam shape, and final polarization degree. In this paper, we propose colliding pulse injection (CPI) as a technique generation of highly polarized prepolarized plasma sources. Using particle-in-cell simulations, show that enables trapping precise control over...
Employing colliding-pulse injection has been shown to enable the generation of high-quality electron beams from laser–plasma accelerators. Here, by using test particle simulations, Hamiltonian analysis, and multidimensional particle-in-cell we lay theoretical framework for spin-polarized beam in scheme. Furthermore, show that this scheme enables production quasi-monoenergetic excess 80% polarization tens pC charge with commercial 10-TW-class laser systems.
Readily available bright X-ray beams with narrow bandwidth and tunable energy promise to unlock novel developments in a wide range of applications. Among emerging alternatives large-scale costly present-day radiation sources which severely restrict the availability such beams, compact laser-plasma-accelerator-driven inverse Compton scattering show great potential. However, these are currently limited tens percent bandwidths, unacceptably large for many Here, we conceptually that using active...
We report on a novel, noninvasive method applying Thomson scattering to measure the evolution of electron beam energy inside laser-plasma accelerator with high spatial resolution. The determination local enabled in-situ detection acting acceleration fields without altering final state. In this Letter we demonstrate that accelerating evolve from (265±119) GV/m (9±4) in plasma density ramp. presented data show excellent agreement particle-in-cell simulations. This provides new possibilities...
Polarised particle beams are indispensable for the study of spin-dependent processes . The LEAP (Laser Electron Acceleration with Polarisation) project at DESY aims to demonstrate acceleration polarised electrons in extremely high fields enabled by laser plasma accelerators create energy electron ultra-compact footprint. In this proof principle experiment, spin-polarised energies tens MeV will be generated a sub-millimetre long source. For such energies, Compton transmission polarimetry is...
Abstract Plasma-wakefield accelerators driven by intense particle beams promise to significantly reduce the size of future high-energy facilities. Such applications require with a well-controlled energy spectrum, which necessitates detailed tailoring plasma wakefield. Precise measurements effective wakefield structure are therefore essential for optimising acceleration process. Here we propose and demonstrate such measurement technique that enables femtosecond-level (15 fs) sampling...
A Correction to this paper has been published: https://doi.org/10.1038/s41467-020-20676-1
As a basic diagnostic tool, scintillation screens are employed in particle accelerators to detect charged particles. In extension the recent revision on calibration of commonly applied context plasma acceleration [T. Kurz et al., Rev. Sci. Instrum. 89 (2018) 093303], here we present charge three DRZ (Std, Plus, High), which promise offer similar spatial resolution other screen types whilst reaching higher conversion efficiencies. The was performed at Electron Linac for beams with high...
This paper describes the utilization of beam-driven plasma wakefield acceleration to implement a high-quality cathode via density-downramp injection in short injector stage at FLASHForward facility DESY. Electron beams with charge up 105 pC and energy spread few percent were accelerated by tunable effective accelerating field 2.7 GV/m. The was operated drift-free very high efficiency. Sources jitter, emittance divergence resulting beam investigated modeled, as strategies for performance...
The charge contained in an electron bunch is one of the most important parameters accelerator physics. Several techniques to measure exist. However, many conventional diagnostics face serious drawbacks when applied plasma accelerators. For example, integrating current transformers (ICTs or toroids) have been shown be sensitive electromagnetic pulses (EMP) originating from plasma, whereas scintillating screens are background radiation such as betatron bremsstrahlung and only allow for a...
The Covid-19 pandemic and the initial focus on handwashing measures have again highlighted importance of water access as an essential service in protecting human health. Yet, especially southern cities, uneven geographies – often mediated by fragmented unequal infrastructure systems may hamper fight against infectious diseases. spread SARS-CoV-2 presented a dilemma for providers well residents water-deprived urban areas they had to adhere new hygiene standards requirements, despite...
X-ray fluorescence imaging (XFI) is a new promising method for in vivo localization of low amounts functionalized gold-nanoparticles (GNPs), enabling early cancer diagnostics and pharmacokinetic tracking studies. At the moment, XFI not applicable human-scales, since modality suffers from an intrinsic high background caused by multiple Compton scattering processes. However, this limitation can be overcome use highly brilliant X-rays combined with advanced filtering schemes. Recent...
Precise characterization and tailoring of the spatial temporal evolution plasma density within sources is critical for realizing high-quality accelerated beams in wakefield accelerators. The simultaneous use two independent diagnostic techniques allowed temporally spatially resolved detection with unprecedented sensitivity enabled temperature at local thermodynamic equilibrium discharge capillaries. A common-path two-color laser interferometer obtaining average a $2\times 10^{15}$ cm$^{-2}$...
International Beam Instrumentation Conference, IBIC16, Barcelona, Spain, 11 Sep 2016 - 15 ; (2016).