A5000499013- Advanced X-ray Imaging Techniques
- Laser-Matter Interactions and Applications
- Laser-Plasma Interactions and Diagnostics
- Fluid Dynamics and Turbulent Flows
- X-ray Spectroscopy and Fluorescence Analysis
- Solar and Space Plasma Dynamics
- Enzyme Structure and Function
- Advanced Fiber Laser Technologies
- Crystallography and Radiation Phenomena
- Advanced Electron Microscopy Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Surface Roughness and Optical Measurements
- Adhesion, Friction, and Surface Interactions
- RNA and protein synthesis mechanisms
- Advanced Fluorescence Microscopy Techniques
- Magnetic confinement fusion research
- Fungal and yeast genetics research
- Control and Dynamics of Mobile Robots
- Composite Structure Analysis and Optimization
- Numerical methods in engineering
- Photosynthetic Processes and Mechanisms
- Nonlinear Waves and Solitons
- Asphalt Pavement Performance Evaluation
- Ionosphere and magnetosphere dynamics
- Particle Dynamics in Fluid Flows
European X-Ray Free-Electron Laser
2016-2023
Ludwig-Maximilians-Universität München
2014
Indian Statistical Institute
1997-1999
S.N. Bose National Centre for Basic Sciences
1997
Abstract X-ray free-electron lasers (XFELs) enable novel experiments because of their high peak brilliance and femtosecond pulse duration. However, non-superconducting XFELs offer repetition rates only 10–120 Hz, placing significant demands on beam time sample consumption. We describe serial crystallography performed at the European XFEL, first MHz rate delivering 1.128 trains 10 Hz. Given short spacing between pulses, damage caused by shock waves launched one XFEL probed subsequent pulses...
User operation at the European X-ray Free-Electron Laser Facility started SASE1 undulator beamline in fall 2017. The majority of experiments utilize optical lasers (mostly ultrafast) for pump–probe-type measurements combination with pulses. This manuscript describes purpose-developed pump–probe laser system as installed SASE1, implemented features and plans further upgrades.
We present the main features of final prototype a pulsed optical laser, developed for pump-probe and other experiments in conjunction with femtosecond x-ray beams at European X-ray free-electron laser facility. Adapted to temporal emission pattern facility, provides 10 Hz bursts up 600 µs duration intra-burst pulse frequencies as high 4.5 MHz. In this mode, we have generated pulses short 12 fs 350 W average power during burst beam qualities close diffraction limit. This is, best our...
Pump-probe experiments at X-ray free-electron laser (XFEL) facilities are a powerful tool for studying dynamics ultrafast and longer timescales. Observing the in diverse scientific cases requires optical systems with wide range of wavelength, flexible pulse sequences different durations, especially pump source. Here, pump-probe instrumentation available measurements Single Particles, Clusters, Biomolecules Serial Femtosecond Crystallography (SPB/SFX) instrument European XFEL is reported. The...
Ultrafast X-ray spectroscopies require flexible properties together with high temporal and spectral resolution. Here, we demonstrate simultaneous sub-20 fs sub-eV resolutions for pump/probe experiments, without the need additional photon arrival-time monitors.
The advent of X-ray free-electron lasers (XFELs) has revolutionized fundamental science, from atomic to condensed matter physics, chemistry biology, giving researchers access X-rays with unprecedented brightness, coherence and pulse duration. All XFEL facilities built until recently provided pulses at a relatively low repetition rate, limited data statistics. Here, results the first megahertz-repetition-rate scattering experiments Spectroscopy Coherent Scattering (SCS) instrument European...
The effect of ion and electron drifts on the existence arbitrary amplitude solitary waves is studied using Sagdeev’s pseudopotential method. It found that if drift velocity u0 finite, may exist for relatively large values v0/c, where v0 c light.
Expressions for the classical added-mass coefficients have been calculated case of two arbitrary circular cylinders using dipolar coordinate system. These are then applied to calculate three nonzero identical in terms constants Jacobian elliptic functions. A calculation procedure is also evolved different radii. Finally, these results extended twin shape a certain family conformal mappings.
We provide a detailed description of serial femtosecond crystallography (SFX) dataset collected at the European X-ray free-electron laser facility (EuXFEL). The EuXFEL is first high repetition rate XFEL delivering MHz pulse trains 10 Hz. short spacing (<1 µs) between pulses requires fast flowing microjets for sample injection and frame detectors. A data set was recorded microcrystalline mixture least three different jack bean proteins (urease, concanavalin A, B). one megapixel Adaptive Gain...
This paper describes the need for proper signal conditioning of an acoustic emission (AE) transducer output contact detection with pico sliders. The key to involves design and implementation a filtering scheme target slider body vibration frequencies in range 1.25-2.0 MHz. Data, form frequency content AE measured on two different types laser zone textured disks mechanically disk, as function disk rotational velocity, is presented illustrate validity properly tuned detection. data also...
Recent advances in the development of attosecond soft X-ray sources ranging into 'water window' spectral range, between carbon 1s and oxygen states (284 eV - 543 eV), are also driving suited broadband multilayer optics for beam steering dispersion management. The relatively low intensity current High Harmonic Generation (HHG) calls an efficient use photons, thus low-loss is uttermost importance. Here, we report about realization atomically smooth interfaces CrSc mirrors by optimized ion...
Pump-probe experiments at the cutting-edge x-ray free-electron laser facility European XFEL [1] require ultrashort pulses high repetition rates and with pulse energy. However, mJ-class, sub-10 fs, MHz rate lasers are not readily available, hence must be developed. In particular, an extension towards ultraviolet wavelengths through resonant dispersive wave emission [2] would enable novel applications EuXFEL. Here, we demonstrate first steps reaching this goal, namely spectral broadening of...
The instability of the large-scale motion a thin layer electron vortices produced by interaction intense laser pulse and uniform plasma is studied here. standard point vortex models sheet flow field involve unphysical singularities in field, leading to ill-posed problems. To make problem well posed description terms blobs considered. If has smooth localized core then linear growth rates rapidly decrease zero at high wave numbers, thus providing natural ultraviolet cutoff. Such model can be...
We present the design, installation and first operation results of pump-probe laser at SASE 1 undulator beamline European XFEL. Like XFEL, is designed to operate in burst-mode, providing up millijoule level few-cycle pulses MHz repetition rates, generated amplified a multi-stage parametric amplifier.
The advent of X-ray free-electron lasers (XFELs) has revolutionized fundamental science, from atomic to condensed matter physics, chemistry biology, giving researchers access X-rays with unprecedented brightness, coherence, and pulse duration. All XFEL facilities built until recently provided pulses at a relatively low repetition rate, limited data statistics. Here, we present the results first megahertz rate scattering experiments Spectroscopy Coherent Scattering (SCS) instrument European...
Evolution of two-dimensional turbulence in plasmas is studied here using the Euler equations a square cavity. To describe dense plasma fluids, vortex blob model has been used. It observed that generation and propagation small local disturbances play crucial role 2D flows. The produced by these soon destroy themselves process initial large scale vorticity distribution decays into quiescent dipole state.
Simulation of 2D Euler flows in a flat channel using multi-level vortex method indicates that flows, local disturbances (defects) develop spontaneously and grow. The constant vorticity lines then become non-differentiable the inertial scales. Here we study possible limiting nowhere differentiable configurations as functions smallest Holder class consider their corresponding energy spectrum. We find spectrum is strongly influenced by flow geometry short-range microscopic structure.