A5049673063- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Laser Design and Applications
- Particle accelerators and beam dynamics
- Pulsed Power Technology Applications
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Laser Material Processing Techniques
- Microwave Engineering and Waveguides
- Advanced X-ray Imaging Techniques
- Plasma Diagnostics and Applications
- Nuclear Physics and Applications
- Crystallography and Radiation Phenomena
- Antenna Design and Optimization
- Terahertz technology and applications
- Microwave-Assisted Synthesis and Applications
- Photonic and Optical Devices
- Magnetic confinement fusion research
- Semiconductor Lasers and Optical Devices
- Advanced Surface Polishing Techniques
- Muon and positron interactions and applications
- Induction Heating and Inverter Technology
- Mechanical and Optical Resonators
- X-ray Spectroscopy and Fluorescence Analysis
Kharkiv Institute of Physics and Technology
2007-2024
Deutsches Elektronen-Synchrotron DESY
2018
We present a status update on the dedicated R\&D facility SINBAD which is currently under construction at DESY. The will host multiple independent experiments acceleration of ultra-short electron bunches and novel, high gradient methods. first experiment ARES-experiment with normal conducting 100\,MeV S-band linac its core. objectives this ranging from study compression techniques to sub-fs level application as injector for various advanced schemes e.g. plans use ARES test-site DLA in...
The AXSIS project (Attosecond X-ray Science: Imaging and Spectroscopy) aims to develop a THz-driven compact source for applications e.g. in chemistry biology by using ultrafast coherent diffraction imaging spectroscopy. key components of are the electron gun dielectric loaded linear accelerator as well an inverse Compton scattering scheme X-rays production. This paper is focused on prototype which capable accelerating electrons up tens keV. Such was manufactured tested at test-stand DESY....
The numerical studies of high acceleration gradients obtaining for the dielectric laser accelerators (DLA) based on-chip structures with one-sided excitation at a wavelength 800 nm are presented. electron flight heights 200 and 400 over structure influence geometric parameters on was also investigated. A study changes in structures, when applying gold coating these types has been carried out.
To mitigate the BBU instability and improve characteristics of accelerated bunches in Dielectric Wakefield Accelerator one can be used isotropic plasma filling transport channel. Here we present results analytical numerical studies dynamics electron/positron drive electron under wake acceleration a DWA (PDWA) with vacuum The field is excited by an bunch quartz dielectric tube inserted into cylindrical metal waveguide. inner region filled channel along waveguide axis. At simulations energy...
A dielectric-loaded linac powered by THz-pulses is one of the key parts "Attosecond X-ray Science: Imaging and Spectroscopy" (AXSIS) project at DESY, Hamburg. As in conventional accelerators, AXSIS designed to have phase velocity equal speed light which, this case, realized tuning thickness dielectric layer radius vacuum channel. Therefore, structure fabrication errors will lead a change beam dynamics quality. Additionally, bunch injection also affect acceleration process can cause loss on...
The main results of theoretical and experimental researches concerning the physical processes in a dielectric wakefield accelerator based on accelerating excitation structure with use long sequence electron bunches are presented. enhancement excited amplitude is achieved owing to coherent summation wakefields generated by separate bunches. accelerated total arbitrarily dividing bunch into exciting parts, using appropriate frequency detuning repetition respect principal transverse mode....
Studies were made into the arise and an evolution of beam breakup (BBU) instability in a rectangular dielectric resonator under excitation by sequence relativistic electron bunches. The is metal waveguide $R_{26}$ $(45mm\times 90mm)$ with Teflon slabs $8.2mm$ thick (dielectric constant $\varepsilon=2.051$) located along wide side resonator. wavelength $LM_{21}$ operating mode having symmetric profile longitudinal electric field component $53.2mm$. energy bunches $4.5MeV$ , charge each bunch...
This paper presents a theoretical study aimed at solving the problem of compensation for second and third order dispersion in CPA laser systems. We propagation light pulses generated by Ti-Sapphire master oscillator along path stretcher-amplifiers-compressor. The wave equation balance equations are used to analyze various amplifier configurations. research results include values deviation compressor length angle incidence pulse on input diffraction grating compressor. Different versions...
A theoretical and experimental study of wakefield excitation by a profiled sequence relativistic electron bunches in the plasma-dielectric structure, parameters which provide conditions for small decelerating field all driver with simultaneous growth number accelerating total was carried out. Theoretically, transformation ratio found experiment as to that decelerates bunches. In performed experiments, measured microwave probe. The magnitude is determined shift maximum spectrum magnetic...
A linear theory of wakefield excitation by a ramped electron bunch train in cylindrical plasma-dielectric waveguide is presented. It shown that during an process the drive bunches are focusing field due to radial electric plasma wave. The possibility both obtaining high transformer ratio and witness demonstrated.
A nonlinear self-consistent theory has been constructed and used to investigate numerically the wakefield excitation in multilayered dielectric resonators by relativistic electron bunches. Analytical expressions for solenoidal potential components of an excited electromagnetic field have derived. The a five-zone resonator bunches was investigated comparison made between longitudinal distribution axial electric results obtained previously corresponding problem waveguide formulation. necessity...
The results of studies wakefield excitation in a section dielectric tube inserted metal waveguide are presented. is shorter than waveguide. Dependences the longitudinal electric field registered some points from length For PIC simulations parameters experimental installation "Almaz-2" were chosen. It shown that radiated and recorded vacuum part cylindrical has character sinusoid growing when increasing tube. oscillation period equal to half wavelength E01 mode resonance with electron...
Wakefield excitation by a single relativistic electron bunch in plasma-dielectric accelerating structure has been studied both analytically and numerically. The represents dielectric-loaded cylindrical metal waveguide, which partially plasma-filled channel (the hollow plasma channel) to transport charged particles. Assuming the linear regime of excitation, analytical expressions have derived for longitudinal radial wakefields generated finite-size bunch. Axial profiles wakefield component...
Theoretical research and numerical modeling of excitation a wake field in the dielectric resonator by regular sequence lengthy relativistic magnetized electron bunches is carried out. Dependences maximal amplitude longitudinal electric on bunch length are investigated.
The theoretical analysis of a multifrequency regime excitation coaxial slow-wave structure shows perspectives such transmission line for manufacturing the microwave devices, capable to work simultaneously on several frequencies. Changing energy electron beam, it is possible control amplitude-frequency spectrum output signal. There are energies electrons beam which realized simultaneous amplification all waves. complete efficiency amplifier at increasing number launched waves remains high...