39 citations · 230 across the 25 of their papers we have counts for
26 papers · 1 filter
Coupled bunch stability with variable filling patterns in PETRA IV
Sergey Antipov, Chao Li
The PETRA IV upgrade project is aiming at building a 6 GeV diffraction-limited light source. The storage ring`s off-axis accumulation injection scheme will allow generating a wide…
Wakefield assisted bunch compression in storage rings
Sergey A. Antipov, Ilya Agapov, Igor Zagorodnov +1
Equilibrium bunch lengths typical to modern day light sources of tens of picoseconds limit the spectral reach of superradiant approaches for exploring materials and biological samp…
Observation of harmonic lasing in the Angstrom regime at European XFEL
E. A. Schneidmiller, F. Brinker, W. Decking +19
Harmonic lasing provides an opportunity to extend the photon energy range of existing and planned X-ray FEL user facilities. Contrary to nonlinear harmonic generation, harmonic las…
Accurate measurement of uncorrelated energy spread in electron beam
Sergey Tomin, Igor Zagorodnov, Winfried Decking +2
We present measurements of slice energy spread at the injector section of the European X-Ray Free Electron Laser for an electron bunch with charge of 250 pC. Two methods considered…
Experimental validation of collective effects modeling at injector section of x-ray free-electron laser
Igor Zagorodnov, Sergey Tomin, Ye Chen +1
We consider the collective beam dynamics at the injector section of the European XFEL. The results of the measurements for the longitudinal phase space (LPS) of the electron beam a…
Axial representation of external electromagnetic fields for particle tracking in accelerators
Igor Zagorodnov, Martin Dohlus
We derive a power series representation of an arbitrary electromagnetic field near some axis through the coaxial field components on the axis. The obtained equations are compared w…
Passive Ballistic Microbunching of Non-Ultrarelativistic Electron Bunches using Electromagnetic Wakefields in Dielectric-Lined Waveguides
Francois Lemery, Philippe Piot, Gayane Amatuni +14
Temporally-modulated electron beams have a wide array of applications ranging from the generation of coherently-enhanced electromagnetic radiation to the resonant excitation of ele…
Impedances of Anisotropic Round and Rectangular Chambers
Igor Zagorodnov
We consider the calculation of electromagnetic fields generated by an electron bunch passing through an anisotropic transversally non-homogeneous vacuum chamber of round or rectang…
Analytical Impedance Models for Very Short Bunches
Igor Zagorodnov
We discuss several analytical models for impedances of very short bunches. The approximate analytical models are compared with direct solution of Maxwells equations.
Beam Dynamics and Tolerance Studies of the THz-driven Electron Linac for the AXSIS Experiment
K. Galaydych, R. Assmann, U. Dorda +3
A dielectric-loaded linac powered by THz-pulses is one of the key parts of the "Attosecond X-ray Science: Imaging and Spectroscopy" (AXSIS) project at DESY, Hamburg. As in conventi…
Automatic tuning of Free Electron Lasers
I. Agapov, G. Geloni, S. Tomin +1
Existing FEL facilities often suffer from stability issues: so electron orbit, transverse electron optics, electron bunch compression and other parameters have to be readjusted oft…
Wakefields of a Beam near a Single Plate in a Flat Dechirper
Karl Bane, Gennady Stupakov, Igor Zagorodnov
We give formulas for the longitudinal, transverse, and quad point charge wakes for a short bunch of electrons passing by one plate of a flat dechirper.
Corrugated structure insertion for extending the SASE bandwidth up to 3% at the European XFEL
I. Zagorodnov, G. Feng, T. Limberg
The usage of x-ray free electron laser (XFEL) in femtosecond nanocrystallography involves sequential illumination of many small crystals of arbitrary orientation. Hence a wide radi…
Analytical Formulas for Short Bunch Wakes in a Flat Dechirper
K. Bane, G. Stupakov, I. Zagorodnov
We develop analytical models of the longitudinal and transverse wakes, on and off axis for realistic structures, and then compare them with numerical calculations, and generally fi…
Perspectives of Imaging of Single Protein Molecules with the Present Design of the European XFEL. - Part I - X-ray Source, Beamlime Optics and Instrument Simulations
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +3
The Single Particles, Clusters and Biomolecules (SPB) instrument at the European XFEL is located behind the SASE1 undulator, and aims to support imaging and structure determination…
The Full Potential of the Baseline SASE Undulators of the European XFEL
Ilya Agapov, Gianluca Geloni, Guangyao Feng +4
The output SASE characteristics of the baseline European XFEL, recently used in the TDRs of scientific instruments and X-ray optics, have been previously optimized assuming uniform…
Different Charges in the Same Bunch Train at the European XFEL
Yauhen Kot, Torsten Limberg, Igor Zagorodnov
In this paper we have investigated the possibility of the operation of different charges in the bunch train for the nominal design of the XFEL injector and for the case that it is…
Nonlinear undulator tapering in conventional SASE regime at baseline electron beam parameters as a way to optimize the radiation characteristics of the European XFEL
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +2
We demonstrate that the output radiation characteristics of the European XFEL sources at nominal operation point can be easily made significantly better than what is currently repo…
Proposal to generate 10 TW level femtosecond x-ray pulses from a baseline undulator in conventional SASE regime at the European XFEL
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +2
Output characteristics of the European XFEL have been previously studied assuming an operation point at 5 kA peak current. In this paper we explore the possibility to go well beyon…
Purified SASE undulator configuration to enhance the performance of the soft x-ray beamline at the European XFEL
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +2
The purified SASE (pSASE) undulator configuration recently proposed at SLAC promises an increase in the output spectral density of XFELs. In this article we study a straightforward…
Extension of SASE bandwidth up to 2% as a way to increase the efficiency of protein structure determination by x-ray nanocrystallography at the European XFEL
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +3
Femtosecond x-ray nanocrystallography exploiting XFEL radiation is an emerging method for protein structure determination using crystals with sizes ranging from a few tens to a few…
Proposal for a scheme to generate 10 TW-level femtosecond x-ray pulses for imaging single protein molecules at the European XFEL
Svitozar Serkez, Vitali Kocharyan, Evgeni Saldin +3
Single biomolecular imaging using XFEL radiation is an emerging method for protein structure determination using the "diffraction before destruction" method at near atomic resoluti…
Scheme for generating and transporting THz radiation to the X-ray experimental hall at the European XFEL
Winfried Decking, Gianluca Geloni, Vitali Kocharyan +2
The design of a THz edge radiation source for the European XFEL is presented. We consider generation of THz radiation from the spent electron beam downstream of the SASE2 undulator…
A Semi-Analytical Modelling of Multistage Bunch Compression with Collective Effects
Igor Zagorodnov, Martin Dohlus
In this paper we introduce an analytical solution (up to the third order) for a multistage bunch compression and acceleration system without collective effects. The solution for th…