Undulators as the sources of high-brilliance synchrotron radiation are widespread interest in new generations light and free-electron lasers. Microwave propagation a plasma-filled elliptical waveguide can be studied standard short-period undulator. This structure lucrative insertion device installed storage ring third- fourth-generation to produce high-energy radiation. In this article, transve...

The various technologies available to build a SASE-type undulator for a 1As wavelength are compared. This includes permanent magnets, superconducting and room-temperature electromagnets for both the planar and helical-"eld con"gurations. Following a 3D computation of the magnetic "eld, general expressions are given for the peak "eld as a function of the undulator period. The growth length and s...

Static magnetic undulators used by x-ray light sources are fundamentally too limited to achieve shorter undulator periods and dynamic control. To overcome these limitations, we report experimental demonstration of a novel short-period microwave undulator, essentially a Thomson scattering device, that has yielded tunable spontaneous emission and seeded coherent radiation. Its equivalent undulato...

Generating synchrotron radiation from conventional undulators in the hard X-ray region requires high electron energies. In order to open this spectral region for sources with smaller electron energy, such as ANKA (2.5 GeV), the period length of the undulator has to be decreased. In this paper the concept and the first successful tests towards constructing a superconductive micro-undulator with ...

This paper presents the results of numerical simulations of a crystalline undulator based on the channeling of 20 GeV electrons and positrons. The device considered is characterized by a small amplitude and a short period of periodic bending. Calculations have been performed accounting for all-atom interactions using the MBN Explorer software package. The effect of low crystal thickness (less t...

The electromagnetic radiation generated by ultra-relativistic positrons channelling in a crystalline undulator is discussed. The crystalline undulator is a crystal whose planes are bent periodically with the amplitude much larger than the interplanar spacing. Various conditions and criteria to be fulfilled for the crystalline undulator operation are established. Different methods of the crystal...

We discuss the features of a crystalline undulator of the novel type based on the effect of a planar channeling of ultra-relativistic electrons in a periodically bent crystals. It is demonstrated that an electron-based undulator is feasible in the tens of GeV range of the beam energies, which is noticeably higher than the energy interval allowed in a positron-based undulator. Numerical analysis...

A numerical method has been presented to compute the time structure of radiation emitted from a relativistic electron moving inside an undulator, which plays important roles in cutting-edge synchrotron applications. The is based on Lienard-Wiechert potential conjunction with Lorentz equation calculate motion retarded time. In this method, we used Fourier transformation spectral and cut off high...

An X-ray diagnostic station will be installed for each of the XFEL undulator beamlines at TESLA. Primary purpose of the X-ray diagnostics is to provide an additional tool for alignment and commissioning of the numerous undulator cells along an XFEL beamline independently from electron beam based alignment procedures. Both methods will complement one another. The X-ray diagnostic station will be...