A. N. Artemiev

Precision positioning devices

Abstract This paper describes a series of positioning devices driven by piezoelectric transducers that have been developed and are intended to be used for the precise orientation of light-weight objects, in particular of specimens during physical investigations, movable elements in spectrometers, and for the precise focusing of laser beams, etc.

Determination of the electron beam size at the Kurchatov synchrotron radiation source using an X-ray refractive lens

The electron beam size in the storage ring of the Kurchatov synchrotron radiation source at 2.5 GeV is determined using an x-ray two-dimensional parabolic refractive lens. The vertical size of the electron beam of the storage ring is found to be 270 μm, which exceeds the corresponding design value 140 μm (at a betatron coupling of 1%). The difference is explained by the imperfect geodetic arrangement of ring elements and the incomplete adjustment of the ring.

The SIBERIA dedicated synchrotron radiation source: status report on the storage rings complex at the Kurchatov Institute for Atomic Energy

Abstract This paper reviews the status of the SIBERIA storage rings complex. The parameters of the linac, booster synchrotron and main ring are given. The transfer of the SIBERIA-1 storage ring to its new site is described. The main parameters of the engineering systems for the SIBERIA complex are presented. The assembly of the SIBERIA-2 storage ring is planned to be finished in 1991. The SIBERIA storage rings complex has been constructed at the Kurchatov Institute for Atomic Energy (IAE) and is the first dedicated synchrotron radiation source in the USSR. The facility includes the SIBERIA-1 450 MeV electron storage ring, the SIBERIA-2 2.5 GeV electron storage ring, two electron transport lines EOC-1 and EOC-2, and an 80–100 MeV electron linac which serves as the injector. The general layout of SIBERIA is shown in fig. 1. All accelerators of the SIBERIA facility are designed and manufactured at the Institute of Nuclear Physics (INP) at Novosibirsk.

A Deep X-ray Lithography beamline at the Kurchatov Synchrotron Radiation Source: First results

Abstract A Deep X-ray Lithography (DXRL) beamline at the Kurchatov Synchrotron Radiation Source (KSRS) has been constructed and commissioned. For the irradiation a simple exposure apparatus and synchrotron radiation with a critical energy of about 7 keV was used. Samples with resist thickness of 300 μm and 500 μm have been exposed using a test mask. SEM results are shown.

Debye-Scherrer diffraction in the backscattering geometry at the Kurchatov Synchrotron Radiation source. Part 1. Characterization of the method

A technique for Debye-Scherrer diffraction in the backscattering geometry is developed at the Kurchatov Synchrotron Radiation source. It is shown that the sensitivity of the method to a relative change in the lattice constant is higher by two orders of magnitude than that in the forward-scattering geometry. The requirements for experimental apparatus are discussed.

Debye-scherrer diffraction in the backscattering geometry at the kurchatov synchrotron radiation source: Part 2. Equipment, pilot experiments, and data processing

Equipment is constructed, a technique is developed, and experimental results on Debye-Scherrer diffraction in the backscattering geometry are obtained. A special program for diffraction ring processing is developed. The prospects for use of this technique for materials science purposes are discussed.

Spectrometer with vertical dispersion mode for studying chemical shifts in X-ray emission lines with the use of synchrotron radiation: preliminary experiment

The spectrometer proposed uses white synchrotron radiation for fluorescence excitation. The fluorescence analysis is carried out by a double crystal diffractometer in the vertical dispersion mode. We simulate experimental data taking the uranium Lα1 emission line (e = 13.6 keV, Δe = 11.3 eV) and Kurchatov Synchrotron Radiation Source parameters. We take into account the following parameters: the partial absorption cross section of the element under investigation μpart(e), the SR spectral distribution, the Gaussian vertical photon angle distribution σz′ph(e), and the Gaussian vertical electron linear and angle distributions σzel and σz′el. The emission X-ray line has been taken to have a Lorentz form. The transmission coefficient of the double crystal spectrometer in high dispersion position has been taken to have a Gauss-form σDar. The following results have been achieved. A measurement accuracy Δee ≅ 10−6 can be achieved when measuring for ∼ 100 s with E = 2.5 GeV and I = 100 mA. Here Δe is the statistic uncertainty of the line position and ϵ is the emission line energy. The natural line width will not be increased by the spectrometer convolutions by more than 20%, so the line form can be investigated very carefully. Based on piezoelectric transducers, the diffractometer is now being commissioned. A preliminary experiment in vertical dispersion mode has been performed and fitted with the theory.

Kurchatov Synchrotron Radiation Source status report on active proposals

Abstract An overview of the active proposals performed at the Kurchatov Synchrotron Radiation Source is presented.

About systematic studying of chemical shifts in X-ray emission lines with the use of synchrotron radiation

Abstract A physical basis is given for the advisability to study chemical shifts in X-ray emission lines with the use of synchrotron radiation. X-ray emission lines investigation is a comparatively old method but its former application was essentially restricted by the low intensities of traditional X-ray sources. This results in a low resolution. The application of SR to excite X-ray fluorescence makes it possible to hope for a drastic increase in the accuracy of measurements of line positions, considerably higher resolution, lower background, decrease in the probe mass, and shortening of measurement time. A systematic investigation of chemical combinations will be possible from Ca ( Z = 20) practically to the end of the periodic table. The method of identification of a chemical combination can be worked out using the sum of a total of 8–10 emission line shifts. Some theoretical aspects of emission line chemical shifts are presented. The factors determining the chemical shift value are the following: atom valence, combination spatial configuration, and ligand “size”. A series of chemical combinations is proposed for systematic experimental investigations and theoretical calculations.

The multipole superconducting wiggler for the SIBERIA-2 storage ring

Abstract The project of the multipole superconducting wiggler for the SIBERIA-2 storage ring is discussed. The wiggler will be used for the generation of high-intensity synchrotron radiation (SR) beams in the X-ray energy region of 5–25 keV and will allow the SR beam intensity to be increased by a factor of 30–100. A SR beam driver system is also proposed, which would increase the number of independently operating stations on the SR wiggler beam lines.