Papers by Konstantin Zolotarev
Interfacial Phenomena and Heat Transfer
Physics Procedia, 2016
In situ investigation of thermo-stimulated decay of hydrides of titanium and zirconium by means o... more In situ investigation of thermo-stimulated decay of hydrides of titanium and zirconium by means of X-ray diffraction of synchrotron radiation
Physics Procedia, 2016
Arabinogalactan, a water-soluble natural polysaccharide, has potent innate immuno-modulatory and ... more Arabinogalactan, a water-soluble natural polysaccharide, has potent innate immuno-modulatory and anti-cancer activity and can serve as a carrier material in targeted drug delivery. The molecular weight and supramolecular structure of the polymer are very important for its pharmacological and technological applications. In this work, we used synchrotron small-angle X-ray scattering as an instrument to study the supramolecular structure of arabinogalactan in aqueous solutions. The formation of polymer associates was confirmed also by means of the terahertz laser ablation and atomic force microscopy studies. SAXS experiments were made at accelerators complex VEPP-3/VEPP-4.
Physics Procedia, 2016
The phase formation sequences, intermediate and final products of aluminum nanopowder combustion ... more The phase formation sequences, intermediate and final products of aluminum nanopowder combustion are studied. The experiments were performed in the Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, at the "Precision Diffractometry II" station (SR beamline No. 6 of the VEPP-3 electron storage ring). The main combustion product was found to be aluminum nitride. In the combustion of aluminum nanopowder aluminum γ-oxide is the first to form, and aluminum nitride arises next. The formation of aluminum nitride probably occurs by successive replacement of oxygen by nitrogen from the aluminum oxide. The use of synchrotron radiation with high photon flux made it possible to determine with moderate time resolution the sequence of stages of formation of crystalline products during combustion of the aluminum nanopowder.
X-Ray Spectrometry, 1996
The first 100 m core-drill sample which was obtained by drilling from a boat frozen in the ice of... more The first 100 m core-drill sample which was obtained by drilling from a boat frozen in the ice of Lake Baikal (BDP-93-1) was quantitatively investigated by synchrotron radiation XRF to investigate the trace element contents. The ability to change the energy of the exciting monochromatic beam and the high intensity of the radiation allow the investigations to be performed with detection limits of 1-2 ppm for groups of geochemically important elements, Rb-Nb, BaNd , and for milligram samples. The results showed geochemical inhomogeneity in the 61-65 m range of the core-drill, characterized by higher ratios of Sr to Rb, Sr to Y and Sr to Ce compared with other sections of the core.
Vacuum, 2012
A record low horizontal emittance of 1 nm-rad was successfully obtained in PETRA III third genera... more A record low horizontal emittance of 1 nm-rad was successfully obtained in PETRA III third generation synchrotron light source. A key system that allowed reaching such value includes 20 permanent magnet damping wigglers installed in two long straight sections. The wigglers radiate almost 1 MW at maximum current of hard X-ray radiation which issues a challenge for the design of SR absorbers and vacuum system components for the damping wiggler section. The paper describes in detail the design consideration, manufacturing and experimental performance of absorbers and vacuum system. The first experimental results of PETRA III damping wiggler section operation are presented.
Journal of Synchrotron Radiation, 2002
An X-ray diffractometer for industrial applications has been designed, installed at SPring-8 BL24... more An X-ray diffractometer for industrial applications has been designed, installed at SPring-8 BL24XU and tested by measuring a standard Al 2 O 3 powder sample. The measurement results prove the high precision of the diffractometer. The diffractometer was also tested by conducting grazing-incidence X-ray diffraction measurements of ion-implanted chromium-coated steel. The validity of a new method for X-ray stress measurements of polished stainless steel is also proposed and con®rmed. The results prove the suitability of this diffractometer for industrial applications.
The Compact Linear Collider (CLIC) will require ultralow emittance electron and positron beams. T... more The Compact Linear Collider (CLIC) will require ultralow emittance electron and positron beams. The targeted emittance will be achieved by radiative damping in the CLIC damping rings. For an efficient damping high-field short-period superconducting damping wigglers will be employed. In the conceptual design phase of CLIC, the basic layout of these wigglers has been elaborated at CERN. In the course of the CLIC technical feasibility studies, a full-scale damping wiggler prototype will be installed and tested in the ANKA storage ring. The device is currently under design and construction at the Budker Institute of Nuclear Physics, Russia. Above the magnetic requirements, the main design challenges for the prototype are scalability, particularly of the cooling concept, modularity and the capability of sustaining a high radiative heat load. The experiments at ANKA aim at a validation of the technical concepts applied to meet these requirements. Beyond that an extended experimental program on beam dynamics and alternative technical solutions is envisaged. This contribution gives an overview over the current status of the project and the further planning.
SYNCHROTRON AND FREE ELECTRON LASER RADIATION: Generation and Application (SFR-2020), 2020
The CLIC damping rings should produce the ultra-low emittance necessary for the high luminosity p... more The CLIC damping rings should produce the ultra-low emittance necessary for the high luminosity performance of the collider. This combined to the high bunch charge present a number of beam dynamics and technical challenges for the rings. Lattice studies have been focused on low emittance cells with optics that reduce the effect Intra-beam scattering. The final beam emittance is reached with the help of super-conducting damping wigglers. Results from recent simulations and prototype measurements are presented, including a detailed absorption scheme design. Collective effects such as electron cloud and fast ion instability can severely limit the performance and mitigation techniques have been identified and tested. Tolerances for alignment and technical system design such as kickers, RF cavities, magnets and vacuum have been finally established.
A vacuum vessel design of wiggler sections should meet a few challenging specification. The SR po... more A vacuum vessel design of wiggler sections should meet a few challenging specification. The SR power of about 40 kW is generated in each wiggler. Expanding fan of SR radiation reaches the beam vacuum chamber walls in the following wiggler and may cause the following problem: massive power dissipation on vacuum chamber walls inside the cryogenic vessel, radiation damage of superconducting coil, high photo-electron production rate that cause an e-cloud build-up to unacceptable level. Therefore this power should be absorbed in the places where these effects are tolerable or manageable. A few possible solutions for tackling all SR related problems as well as vacuum design are discussed in the paper in details.
An ultra-low emittance lattice based on the ANKA ring geometry is under investigation in framewor... more An ultra-low emittance lattice based on the ANKA ring geometry is under investigation in framework of the feasibility studies for a compact low emittance synchrotron light source at the Karlsruhe Institute of Technology (Germany). An attempt to apply the concept of split bending magnets cells and to reduce the natural emittance of the bare ANKA DBA lattice from 90 nm rad down to 2.5 nm rad with not-vanishing dynamic aperture is described in this paper. The TME cell with split bends and a quadrupole lens in-between as well as a pair of non-interleaved sextupole lenses separated by “–I ” unit transfer matrix of betatron oscillations allows to decrease the theoretical minimum emittance of ANKA ring down to approximately 6 nm rad. Further reduction of the phase space volume requires to brake “–I ” symmetry and add extra families of sextupoles, locate an additional high order field elements inside the quadrupoles, optimize the phase advance between sextupole families, shift the betatron ...
First beam dynamics studies of a damping wiggler prototype for the CLIC damping rings have been c... more First beam dynamics studies of a damping wiggler prototype for the CLIC damping rings have been carried out at the KIT storage ring. Efects of the 2.9 T superconducting wiggler on the electron beam in the 2.5 GeV standard operation mode have been measured and compared with theoretical predictions. Higher order multipole components were investigated using local orbit bump measurements. Based on these findings the simulation models for the storage ring optics have been adjusted. The refined optics model has been applied to the 1.3 GeV, low-alpha operation case. This case will be used to experimentally benchmark beam dynamics simulations involving strong wiggler fields and dominant collective efects. We present these measurements, comparisons and the findings of the simulations with the updated low-alpha mode optics model.
In a collaboration between CERN, BINP and KIT a prototype of a superconducting damping wiggler fo... more In a collaboration between CERN, BINP and KIT a prototype of a superconducting damping wiggler for the CLIC damping rings has been installed at the ANKA synchrotron light source. On the one hand, the foreseen experimental program aims at validating the technical design of the wiggler, particularly the conduction cooling concept applied in its cryostat design, in a long-term study. On the other hand, the wiggler’s influence on the beam dynamics particularly in the presence of collective effects is planned to be investigated. ANKA’s low-alpha shortbunch operation mode will serve as a model system for these studies on collective effects. To simulate these effects and to make verifiable predictions an accurate model of the ANKA storage ring in low-alpha mode, including the insertion devices is under parallel development. This contribution reports on the first operational experience with the CLIC damping wiggler prototype in the ANKA storage ring and steps towards the planned advanced ex...
Physics Procedia, 2016
Abstract The zirconium alloy (Zr1%Nb) samples with a micron-thick nickel layer were investigated ... more Abstract The zirconium alloy (Zr1%Nb) samples with a micron-thick nickel layer were investigated for hydrogen sorption ability. Hydrogenation was carried out by gas phase method at temperatures of 350, 450 and 550° C. Hydrogen pressure in chamber was 1 atm. Hydrogen sorption curves were obtained on the automated complex Gas Reaction Controller. In situ X-ray diffraction measurements of the process of hydrogen saturation of samples were carried out at the station “Precision diffractometry» at Siberian Synchrotron and Terahertz Radiation Center of the Budker Institute of Nuclear Physics. Hydrogen absorption rate by Zr1%Nb alloy increases by order of magnitude with increasing temperature. The phase transitions significantly affect the rate of hydrogen absorption at constant temperature. Measurements were performed using SR from the VEPP-3 storage ring.
Physics Procedia, 2016
Abstract VEPP-4 is a multipurpose storage ring facility at Budker Institute of Nuclear Physics (N... more Abstract VEPP-4 is a multipurpose storage ring facility at Budker Institute of Nuclear Physics (Novosibirsk, Russia) with several research programs including high energy physics in colliding beam mode, nuclear physics, synchrotron radiation, accelerator physics study, etc. The paper discusses VEPP-4 activities relating to generation and application of synchrotron radiation not only for SR user community but for beam diagnostics in storage ring as well.
IEEE Transactions on Applied Superconductivity, 2016
The Compact Linear Collider (CLIC) will require ultralow emittance electron and positron beams. S... more The Compact Linear Collider (CLIC) will require ultralow emittance electron and positron beams. Such emittance will be achieved by radiative damping in the CLIC damping rings that will be realized by a use of high-field short-period superconducting damping wigglers. In the course of the CLIC technical feasibility studies, a full-scale damping wiggler prototype was fabricated in BINP. Main parameters of the wiggler are 51 mm of period, 3 T of magnetic field, 1.8 m of magnetic length, 18 mm of the pole gap, and indirect cooling by LHe. Four cryocoolers were used in the wiggler design, which allow its ordinary operation without LHe consumption. Above the magnetic requirements, the main design challenges for this prototype are scalability, particularly of the cooling concept, modularity, and the capability of sustaining a high radiative heat load. The wiggler powering tests and performance of the cryogenic system are described in this paper.
Physical Review Special Topics - Accelerators and Beams, 2012
To achieve high luminosity at the collision point of the Compact Linear Collider (CLIC) the norma... more To achieve high luminosity at the collision point of the Compact Linear Collider (CLIC) the normalized horizontal and vertical emittances of the electron and positron beams must be reduced to 500 nm and 4 nm before the beams enter the 1.5TeV linear accelerators. An effective way to accomplish ultra-low emittances with only small effects on the electron polarization is using damping rings operating at 2.86 GeV equipped with superconducting wiggler magnets. This paper describes a technical design concept for the CLIC damping wigglers.
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Papers by Konstantin Zolotarev