Clinical Application of New Immobilization System in Seated Position for Proton Therapy

In November 2015, the proton therapy complex “Prometheus”, developed at PhTC LPI RAS, started being used for the clinical treatment of patients with head and neck cancer. A special mobile patient positioning and immobilization device has been developed within the proton therapy complex “Prometheus”. The purpose of this paper is to report the first clinical experience of using new patient setup system in a seated treatment position. Keywords: proton therapy, ion therapy, pencil beam scanning

Structure and properties study of V-based membrane alloys for ultra-high purity hydrogen production

The reported study was funded by RFBR according to the research project No.16-38-00759 мол_а, the equipment of Shared Research Center Ural-M was used to make this study

Spin physics with antiprotons

New possibilities arising from the availability at GSI of antiproton beams, possibly polarised, are discussed. The investigation of the nucleon structure can be boosted by accessing in Drell-Yan processes experimental asymmetries related to cross-sections in which the parton distribution functions (PDF) only appear, without any contribution from fragmentation functions; such processes are not affected by the chiral suppression of the transversity function $h_1(x)$. Spin asymmetries in hyperon production and Single Spin Asymmetries are discussed as well, together with further items like electric and magnetic nucleonic form factors and open charm production. Counting rates estimations are provided for each physical case. The sketch of a possible experimental apparatus is proposed.Comment: Presented for the proceedings of ASI "Spin and Symmetry", Prague, July 5-10, 2004, to be published in Czech. J. Phys. 55 (2005

Effect of synthesis route on structure and properties of AlCoCrFeNi high-entropy alloy

A series of equatomic AlCoCrFeNi alloys prepared through various synthesis techniques is systematically investigated in the temperature range from 4 K to 1400 K. In this paper we consider their crystalline structure, microstructure, thermo-physical, electron-transport and magnetic properties. Phase transformations, Curie point and also the region for s-phase existence are accurately determined in the system. A mixture of both body centered cubic (BCC) and face centered cubic (FCC) crystal structures is identified in all samples. Depending on synthesis conditions, BCC or FCC solid solution dominates that induces large variations in the properties of the alloys. (C) 2016 Elsevier Ltd. All rights reserved

Effect of synthesis route on structure and properties of AlCoCrFeNi high-entropy alloy

A series of equatomic AlCoCrFeNi alloys prepared through various synthesis techniques is systematically investigated in the temperature range from 4 K to 1400 K. In this paper we consider their crystalline structure, microstructure, thermo-physical, electron-transport and magnetic properties. Phase transformations, Curie point and also the region for s-phase existence are accurately determined in the system. A mixture of both body centered cubic (BCC) and face centered cubic (FCC) crystal structures is identified in all samples. Depending on synthesis conditions, BCC or FCC solid solution dominates that induces large variations in the properties of the alloys. (C) 2016 Elsevier Ltd. All rights reserved

Effect of synthesis route on structure and properties of AlCoCrFeNi high-entropy alloy

A series of equatomic AlCoCrFeNi alloys prepared through various synthesis techniques is systematically investigated in the temperature range from 4 K to 1400 K. In this paper we consider their crystalline structure, microstructure, thermo-physical, electron-transport and magnetic properties. Phase transformations, Curie point and also the region for s-phase existence are accurately determined in the system. A mixture of both body centered cubic (BCC) and face centered cubic (FCC) crystal structures is identified in all samples. Depending on synthesis conditions, BCC or FCC solid solution dominates that induces large variations in the properties of the alloys. (C) 2016 Elsevier Ltd. All rights reserved

Effect of replacing RE and TM on magnetic properties and thermal stability of some Al-Ni-based amorphous alloys

The work was supported by Grant Russian Foundation for Basic Research (Grants RFBR No. 11-03-00469-a and No. 12-03-31399). The experimental results were obtained on the scientific instruments granted by Collective Equipment Center "Ural-M". The authors are thankful to Professor V. Sidorov for help in preparation of amorphous ribbons and Dr. R. Rylcev for stimulating discussions.Amorphous ribbons Al86Ni8Ho6, Al86Ni8Gd6 and Al86Ni6Co2Gd4Y2 were prepared by quenching from 1580-1600 K using spinning technique at a wheel speed of 32 m/s. X-ray diffraction (XRD) analysis of the quenched alloys revealed a clear prepeak located below the main amorphous peak. The specimens crystallize in three stages but glass transition temperature was not found. The crystalinity was calculated by both XRD and differential scanning calorimetry (DSC) methods for all samples. Magnetic properties of ribbons were investigated in wide ranges of temperature (T = 4-900 K) and magnetic field (up to 30 kOe) by Faraday method and vibration sample magnetometry (VSM). The amorphous alloys investigated have no magnetic ordering at low temperatures down to T = 4 K but demonstrate the superparamagnetic behavior. The magnetic properties are discussed in the frames of conception of existence the superparamagnetic clusters with ferrimagnetic ordering. (C) 2012 Elsevier B. V. All rights reserved

Effect of replacing RE and TM on magnetic properties and thermal stability of some Al-Ni-based amorphous alloys

The work was supported by Grant Russian Foundation for Basic Research (Grants RFBR No. 11-03-00469-a and No. 12-03-31399). The experimental results were obtained on the scientific instruments granted by Collective Equipment Center "Ural-M". The authors are thankful to Professor V. Sidorov for help in preparation of amorphous ribbons and Dr. R. Rylcev for stimulating discussions.Amorphous ribbons Al86Ni8Ho6, Al86Ni8Gd6 and Al86Ni6Co2Gd4Y2 were prepared by quenching from 1580-1600 K using spinning technique at a wheel speed of 32 m/s. X-ray diffraction (XRD) analysis of the quenched alloys revealed a clear prepeak located below the main amorphous peak. The specimens crystallize in three stages but glass transition temperature was not found. The crystalinity was calculated by both XRD and differential scanning calorimetry (DSC) methods for all samples. Magnetic properties of ribbons were investigated in wide ranges of temperature (T = 4-900 K) and magnetic field (up to 30 kOe) by Faraday method and vibration sample magnetometry (VSM). The amorphous alloys investigated have no magnetic ordering at low temperatures down to T = 4 K but demonstrate the superparamagnetic behavior. The magnetic properties are discussed in the frames of conception of existence the superparamagnetic clusters with ferrimagnetic ordering. (C) 2012 Elsevier B. V. All rights reserved

Local chemical order in Al92Ce8 metallic glass: The role of 4f-electrons

The work was partly supported by the Russian Foundation for Basic Research and the Government of Sverdlovsk region (grant nos 13-03-96055-ural and 13-02-96036-ural).Using a combination of the synchrotron X-ray absorption spectroscopy, transmission electron microscopy, vibrating magnetometry, Faraday's method and thermal analysis, we studied Al92Ce8 alloy in the glassy, crystalline and liquid states. The cerium in the alloy demonstrates mixed valence behavior with the noticeable portion of tetravalent states. The local order and physical properties of the investigated composition are discussed in the assumption of specific chemical bonding between Al and Ce with partial involvement of 4f-electrons. (C) 2014 Elsevier B.V. All rights reserved

Local chemical order in Al92Ce8 metallic glass: The role of 4f-electrons

The work was partly supported by the Russian Foundation for Basic Research and the Government of Sverdlovsk region (grant nos 13-03-96055-ural and 13-02-96036-ural).Using a combination of the synchrotron X-ray absorption spectroscopy, transmission electron microscopy, vibrating magnetometry, Faraday's method and thermal analysis, we studied Al92Ce8 alloy in the glassy, crystalline and liquid states. The cerium in the alloy demonstrates mixed valence behavior with the noticeable portion of tetravalent states. The local order and physical properties of the investigated composition are discussed in the assumption of specific chemical bonding between Al and Ce with partial involvement of 4f-electrons. (C) 2014 Elsevier B.V. All rights reserved