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31.
宁成 李正宏 华欣生 徐荣昆 彭先觉 许泽平 杨建伦 郭存 蒋世伦 丰树平 杨礼兵 晏成立 宋凤军 V.P.Smirnov Yu.G.Kalinin A.S.Kingsep A.S.Chernenko E.V.Grabovsky 《物理学报》2004,53(7):2244-2249
利用铝丝和钨丝混合编制的丝阵作为Z箍缩的负载,在俄罗斯Kurchatov研究所的S300强流装置上对其Z箍缩过程进行了实验研究,并与纯铝丝阵和纯钨丝阵的实验结果进行了比较.不同材料组成的丝阵的Z箍缩x射线能谱之间有明显差异,混编丝阵的铝K壳层的x射线辐射强度比纯铝丝阵的弱,在纯钨丝阵Z箍缩中没有发现波长小于1.6nm的线辐射.混编丝阵Z箍缩的x射线发光区域比纯铝丝阵的小,但比纯钨丝阵的大,混编丝阵的x射线产额比纯铝丝阵的大,但比纯钨丝阵的略低.在驱动电流为2.5—2.8MA条件下,Z箍缩的径向收缩比为4—5,x射线辐射脉冲脉宽为25ns左右,峰值为0.3—0.5TW,总能量为10—20kJ.激光探针的阴影像显示了丝阵等离子体形成的细致过程,还表明了等离子体的边界面不够清晰,其不稳定性有明显的发展,内部有丰富的结构.
关键词:
Z箍缩
混编丝阵
S300强流装置 相似文献
32.
I. V. Kalinin E. Kats M. Koza V. V. Lauter H. Lauter A. V. Puchkov 《JETP Letters》2008,87(11):645-648
Evidence of a superfluid liquid phase present in polycrystalline helium at a temperature of 0.2 K and a pressure of 51 bar has been obtained by means of inelastic neutron scattering. The superfluid component is absent at a temperature of 0.6 K and the same pressure. Thus, a “solid helium-superfluid helium” phase transition has been discovered. The sample of solid helium in a porous medium (silica aerogel) has been prepared with the use of a capillary blocking technique. The shape of the structure factor of the superfluid phase indicates the presence of clusters or the effects of a restricted geometry. The results may be used to explain the nonclassical rotational inertia phenomenon in solid helium (often referred to as supersolidity, Nature, 2004). 相似文献
33.
Rodolfo Sánchez Angela Braeuning-Demian Jan Glorius Siegbert Hagmann Pierre-Michel Hillenbrand Anton Kalinin Thomas Köhler Yuri A. Litvinov Nikolaos Petridis Shahab Sanjari Uwe Spillmann Thomas Stöhlker 《X射线光谱测定》2020,49(1):33-36
The atomic physics collaboration SPARC is a part of the APPA pillar at the future Facility for Antiproton and Ion Research. It aims at atomic-physics research across virtually the full range of atomic matter. An emphasis of this contribution are the atomic physics experiments addressing the collision dynamics in strong electro-magnetic fields as well as the fundamental interactions between electrons and heavy nuclei at the HESR. Here we give a short overview about the central instruments for SPARC experiments at this storage ring. 相似文献
34.
J. Fedotova J. Kalinin A. Fedotov A. Sitnikov I. Svito A. Zaleski A. Jablonska 《Hyperfine Interactions》2005,165(1-4):127-134
The effect of oxygen-containing ambient arising at sputtering of granular nanocomposites (Fe0.45Co0.45Zr0.10)
x
(Al2O3)1−x
(30 at.%≤x≤65 at.%) on their magnetic state and phase composition has been investigated. It was shown that the presence of oxygen resulted
in the formation of oxide shells preventing the ferromagnetic interaction between Co0.45Fe0.45Zr0.10 nanoparticles and also the formation of metallic percolative net beyond the percolation threshold (as opposed to the films
prepared in pure argon atmosphere). 相似文献
35.
A. M. Denisov E. V. Zakharov A. V. Kalinin V. V. Kalinin 《Differential Equations》2009,45(7):1034-1043
We consider numerical methods for solving inverse problems that arise in heart electrophysiology. The first inverse problem
is the Cauchy problem for the Laplace equation. Its solution algorithm is based on the Tikhonov regularization method and
the method of boundary integral equations. The second inverse problem is the problem of finding the discontinuity surface
of the coefficient of conductivity of a medium on the basis of the potential and its normal derivative given on the exterior
surface. For its numerical solution, we suggest a method based on the method of boundary integral equations and the assumption
on a special representation of the unknown surface. 相似文献
36.
Kirill T. Kalinin Dr. Nikita G. Sedush Petr V. Dmitryakov Prof. Sergei N. Chvalun 《ChemistryOpen》2020,9(10):1027-1032
The kinetic of D,L-lactide polymerization in presence of biocompatible zirconium acetylacetonate initiator was studied by differential scanning calorimetry in isothermal mode at various temperatures and initiator concentrations. The enthalpy of D,L-lactide polymerization measured directly in DSC cell was found to be ΔH=−17.8±1.4 kJ mol−1. Kinetic curves of D,L-lactide polymerization and propagation rate constants were determined for polymerization with zirconium acetylacetonate at concentrations of 250–1000 ppm and temperature of 160–220 °C. Using model or reversible polymerization the following kinetic and thermodynamic parameters were calculated: activation energy Ea=44.51±5.35 kJ mol−1, preexponential constant lnA=15.47±1.38, entropy of polymerization ΔS=−25.14 J mol−1 K−1. The effect of reaction conditions on the molecular weight of poly(D,L-lactide) was shown. 相似文献
37.
E. T. Apasov B. A. Dzhetigenov E. V. Shepelev Yu. A. Strelenko A. V. Kalinin 《Russian Chemical Bulletin》1993,42(4):703-706
Reactions ofm- andp-dinitrobenzenes witht-BuNHMgBr andt-BuNHLi were studied. The reactions afford azo- and azoxy-derivatives and products of nucleophilic substitution.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 739–741, April, 1993. 相似文献
38.
A. P. Voznyakovskii A. V. Kalinin M. V. Mokeev L. V. Agibalova E. N. Vlasova 《Russian Journal of Applied Chemistry》2012,85(7):1090-1094
The method was developed for surface defunctionalization of detonation nanodiamonds by substitution of a perfluorinated organic radical for hydroxyl and carboxyl groups. Size-mass distributions of modified particles of detonation nanodiamonds in water and toluene were studied 相似文献
39.
A. Yu. Bordanovskii A. A. Volkov D. K. Elumahov V. P. Efremov A. Yu. Kalinin A. V. Korablev A. N. Krinitsyn V. I. Kryshkin N. V. Kulagin V. V. Skvortsov V. V. Talov L. K. Turchanovich 《Physics of Atomic Nuclei》2016,79(4):481-487
Cross sections for the production of high-transverse-momentum charged hadrons in proton–nucleus interactions at the incident-proton energy of 50 GeV were measured with the aid of the FODS double-arm spectrometer. Single hadrons (charged pions and protons) emitted at a c.m. angle of about 90° and high-effective-mass pairs of hadrons flying apart at a c.m. angle of 180° were detected simultaneously. Results on the production of single hadrons are presented. 相似文献
40.
V.S. Litvin V. A. Trunov A. P. Bulkin V. A. Ul’yanov V. A. Solovei M. R. Kolkhidashvili S. I. Kalinin R. A. Sadykov E. A. Koptelov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2010,4(6):873-878
The Gorizont time-of-flight neutron reflectometer—small-angle spectrometer has been designed, manufactured, and assembled to operate with the IN-0 6 pulsed neutron source. The instrument has a vertical neutron scattering plane enabling research on liquid surfaces and interfaces. Model calculations of neutron spectra, beam profiles, and spectrometer resolutions have been performed via the Monte Carlo method. The spectrometer operates at wavelengths from 1.5 to 9 Å and ensures measurements in the momentum-transfer range of 0.003—1.5 Å-1. 相似文献