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1.
We consider the method of plasma separation of spent nuclear fuel in a system with an azimuthal magnetic field and the electric potential produced by electrodes located in a magnetized plasma. The results of calculation of trajectories of ions simulating uranium and the first peak of its fission products in the oneparticle approximation are described. The effect of the initial position and the initial velocity of ions on their trajectories is analyzed. The conditions ensuring the spatial separation of ions in the groups of masses admissible for practical realization are specified; it is shown that currents on the order of 100 kA through the central conductor and electrostatic potentials on the order of 1 kV are required for this purpose. 相似文献
2.
R. Kh. Amirov N. A. Vorona A. V. Gavrikov G. D. Liziakin V. P. Polistchook I. S. Samoylov V. P. Smirnov R. A. Usmanov I. M. Yartsev 《Physics of Atomic Nuclei》2015,78(14):1631-1634
One of the key problems in the development of plasma separation technology is designing a plasma source which uses condensed spent nuclear fuel (SNF) or nuclear wastes as a raw material. This paper covers the experimental study of the evaporation and ionization of model materials (gadolinium, niobium oxide, and titanium oxide). For these purposes, a vacuum arc with a heated cathode on the studied material was initiated and its parameters in different regimes were studied. During the experiment, the cathode temperature, arc current, arc voltage, and plasma radiation spectra were measured, and also probe measurements were carried out. It was found that the increase in the cathode heating power leads to the decrease in the arc voltage (to 3 V). This fact makes it possible to reduce the electron energy and achieve singly ionized plasma with a high degree of ionization to fulfill one of the requirements for plasma separation of SNF. This finding is supported by the analysis of the plasma radiation spectrum and the results of the probe diagnostics. 相似文献
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A. V. Gavrikov 《Russian Mathematics (Iz VUZ)》2016,60(2):14-18
Directed graphs are mathematical models of discrete systems. T-irreducible extensions are widely used in cryptography and diagnosis of discrete systems. A polygonal origraph is a digraph obtained from a circuit by some orientation of its edges. We propose an algorithm to construct a T-irreducible extension of a polygonal graph. 相似文献
5.
A. A. Kotov L. A. Vaishnene V. G. Vovchenko Yu. A. Gavrikov V. V. Polyakov M. G. Tverskoi O. Ya. Fedorov T. Fukahori Yu. A. Chestnov A. V. Shvedchikov A. I. Shchetkovskii 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(6):809-811
The results of measuring total cross sections for proton-induced fission of natPb, 209Bi, 232Th, 233U, 235U, 238U, 237Np, and 239Pu nuclei at proton energies from 200 to 1000 MeV are reported. The measurements were carried out in steps of ≈100 MeV. Complementary fission fragments were detected in coincidence by two parallel-plate avalanche gas counters placed in the beam line on both sides of the thin target close to it. Energy and isotope dependences of the fission cross sections are analyzed. 相似文献
6.
A.S. Komolov S.A. Komolov E.F. Lazneva A.A. Gavrikov A.M. Turiev 《Surface science》2011,605(15-16):1452-1456
The results on the electronic structure of the unoccupied electronic states of the polycrystalline SnO2 in the energy range from 5 eV to 25 eV above the Fermi level are presented. The modification of the electronic structure and of the surface potential upon deposition of the ultrathin films of copper phthalocyanine (CuPc) and of perylene tetracarboxylic acid dianhydride (PTCDA) film onto the SnO2 surface were studied using the very low energy electron diffraction (VLEED) method and the total current spectroscopy (TCS) measurement scheme. A substantial attenuation of the TCS signal coming from the SnO2 surface was observed upon formation of a 1.5–2 nm thick organic deposit layer while no new spectral features from the deposit were distinguishable. It was observed that the electronic structure typical for the organic films was formed within the organic deposit thickness range from 2 nm to 7 nm. The interfacial charge transfer was characterized by the formation of the polarization layer up to 5 nm thick in the organic films. The PTCDA deposition on SnO2 was accompanied by the negative charge transfer onto the organic layer and to the 0.65 eV increase the surface work function. At the CuPc/SnO2 interface, the negative charge was transferred to the SnO2 surface and the overall surface work function decreased by 0.15 eV. 相似文献
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A. M. Bishaev A. I. Bugrova M. B. Gavrikov M. V. Kozintseva A. S. Lipatov V. V. Savel’ev A. S. Sigov P. G. Smirnov I. A. Tarelkin P. P. Khramtsov 《Technical Physics》2013,58(4):498-504
The toroidal current emerging after the injection of a plasmoid through the magnetic shell of the Trimyx-3M (microwave) multipole trap is measured using the Rogowski loop. This current is due to diamagnetism of the plasma. The relation between the diamagnetic current and the maximal plasma pressure produced at the magnetic field separatrix is obtained. It is shown hence that magnetic measurements in a multi-pole trap for a known concentration make it possible to determine the plasma temperature in the trap and the energy confinement time. 相似文献
9.
Petrosyants S. P. Ilyukhin A. B. Gavrikov A. V. Efimov N. N. 《Russian Journal of Coordination Chemistry》2018,44(12):745-754
Russian Journal of Coordination Chemistry - The reactions of thiocyanates Ln(NCS)3 ? 6H2O (Ln = Y, Eu, and Tb) with 2,4,6-tris(2-pyridyl)-s-triazine (Tptz) in МеОН,... 相似文献
10.
为提高土壤多元素同时检测的效率,采用超级微波消解-电感耦合等离子体发射光谱法测定土壤中钾、钠、钙、镁、铜、铁、锰、锌、磷、硫、硼、砷、镉、铬、铅、钴、镓、锂等18种元素含量。比较了超级微波消解、常规微波消解和电热板消解的处理效果,采用超级微波消解法对样品进行前处理,并优化了消解条件。在最优条件下,各元素的检出限在0.05~20 mg/kg,加标回收率在86.2%~107.5%,RSD在0.1%~3.0%,方法准确度及精密度可以满足多元素同时测定的需求,且该方法具有简单、快速、成本低、用酸量少、重现性好等特点。 相似文献