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V. T. Astrelin A. V. Burdakov V. S. Koidan K. I. Mekler P. I. Mel’nikov V. V. Postupaev M. A. Shcheglov 《Journal of Experimental and Theoretical Physics》1998,86(3):489-500
This paper presents the results of experiments on two-stage heating of a dense plasma by a relativistic electron beam in the
GOL-3 facility. A dense plasma with a length of about a meter and a hydrogen density up to 1017 cm−3 was created in the main plasma, whose density was 1015 cm−3. In the process of interacting with the plasma, the electron beam (1 MeV, 40 kA, 4 μs) imparts its energy to the electrons of the main plasma through collective effects. The heated electrons, as they disperse
along the magnetic field lines, in turn reach the region of dense plasma and impart their energy to it by pairwise collisions.
Estimates based on experimental data are given for the parameters of the flux of hot plasma electrons, the energy released
in the dense plasma, and the energy balance of the beam-plasma system. The paper discusses the dynamics of the plasma, which
is inhomogeneous in density and temperature, including the appearance of pressure waves.
Zh. éksp. Teor. Fiz. 113, 897–917 (March 1998) 相似文献
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Marchenko AP Koidan HN Huryeva AN Zarudnitskii EV Yurchenko AA Kostyuk AN 《The Journal of organic chemistry》2010,75(21):7141-7145
It has been experimentally proven that the reaction of 1- or 1,2-disubstituted imidazoles with diorganylphosphorus(III) halides proceeds via initial formation of N-phosporylated imidazolium salts. Treatment of these salts with strong bases results in phosphorylation of the parent imidazoles at the 2- or 5-positions, correspondingly. In a previous case, imidazol-2-ylidenes are formed as intermediates. With both N1 and N3 atoms bearing sterically demanding or/and π-donating groups, deprotonation of 1,3-disubstituted imidazolium salts with NaN(SiMe(3))(2) afforded new stable N-phosphorus-substituted Arduengo-type carbenes. 相似文献
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Krauz V. I. Mitrofanov K. N. Myalton V. V. Grabovski E. V. Koidan V. S. Vinogradov V. P. Vinogradova Y. V. Zukakishvili G. G. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》2010,38(2):92-99
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In many generic combustion models, one finds that a combustionwave will develop with a specific wave speed. However, thereare possible initial temperature profiles which do not evolveinto such waves, but rather die out to the ambient temperature.There can exist, in some models, a clear distinction betweenthose initial conditions that do evolve into combustion wavesand those that do not; this is sometimes referred to as thewatershed initial condition. When fuel consumption is consideredto be negligible, analytical methods can be used to obtain theexact watershed. In this paper, we consider the problem of determiningpseudo-watersheds and ascertaining the relationship betweenthese pseudo-watersheds and the exact watersheds. In the processa novel weight-function approach for infinite spatial domainsis developed. 相似文献
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Marchenko AP Koidan GN Kostyuk AN Tolmachev AA Kapustin EG Pinchuk AM 《The Journal of organic chemistry》2006,71(22):8633-8636
The representative of P,P,P-trichloroylides-5-methyl-2-phenyl-4-(trichlorophosphoranylidene)-2,4-dihydro-3H-pyrazol-3-one-was synthesized. Its constitution was confirmed by 1H, 13C, and 31P NMR spectroscopy and by X-ray analysis. Some chemical properties were studied and compared with ones of P,P,P-trimethylylide-5-methyl-2-phenyl-4-(trimethylphosphoranylidene)-2,4-dihydro-3H-pyrazol-3-one. DFT calculations of the model molecules were carried out. 相似文献
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Anatoliy Marchenko Heorgiy Koidan Anastasiya Huryeva Radomyr Smaliy Yurii Vlasenko Oleksii Gutov Aleksandr Kostyuk 《Heteroatom Chemistry》2014,25(1):1-9
The previously developed intramolecular cyclocondensation of C‐phosphanyl(N‐aryl)formamidines into 3‐H‐1,3‐benzazaphospholes has been successfully extended to 1,3‐diaminobenzene and 1,3,5‐triaminobenzene. Its condensation presents the way to tricyclic and tetracyclic azaphospholes. Their structures were confirmed by spectroscopic methods and key tricyclic and tetracyclic compounds were further characterized by single crystal X‐ray diffraction. 相似文献
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A. V. Arzhannikov V. A. Bychenkov P. V. Kalinin G. V. Kovalenko V. S. Koidan Yu. N. Lazarev K. I. Mekler P. V. Petrov A. V. Petrovtsev 《Journal of Applied Mechanics and Technical Physics》2000,41(3):401-407
The destruction of the surface layer of concrete by a powerful microwave-radiation pulse is studied. The conditions for the
occurrence of shear and spall fractures in concrete at a given depth are found. The range of electrodynamic parameters within
which microwave radiation is the most effective for disintegration of concrete is found. The requirements for a microwave
generator that permit one to study experimentally the force action of electromagnetic radiation on concrete are formulated.
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 41, No. 3, pp. 26–33, May–June, 2000. 相似文献
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