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1.
M. I. Bryzgunov A. V. Bubley A. D. Goncharov V. M. Panasyuk V. V. Parkhomchuk V. B. Reva 《Physics of Particles and Nuclei Letters》2016,13(7):792-795
According to the agreement, the electron cooling system for the NICA booster should be commissioned in late 2015. The degree of completion of various units and components of the installation as of September 2015 is characterized in the present report. Part of the report is devoted to discussing the performance parameters of the installation and the engineering solutions that had to be implemented to achieve such parameters. 相似文献
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Ukrainian Mathematical Journal - We establish sufficient conditions for the convergence of a sequence of solutions of general boundary value problems for systems of linear ordinary differential... 相似文献
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M.?I.?BryzgunovEmail author V.?S.?Kamerdzhiev V.?V.?Parkhomchuk V.?B.?Reva 《Technical Physics》2015,60(8):1227-1233
An electron cooler designed at the Budker Institute of Nuclear Physics for the Cooler Synchrotron COSY (Juelich, Germany) has been put into operation. The aim of this cooling device is to prevent the beam scattering on an internal target up to the maximal energy of the transmitted beam. The device provides cooling in a strong longitudinal magnetic field generated in a high-voltage area. The motion of electrons in the magnetic field considerably improves the kinetics of electron—ion collisions, because their transverse velocity component (which is very high as a rule) does not participate in the process. First experiments on electron beam cooling on energy 200 MeV were made in 2013. Early in 2014, sessions on electron beam cooling to 200, 350, 580, and 1660 MeV were carried out. In other experiments, deuterium beams were cooled down. Experimental data for the cooling time are compared with the respective theoretical predictions. These results may be used in cooling projects for the Nuclotron-based Ion Collider fAcility (NICA), Joint Institute for Nuclear Research, Dubna, Russia, and the Facility for Antiproton and Ion Research (FAIR), Darmstadt, Germany. 相似文献
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Filipe Belarmino de Lima Gessenildo Pereira Rodrigues Juracy Regis de Lucena Júnior Elizete Ventura Rui Fausto Igor Reva Silmar Andrade do Monte 《International journal of quantum chemistry》2020,120(16):e26263
Multi-reference configuration interaction, MR-CI (including extensivity corrections, named +Q), calculations were performed on the S0–S3 states of cyclohexa-2,4-diene-1-thione (thione 24 ) and cyclohexa-2,5-diene-1-thione (thione 25 ), which are thione isomers of thiophenol. Several types of uncontracted MR-CIS and MR-CISD wavefunctions were employed, comprising MR-CI expansions as large as ~365 × 106 configuration state functions. The nature of the studied excited states was characterized. Vertical excitation energies (ΔE) and oscillator strengths (f) were computed. The most intense transitions (S0 → S2 for 24 and S0 → S3 for 25 ) did not change with the wavefunction, although a variation as large as ~1 eV was obtained for the S3 state of 24 , at the highest (MR-CI+Q) level. On the other hand, ΔE changed at most by ~0.56 eV for 25 as the wavefunction changes, at the same level. The S1 state of both thiones was found to have nπ* character and is in the visible region. For 24 , S2 and S3 are ππ* and nπ* states, respectively, while for 25 the reverse order is obtained. S2 and S3 are in the range ~3.5 to 5.2 eV, again at the highest level. It is the first time that the excited states of the title molecules are studied. The computed results agree with the experimental onset of photoreactions of thiones 24 and 25 found by Reva et al (Phys. Chem. Chem. Phys., 2015 , 17, 4888). 相似文献
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Bryzgunov M. I. Bubley A. V. Denisov A. P. Goncharov A. D. Parkhomchuk V. V. Panasyuk V. M. Reva V. B. Kremnev N. S. Putmakov A. A. Belikov O. V. Gorchakov K. M. Skorobogatov D. N. Chekavinskiy V. A. Bekhtenev E. A. Zharikov A. A. Karpov G. V. Kondaurov M. N. Gusev I. A. Senkov D. V. 《Physics of Particles and Nuclei Letters》2020,17(4):425-428
Physics of Particles and Nuclei Letters - In order to achieve the design luminosity in the NICA collider, it is planned to equip it with both stochastic and electron cooling. The electron-cooling... 相似文献
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We obtain an existence theorem for monotone positive solutions of nonlinear second-order nonlinear differential equations via principal and nonprincipal solutions of the corresponding homogeneous equation. 相似文献
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