Design of flat ironless undulators
Design of flat ironless undulators
А.F. Aleksandrov, V.L. Vesnin, and V.А. Kubarev
А flat magnetic undulator formed bу pairs of conductors carrying reverse currents,is considered. Using the Green function technique, the undulator fields are calculated and their dependency on the undulator geometric dimensions is investigated.
Show AbstractModeling СО oxidation processes on dissociation of water in plasmochemical systems with allowance for vibrational excitation of nitrogen molecules
Modeling СО oxidation processes on dissociation of water in plasmochemical systems with allowance for vibrational excitation of nitrogen molecules
А.А. Kuzovnikov, А.V. Ponomareva, and V.S. Sviridkina
The results ofmathematical modeling of СО oxidation processes in plasmochemical systems containing СО, 02 , Н20 and N2 with allowance for the formation of vibrationally excited nitrogen molecules in а plasma and for their participation in chemical processes have been presented. The calculations have shown that the use of а nonequilibrium plasma ($T_е$=1eV,$Т_0$= 700К, $n_e/n_0=5\cdot10{-6}$)in modeling carbon monoxide oxidation processes with allowance made for vibrational excitation of nitrogen molecules does not decrease the degree of СО oxidation, but leads to an increase in the СО oxidation process time Ьу an order of magnitude. The quantity of forming nitrogen oxides and dioxides NO and N02 is insignificant.
Show AbstractElectron absorption spectra and photochemical properties of а new compound, photoЬiotin
Electron absorption spectra and photochemical properties of а new compound, photoЬiotin
К.G. Вlinova, V.I. Yuzhakov, S.N. Shcherbo, and М.F. Тurchinskii
Electron absorption spectra of а new first synthesized compound, photoЬiotin, have been investigated in relation to the рН value and to an exposure dose of an aqueous solution of this compound. Optimal conditions of labeling nucleic acids with the new photoblotin have been determined. The proposed method of labeling nucleic acids proved to bе very sensitive. The spectral and photochemical characteristics ofthe new photoblotin are compared with the characteristics of biotins investigated earlier.
Show Abstractlnfluence of polarization state of ferroelectric films on electrophysical properties of silicon-ferroelectric structures
lnfluence of polarization state of ferroelectric films on electrophysical properties of silicon-ferroelectric structures
N.L. Levshin, А.N. Nevzorov, and А.G. Petrukhin
The influence of the polarization state of а ferroelectric on 1the voltage-capacitance and voltage-current characteristics of metal-ferro.electric film-silicon structures has been studied. The thermofield processing has b 1een demonstrated to cause not only the repolarization of the ferroelectric but a1so the recharging of electron traps. The mass spectroscopy method was used to record the desorption of various atoms and molecules from the surface of the structure on heating above the phase transition temperature.
Show AbstractOn the problem of dynamic diffraction of X-Rays in Bragg scheme bу а crystal in which ultrasonic wave is excited.
On the problem of dynamic diffraction of X-Rays in Bragg scheme bу а crystal in which ultrasonic wave is excited.
I.R. Prudnikov
The proЫem of dynamic X-ray diffraction according to Brag;g Ьу а crystal in which ultrasonic wave is excited has been considered. The four-wave approximation is used to oЪtain an analytical solution to the proЫem for X-ray-acoustic resonance $k_s\simeq\Delta K_0$, where k, is the ultrasonic wave vector and $\Delta K_0$ is the minimum splitting of the two-wave dispersion surface in diffraction Ьу an ideal crystal). Based on the oЪtained solution, the dependence of tbe structure of the curve of diffraction reflection on the amplitude of ultrasound has been examined.
Show AbstractFrequency of geomagnetic field inversions as а function of solar system position in the Galaxy
Frequency of geomagnetic field inversions as а function of solar system position in the Galaxy
К.V. Semenkov
The connection between the position of the Sun in the Galaxy and geodynamic phenomena is studied. The proЫem of the Sun's motion in the Galaxy has been solved without taking the influence of spiral arms into account. The Sun's orblt has been calculated for а particular form of the Galaxy potential. The Fourier analysis of the frequency of inversions of the magnetic field of the Earth as а function of time has been carried out. It has been shown that the frequency of inversions of the magnetic field of the Earth increased when the Sun left the spiral arm; the geomagnetic activity increased when the Sun either intersected the Galaxy plane or was at minimum separation from its center.
Show AbstractPolarization of cosmic microwave background radiation
Polarization of cosmic microwave background radiation
М.V. Sazhin and V.V. Shul'ga
The formation of the cosmic microwave background radiation polarization in observations of standard recombination is discussed. The polarization level in observations using antennas with different sizes of directivity patterns over the angle range varying from 3 to 15°С has Ъееn calculated. The formation ofpolarization was calculated in models with different kinds of spectra (for the spectrum index n = 1 and 1.5) and with different kinds of disturbances. Scalar disturbances and gravitational waves have Ъееn considered separately. The degree of the cosmic microwave background radiation polarization has bееn calculated.
Show AbstractAbout the gyromagnetic ratio of celestial bodies
About the gyromagnetic ratio of celestial bodies
V.I. Grigor'ev and Е.V. Grigor'eva
The question of the physical roots of the Blackett relation, i.e., of the assertion that the ratios of magnetic moments and angular momenta of all celestial bodics are approximately the same, has been discussed. Estimates related to the part of magnetic moments caused bу the baroelectric effect have been obtained.
Show AbstractStatistical characteristics of а scattered field reflected from an inhomogeneous absorbing ionospheric layer
Statistical characteristics of а scattered field reflected from an inhomogeneous absorbing ionospheric layer
V.D. Gusev, Е.G. Mikhailova, and L.I. Prikhod'ko
The spectral characteristics of а scattered field reflected from an inhomogeneous absorblng ionospheric layer have been considered. Under single-scattering approximation an exact and an approximate expressions for tЬ.е angular power spectrum on leaving the ionosphere, suitaЫe for vertical and inclined sensing, have been obtained. The structure of the scattered field power spectra is analyzed for different parameters of inhomogeneous ionospheric layers.
Show AbstractOn directivity of radiation of dispersing tsunami waves produced bу asymmetric sources
On directivity of radiation of dispersing tsunami waves produced bу asymmetric sources
М.А. Nosov and N.К. Shelkovnikov
The radiation directivity of tsunami produced bу vertical shoves of the ocean floor in rectangular sources is analyzed within the framework of the linear theory of waves on the basis of numerical calculations of integrals. It has been found that the duration of swab shove of the ocean floor influences the wave radiation directivity. It has been shown that the directivity of energy radiation is preserved with distance from the source, whereas the wave amplitude distribution in the azimuthal angle tends to bе isotropic.
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