SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25456 full-text translations 14926 English PDFs 22540 abstracts
Showing 50 of 25456 papers
This paper describes a high-voltage stabilizer designed for electrostatic deflection in studies of a 250 kV electron beam. The stabilizer uses a parallel regulating circuit with a GMI-83 pulse tetrode and a differential three-stage DC amplifier, allowing the deflecting voltage to be set between 9 an…
This paper describes the design and testing of a compact pulsed-voltage generator intended to power the accelerating tube of a borehole neutron generator. The generator was designed to deliver negative pulses of 120 kV at 50 Hz, using inductive rather than resistive charging and isolation elements t…
The paper analyzes transient processes in a two-loop pulse circuit used to generate pulsed magnetic fields by charging a capacitor bank from an uncontrolled rectifier through an inductive charging circuit and discharging it through a separate inductive-resistive circuit. Under the practical assumpti…
This paper examines why the depolarization degree of Raman lines corresponding to symmetric C=C stretching vibrations differs between hydrocarbons with conjugated double bonds in open chains and in cyclic systems. Using measured Raman depolarization values for substituted dienes and cyclic dienes, t…
This paper examines Dirac’s proposal that the gravitational constant varies with cosmic time and argues that, if conservation of total energy and charge is imposed together with an empirical relation between particle number and world time, the variation should differ from Dirac’s law. The author der…
This paper examines the use of mercury-filled TR-85/15 thyratrons for switching high-current pulses whose durations exceed the capabilities of conventional pulsed thyratrons and ignitrons. The authors describe experimental tests in which capacitor discharge circuits were used to measure current over…
The article proposes an ion switch circuit for unipolar pulsed excitation of accelerator electromagnets using a capacitor bank. It addresses energy losses and practical limitations in existing capacitor recharge schemes and in mechanical polarity switching at high pulse frequencies. The proposed arr…
This note studies the classification up to isomorphism of two-dimensional formal abelian groups over an algebraically closed field of characteristic p greater than zero, using Dieudonné’s equivalence between formal abelian groups and modules over a complete topological ring. It reduces the problem t…
This paper examines limitations on increasing beam current in high-voltage pulsed electron accelerator tubes, with emphasis on focusing constraints caused by space charge in multielectrode sectionalized structures. Using relations from electron-gun theory, including the three-halves-power law and Pi…
This paper examines the reflection of a weak discontinuity in transonic flow from a sonic line when the jump in velocity derivatives has the sign not treated in earlier work. Using the Euler Tricomi equation in hodograph variables, the authors analytically continue the incident singular solution, an…
This paper examines the design, calculation, and fabrication of vacuum systems for electron accelerators, emphasizing the influence of chamber construction and residual gas pressure on accelerator performance. It discusses material choices for vacuum chambers, requirements for conductive coatings, p…
This paper describes a liquid level indicator intended for high-precision alignment of large machine foundations, especially in cramped spaces or locations where a conventional geodetic level is difficult to use. The instrument is based on communicating vessels connected by hoses, with water as the …
This study examines the free-radical polymerization of vinyl ethyl sulfone, a reactive but previously little studied vinyl sulfone monomer of potential practical interest. Purified monomer was polymerized in bulk and in solution using azo and peroxide initiators, with additional trials using organob…
This paper describes a method for measuring the absolute amplitude of a pulsed magnetic field with a ballistic galvanometer connected to a test coil. The approach uses the galvanometer response to the charge produced during a controlled time interval from the onset of the pulse, varying this interva…
This note studies extinction and limiting behavior in continuous-time inhomogeneous branching processes, where particle reproduction probabilities depend on time and are described through a generating-function differential equation. It derives an integral representation for the generating function a…
A device is described for measuring the median surface of the magnetic field in an accelerator by locating points in the magnet gap where the radial field component is zero. The instrument uses a permalloy ferroprobe sensor mounted on a displacement mechanism with radial and vertical adjustment, a r…
This paper studies model representations for non-self-adjoint bounded operators of class Omega whose spectrum is real and whose non-Hermiticity has finite rank. It introduces generalized elements in a rigged Hilbert space constructed from a smooth function space transported by a unitary equivalence …
This paper analyzes uniformly curved rectangular waveguides periodically loaded with diaphragms as slow-wave structures for a cyclic electron accelerator based on a betatron magnetic system. Using an admittance matching approximation with specified boundary fields, the authors derive dispersion equa…
This paper examines the calculation of spatial harmonic amplitudes in rectangular diaphragm-loaded waveguides operating in the pi-oscillation regime, motivated by the use of higher harmonics in microwave slow-wave devices. The authors formulate the field matching problem as an infinite system of equ…
This paper examines electron bunching in a synchrotron by analogy with microwave electron devices, focusing on radial phase oscillations while neglecting betatron effects and interelectron repulsion. In a kinematic approximation, the phase motion is reformulated from an elliptic integral into canoni…
This paper develops an analytic description of radial phase motion of electrons in a synchrotron using energy conservation and the phase of an electron relative to the traveling wave, rather than the usual separation into equilibrium, slow, and fast motions. Starting from coupled equations for energ…
The paper examines the magnetic field configuration that maximizes charge retention in a betatron chamber when the beam’s own magnetic field and space charge are taken into account. Starting from a nonlinear field equation for the relativistic magnetic potential, it introduces a linearized form and …
This paper reports the start-up and operating results of a pulsed two-chamber 25 MeV stereobetatron built at the Scientific Research Institute of the Tomsk Polytechnic Institute to increase accelerator radiation intensity. It describes the principal pulsed power, injection, orbit expansion, and beam…
This paper describes the design, commissioning, and initial operation of a 5 MeV electron microtron based on a constant magnetic field and fixed radio-frequency accelerating system. It outlines the accelerator components, including the electromagnet, vacuum chamber, toroidal resonator, RF line, magn…
This paper examines how radiation induced lattice defects affect the thermodynamic potential, solubility, and dissolution kinetics of crystals. A kinetic argument relating dissolution rate to solution undersaturation is combined with experiments on X-ray, neutron, and gamma irradiated alkali halide …
This paper investigates how irradiation affects contact melting in binary metal systems, where mutual dissolution at the interface produces low melting solid solutions below the melting points of the pure components. Using paired irradiated and unirradiated specimens of metals including tin, bismuth…
This paper reports measurements of photoneutron reaction thresholds in natural silicon isotopes, with particular attention to the difficult case of silicon-28, where background neutrons, short residual half-life, and small near-threshold cross sections limit standard methods. The authors use a time-…
This study examines the energy distribution of neutrons accompanying the bremsstrahlung gamma beam of a 25 MeV betatron, a problem relevant to experiments affected by mixed radiation fields. Domestic Ya-2 nuclear photoemulsion plates were irradiated at a fixed gamma dose and analyzed by measuring re…
Fast neutron backgrounds produced during operation of a 25 MeV betatron are investigated because such neutrons can affect photonuclear measurements and contribute additional dose in medical or biological irradiation. The study uses domestic nuclear photoemulsions to register recoil proton tracks, wi…
The study investigates the angular distribution of photoneutrons emitted from Ta181 and Bi209 under bremsstrahlung irradiation, a measurement relevant to assessing mechanisms of photonuclear reactions. Using a 24 MeV betatron as the gamma-ray source, the authors irradiated tantalum and bismuth sampl…
This paper examines whether the width of the giant resonance in photoneutron reactions can indicate the filling of nuclear energy levels, in addition to its known relation to nuclear deformation and closed neutron shells. The authors measured threshold energies and photoneutron yield curves for sele…
Elastic scattering of 10.3 MeV deuterons by helium-4 is analyzed using a rectangular complex optical potential, motivated by earlier applications to proton scattering. Differential cross sections are calculated by the Chase and Rohrlich method and compared with published experimental angular distrib…
Rodimov proposes an alternative wave equation for quantum particles based on the group velocity rather than the phase velocity used in the usual Schrödinger equation. The paper derives this “v-equation” from a modulated wave relation, applies it to the hydrogen atom, and shows that for s-states a te…
The paper estimates relative intensities, or decrements, of selected N III recombination lines in planetary nebula spectra, addressing the limited atomic data available for heavy element recombination spectra. It formulates and solves stationarity equations for several N III terms at electron temper…
This note studies the structure of n-dimensional primitive parallelohedra of the first type, using Selling frames, circumscribed simplexes, and operations of affine transformation and stretching along zones of edges. It proves that any two such parallelohedra of the same dimension are related by the…
This study examines how induced radioactivity from Fe-59 affects the atmospheric corrosion of Armco iron and carbon steel-2 under conditions of 100 percent relative humidity. Samples activated by neutron irradiation were compared with inactive controls over periods up to 30 days, with corrosion asse…
The paper critiques the permanence of ocean basins and the hypothesis of large-scale continental submergence, arguing that sediment thickness, isostasy, submarine canyons, and historical land connections are better explained by changes in ocean level and by removal or displacement of the sialic shel…
This paper examines rock destruction in vibratory-rotary drilling with an annular face, focusing on how vibration parameters, axial load, and bit peripheral speed interact in hard rocks. It proposes a mechanism based on oblique impact of bit cutters after separation from the face, then tests this in…
This paper examines why boreholes deviate strongly during shot drilling in some apparently homogeneous hard rocks, especially where deviation cannot be explained by shot accumulation, drill-string instability, or models developed for hard-alloy bits. Using observations from the Bakal deposit and ind…
This paper examines laboratory methods for determining the relative subsidence, or collapsibility, of loess-like soils, a key parameter in calculating foundation settlement and selecting anti-subsidence measures. It critiques prevailing standard procedures, especially determinations under a fixed pr…
This paper examines the distribution, structure, lithological and mineralogical character, and age of the weathering crust developed on Paleozoic rocks in the Tomsk area. Drawing on outcrop observations, borehole sections, and comparison with earlier geological and mineralogical studies, it shows th…
This paper reports the discovery of trilobites of the family Oryctocephalidae in Cambrian deposits near Sukhaya Erba on the Batenevsky Ridge, an area previously known for archaeocyath and trilobite assemblages of the Obruchev, or polycyathid, horizon. On the basis of geological mapping around Mt. Do…
This paper revises the stratigraphy of Late Precambrian and Lower Cambrian deposits in the Krasnoyarsk Ridge, especially the middle Mana River area, using geological mapping and extensive fossil collections from trilobites, archaeocyaths, algae, brachiopods, and other groups. It argues that several …
This paper examines the lithologic and genetic facies variability of Devonian deposits in the Rybinsk Depression, with attention to implications for stratigraphic interpretation and possible oil and gas reservoirs. Using facies maps, thickness patterns, mineralogical data, bedding features, pebble c…
The paper formulates a general theory of kinetic phenomena in ideal crystals where current carriers have anomalously low mobility due to strong electron, phonon coupling and small-polaron localization. Starting from general expressions for kinetic coefficients, it develops a modified resolvent expan…
This paper examines the Precambrian and Cambrian stratigraphy and tectonic structure of the Cheposh reference area in the Gorny Altai, focusing on the Baratal, Manzherok, Kayanchin, and Ust-Sema formations. Using detailed mapping, structural observations, lithologic subdivision, and paleontological …
This paper reassesses the causes of unsuccessful oil and gas exploration in the South Minusinsk Basin by focusing on the reservoir properties of Devonian rocks. Drawing on porosity measurements from 1,434 samples, core data, well inflow observations, and permeability calculations, it argues that mon…
This paper examines the importance of monitoring observations in hydrogeochemical prospecting for ore deposits, focusing on temporal changes in heavy metal contents of natural waters. Drawing on field observations from Rudny Altai, the Tomsk area, Western Siberia, and Transbaikalia, the authors show…
This paper examines the hydrogeochemical conditions of the Kharadzhul-Butrakhta ore field in the Western Sayan as a basis for prospecting sulfide mineralization. Based on a 1958 survey of natural waters, mine waters, boreholes, rocks, and field hydrochemical parameters, it relates water composition,…
