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[en] On the basis of the adiabatic representation for eigenmodes of the integrated optical multilayer waveguide, differential equations and boundary conditions to vertical distribution of the electromagnetic field in the waveguide are presented. An asymptotic method is applied to smoothly irregular waveguides, and zero approximation parts of differential equations and boundary conditions are determined. Exact expressions are considered for the vertical distribution of the electromagnetic field in a waveguide and for boundary conditions. Finally, the problem is reduced to the solution of a homogeneous system of linear algebraic equations depending on a spectral parameter and to the search for the parameter values
[en] The mathematical and computer modeling of required operation modes of multipurpose isochronous cyclotrons is presented. The considered procedure is based on the calculation of currents in trim coils of correction of the main magnetic field (Ii, i = 1, 2...z) at a certain level of current in the main coil (Imain). A series of numerical and physical experiments on modeling of the main operation mode of the mutipurpose isochronous cyclotron AIC144 (INP PAS, Krakow): accelerated particles are protons (p), extracted proton energy is Eout ∼ 60.3/60.7 MeV, RF-generator frequency is Frf = 26.155/26.25 MHz, confirmed both the necessity of including the evaluation of solution stability into the calculation, and the possibility of successful accelerating of the protons in the whole range of working radii with the allowable phase losses of accelerated protons in the isochronization range of required magnetic field (with decreasing beam current less than 50%) without stopping the cyclotron for performing the additional magnetic measurements
[en] For the first time magnitude corrections were studied for stations network of the National Nuclear Center of the Republic of Kazakhstan for the events happened on the territory of three Central Asia Test Sites - Lop-Nor (China), Pokharan (India), Chagai (Pakistan). Regular underestimating of mb values in REB (Reviewed event bulletin - the catalogue of the International Data Center) by 0.41 (±0.10) in comparison with NEIC (National Event Information Center - the catalogue of the USA Geological Service) and KNDC (Kazakhstan National Data Center) bulletins was noted. Magnitude corrections by NEIC for Borovoye station are close to zero; it allows to consider this station as a main one for magnitude estimations in future. It is recommended to conduct researches on creation of a single regional calibration curve (up to Δ = 2000 km).(author)
[en] The modern condition of researches nonequilibrium (Kolmogorov type) stationary and non-stationary particle distributions with a flux on a spectrum is submitted. On the basis of Boltzmann collision integrals and in Landau form for not relativistic charged particles interacting under Coulomb law in view of static shielding, in homogeneous and isotropic matter by analytical methods and with the help completely conservative finite difference schemes consider formation of nonequilibrium particle distribution functions. It is shown, as the received results can be used for a prediction of behaviour of conductors and semiconductors both with own and with impurity conductivity irradiated with fast-ion beams or laser radiation.