The optical properties of holographic kinoforms are described. It is shown that paraxial designs are not adequate for f/Nos. less than F/10. A nonparaxial design is introduced that retains the high diffraction efficiency of the paraxial designs, yet also produces an unaberrated diffracted wavefront for the design wavelength. Aberration calculations and computer calculations, based on the Huygen...

The normal-incidence efficiencies of two laminar gratings and the reflectances of two parabolic mirrors with matching multilayer coatings were measured by monochromatic synchrotron radiation and were compared with modeling calculations. These optics were developed for the Extreme-Ultraviolet Imaging Spectrometer to be launched on the Japanese Solar-B mission. Each optic has two sectors coated w...

Neutrino induced reactions on 12 C, an ingredient of liquid scintillators, have been studied in several experiments. We show that for currently available neutrino energies, E ν ≤ 300 MeV, calculated exclusive cross sections 12 C gs (ν, l) 12 N gs for both muon and electron neutrinos are essentially model independent, provided the calculations simultaneously describe the rates of several other r...

The paper presents parallel version of TRQR code, intended for ion source plasma simulation. The code is written using particle decomposition approach, and enables plasma potential, charge density, ion extraction current, etc. calculations. Parallelisation was done using widely accepted MPI platform. Additionally, the code has been rewritten and optimised in order to achieve better efficiency. ...

Multigrid schemes based on high order compact discretization are developed for convection-diffusion problems. These multigrid schemes circumvent numerical oscillations and instability, while also yielding higher accuracy. These instabilities are typically exacerbated by the coarser grids in multigrid calculations. Our approach incorporates a 4th order compact formulation for the discretization,...

Nowadays the best graphic cards thanks to specialized operations and inner parallelism dispose power tens times exceed than typical CPU. It is necessary to create realistic visualization of real time. Since a certain time increasing popularity gain use of this power in scientific calculations made till now on clusters. One of this application is interactive simulation of real time on GPU. It gi...

In an induction heater for heating of aluminum billets, the main reason for using high-temperature superconducting (HTS) tapes instead of conventional copper conductors is to reduce the large power losses in the induction coil. In this work we present how to calculate the different loss contributions of an induction heater based on HTS tapes. Calculations of these losses are used in the design ...

The photoionization and fragmentation of octadecane were investigated with infrared laser desorption/tunable synchrotron vacuum ultraviolet (VUV) photoionization mass spectrometry (IRLD/VUV PIMS) and theoretical calculations. Mass spectra of octadecane were measured at various photon energies. The fragment ions were gradually detected with the increase of photon energy. The main fragment ions w...

In this paper we discuss the implementation of parallel multigrid methods on unstructured locally refined meshes for 2D linear elasticity calculations. The problem of rebalancing the workload of the processors during execution of the program is discussed in detail and a load balancing algorithm suited for hierarchical meshes is proposed. For large problems the efficiency per multigrid iteration...

The purpose of this paper is to employ an alternative approach to reconstruct the standard variational iteration algorithm II proposed by He, including Lagrange multiplier, and to give a simpler formulation of Adomian decomposition and modified Adomian decomposition method in terms of newly proposed variational iteration method-II (VIM). Through careful investigation of the earlier variational ...