Materials Literature
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Motor circuit analysis techniques involve the use of low voltage, frequency-based and high voltage turn and insulation to ground tests. These methods primarily rely upon circuit inductance, capacitance and impedances as well as insulation to ground capacitive measurements. In this paper the common methods will be outl…
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Summary form only given. Two Ar gas-puff experiments, each using loads consisting of two annuli and a center jet, were recently performed on Sandia National Laboratories' Z machine. These shots had the same load except that one of them (Z2603) employed a Xe dopant of 0.8% by number in the jet, which was not present in…
Laser-triggered vacuum switches (LTVS) are used for low-jitter, low-inductance, synchronized high current pulsed-power switching. Single-pulse laser irradiation (UV, visible, or IR) heats a target cathode material, ablating the cathode surface and creating a plasma within the gap. UV irradiation may additionally seed…
Change in hardness and microstructure during porcelain firing simulation in a Pd-Ag-In-Au metal-ceramic alloy was examined by observing the change in hardness, crystal structure and microstructure. In the as-cast specimen, the matrix was composed of the Pd3Ga phase(f.c.t.), and the particle-like structures were compos…
Article is devoted to check of adequacy of the piezoelectric analysis by the finite-elements method at simulation of Langevin transducers. The coincidence of the modeling results the distribution of vibration amplitude variously combined and piezoelectric elements in the form of several disks with the data obtained by…
This paper presents the analysis of application of strip gratings on dielectric substrates as output couplers for submillimeter lasers. The coupler transmittance characteristics was calculated by FDTD method and compared with experimental results. The influence of the dielectric substrate on the coupler transmittance…
A broad technology platform for holographic recording of various infrared diffractive optical elements in semiconductor materials for application in spectral devices, telecom components and lasers is described. The room temperature process of photo-modification of the material refractive index at low light intensity i…
Optical filter based on multilayer structure was designed and fabricated by means of nanoimprint lithography. Spectral properties were simulated numerically. Working principle was shown to found on combination of Fabry-Perot and plasmon resonances.
Summary form only given. During reactive ion plasma etching (RIE) of semiconductor materials, a strong correlation between etch rate and feature size, or more specifically feature aspect ratio (AR), is often observed. There have been several analytical models proposed to explain this aspect ratio dependent etch-rate (…
At the “KWS2” small angle scattering instrument at the “FRM-2” neutron source at Garching, Germany a new 3He neutron detector was installed and commissioned in 2015. It is built of 18 “8-pack” modules from GE Power / Reuter-Stokes. Each of these modules has its own data acquisition and slow control processor, using on…
Developed luminescence method to study the growth mechanism of CuInS2quantum dots in real time is demonstrated.
Summary form only given. Fine granulated media are commonplace in the food industry, and are typically used for the manufacture of finished food products such as pasta, flours, snacks and many others. The processing and properties of these finished products can be heavily influenced by the characteristics of the granu…
In this thesis we develop and analyse gradient-fl \now type algorithms for minimising the Phase Field Crystal (PFC) functional. The PFC model was introduced by Elder et al [EKHG02] as a simple method for crystal simulation over long time-scales. The PFC model has been used to simulate many physical phenomena including…
An analytical expression for the field of the radial electric dipole inside the finite Maxwell Fish Eye (MFE) medium is obtained. It is found that arbitrarily large size medium cannot outperform classical Abbe's diffraction limit.
The article considers the problems of the development and the application of the technological volumes used as a part of the ultrasonic technological apparatuses at the intensification of the technological processes in a running mode. Proposed approaches to the design and application of the technological volumes allow…
Weak spontaneous emission and strong stimulated emission were switched reversibly by melting and freezing a polyethylene-glycol solution of rhodamine 6G, which exhibited a phase transition from transparent liquid to turbid solid.
We study the propagation and collision of extremely short electromagnetic pulses in an array of semiconductor carbon nanotubes. The mathematical model takes into account non-uniformity of the pulses' fields and redistribution of electron concentration in the system. We establish a possibility of stable post-collision…
Transparent glass-ceramics of the lithium gallium aluminosilicate system based on cobalt-doped Li(Al, Ga)5O8spinel nanosized crystals were developed. Their structure and optical properties were evaluated. Passive Q-switching of an Er, Yb:glass laser with 1 mJ/45 ns pulses at ~1.54 μm is realized.
The residual strength of composite laminates following low-velocity impact is affected by the location and size of individual delaminations. This study presents a first step towards an empirical model for the impact damage morphology of individual delaminations. To this end, the total mismatch angle, defined as the su…