Many techniques have been used in the past to produce nanoscale RDX but all suffer difficulties with process scale-up. The approach used in this study is a mechanical approach as opposed to a chemical one such as recrystallization using supercritical fluids such as CO2.
As part of an ongoing effort to improve responsiveness of power systems to meet future mission needs in space, an independent survey of conventional and emerging power technology options has been conducted. In this paper, all power technology options, both generation and storage, have been organized, using figures of merit relevant to space systems, to provide a basis for more effectively matching power technology options to future mission requirements. The ...
Optical waveguides with InGaAs quantum wells grown by MBE integrated in the middle of their core are investigated. Photocurrents induced by guided TE and TM modes propagating parallel or perpendicular to the quantum wells have been measured and reflect the anisotropy of the optical matrix element. Spectra of the transmitted intensity of these guided modes have been measured, and the attenuation coefficient of the guided modes due to band edge ...
InGaAs quantum wires are obtained by holographic lithography and MBE regrowth on V-grooves. The influence of some fabrication steps on the interface is presented. The 110 and 11-BAR0 gratings are compared in terms of etching profiles and the evolution of the grating shape during the desorption and the epitaxial regrowth.
The photoluminescence (PL) peak positions of the ground state heavy and light-hole excitons on high-quality Molecular Beam Epitaxy grown GaAs/A(x)Ga(1-x)As (x = 0.3 and 1 multiquantum-well structures have been experimentally determined in the temperature range 4.2
Deep UV (A=257nm) holographic lithography is greatly improved by the application of an antireflective coating and a negative (chemical amplification) resist. Deep 90nm period gratings and smallest feature sizes of 40nm are transfered by dry etching to the substrate. Molecular beam epitaxial growth on finely channeled substrates allows us to fabricate high density arrays of buried GaAlAs quantum wires (filaments) (QF) with an optical quality comparable to flat quantum wells. ...
The fourth quarter activity described in this report consists of dendritic cell calibrations at Table Mountain using a standard cell derived from balloon flight calibrations and measurements of cell characteristics over a range of temperature from 40 C to 70 C. Array wrapping procedures were developed for an 8-square-foot array segment. Boom deflection calibrations on the DeHavilland STEM device indicated a deflection of 1.96 in. when loaded with 1.45 lbs ...
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