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Frozen-Plug Technique for Liquid-Oxygen Plumbing

An established plumbing technique is extended to systems other than water pipes.

Posted in: Physical Sciences, Briefs

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Measuring Two Key Parameters of H3 Color Centers in Diamond

These parameters are needed for the further development of diamond lasers. A method of measuring two key parameters of H3 color centers in diamond has been created as part of a continuing effort to develop tunable, continuouswave, visible lasers that would utilize diamond as the lasing medium. (An H3 color center in a diamond crystal lattice comprises two nitrogen atoms substituted for two carbon atoms bonded to a third carbon atom. H3 color centers can be induced artificially; they also occur naturally. If present in sufficient density, they impart a yellow hue.) The method may also be applicable to the corresponding parameters of other candidate lasing media. One of the parameters is the number density of color centers, which is needed for designing an efficient laser. The other parameter is an optical-absorption cross section, which, as explained below, is needed for determining the number density

Posted in: Physical Sciences, Briefs

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Dusty-Plasma Particle Accelerator

Microparticles and nanoparticles can be accelerated to controllable kinetic energies.

Posted in: Physical Sciences, Briefs

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Ferroelectric Devices Emit Charged Particles and Radiation

Compact, lightweight, low-power sources could be useful in numerous applications.

Posted in: Physical Sciences, Briefs, TSP

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Shock Waves in a Bose-Einstein Condensate

A paper presents a theoretical study of shock waves in a trapped Bose-Einstein condensate (BEC).

Posted in: Physical Sciences, Briefs, TSP

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Thermal Imaging of Earth for Accurate Pointing of Deep-Space Antennas

A report discusses a proposal to use thermal (long-wavelength infrared) images of the Earth, as seen from spacecraft at interplanetary distances, for pointing antennas and telescopes toward the Earth for Ka-band and optical communications.

Posted in: Physical Sciences, Briefs, TSP

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Aging Computer System to be Replaced by Supercomputer

Linux Supersystem supercomputers Linux Networx Bluffdale, UT 877-505-5694 www.linuxnetworx.com

Posted in: Application Briefs

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