Isotopic analyses of helium from wells located in the Four Corners area, southwestern US
Helium, the lightest noble gas, is a valuable resource located on the Colorado Plateau southwestern US. Helium, a proven, useful noble gas, has many applications in modern technology for its chemical, physical, and thermodynamic properties. As of this writing, the price of crude helium is ~40% greater than CH4, rendering the economic grade for direct and secondary extraction at 0.3% helium. The helium systems in the Four Corners area (i.e., the study area) are characterized utilizing the geochemistry of noble gases, hydrocarbons, and non-hydrocarbons (compositional and isotopic), as well as ...
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Halford, Daniel Thomas
Sonnenberg, Stephen A.
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Contributor:Rocca, Jorge J.; Szapiro, B.; Prabhuram, T.
Date:1988The secondary electron emission coefficient of materials for helium ion bombardment in the energy range 0.5-20 keV was measured for the surface conditions of cathodes in high voltage glow discharges. The materials studied ...
Self-consistent model for negative glow discharge lasers : the hollow cathode helium mercury laser, A Contributor:Fetzer, Gregory J.; Rocca, Jorge J.
Date:1992A model for negative glow metal-vapor ion lasers that self-consistently describes the dynamics of the negative glow and the cathode sheath regions of the discharge has been developed. The model computes the electron energy ...
Contributor:Villagran, Mayo; Rocca, Jorge J.
Date:1990Emission spectroscopy was used to study the temporal evolution of a highly ionized helium plasma generated in a 1-mm-diameter capillary by a fast (90-ns full width at half-maximum (FWHM)) discharge pulse. The time dependence ...