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High-temperature superconductor applications development at Argonne National Laboratory (open access)

High-temperature superconductor applications development at Argonne National Laboratory

Developments at Argonne National Laboratory of near and intermediate term applications using high-temperature superconductors are discussed. Near-term applications of liquid-nitrogen depth sensors, current leads, and magnetic bearings are discussed in detail.
Date: February 9, 1992
Creator: Hull, J.R. & Poeppel, R.B.
System: The UNT Digital Library
High-temperature superconductor applications development at Argonne National Laboratory (open access)

High-temperature superconductor applications development at Argonne National Laboratory

Developments at Argonne National Laboratory of near and intermediate term applications using high-temperature superconductors are discussed. Near-term applications of liquid-nitrogen depth sensors, current leads, and magnetic bearings are discussed in detail.
Date: February 9, 1992
Creator: Hull, J. R. & Poeppel, R. B.
System: The UNT Digital Library
Hawaii Geothermal Project Environmental Impact Statement Scoping Meetings. Volume 3 (open access)

Hawaii Geothermal Project Environmental Impact Statement Scoping Meetings. Volume 3

None
Date: March 9, 1992
Creator: unknown
System: The UNT Digital Library
Hawaii Geothermal Project Environmental Impact Statement Scoping Meetings. Volume 4 (open access)

Hawaii Geothermal Project Environmental Impact Statement Scoping Meetings. Volume 4

None
Date: March 9, 1992
Creator: unknown
System: The UNT Digital Library
Acousto-optical confirmation of the localized wave phenomena (open access)

Acousto-optical confirmation of the localized wave phenomena

An acousto-optical measurement method is described which was used to conduct proof of principle experiments for a novel acoustic pulse system. The pulse theory, the Localized Wave pulse, is discussed and the system explained and described. The results of the experiments confirm the Localized Wave theory.
Date: September 9, 1992
Creator: Lewis, D. K.
System: The UNT Digital Library
Handling effluent from nuclear thermal propulsion system ground tests (open access)

Handling effluent from nuclear thermal propulsion system ground tests

A variety of approaches for handling effluent from nuclear thermal propulsion system ground tests in an environmentally acceptable manner are discussed. The functional requirements of effluent treatment are defined and concept options are presented within the framework of these requirements. System concepts differ primarily in the choice of fission-product retention and waste handling concepts. The concept options considered range from closed cycle (venting the exhaust to a closed volume or recirculating the hydrogen in a closed loop) to open cycle (real time processing and venting of the effluent). This paper reviews the different methods to handle effluent from nuclear thermal propulsion system ground tests.
Date: September 9, 1992
Creator: Shipers, L. R. & Allen, G. C.
System: The UNT Digital Library
Air Quality Modeling Guidelines (open access)

Air Quality Modeling Guidelines

Document "provid[ing] guidance on models and modeling procedures that are used in support of air permitting in the State of Texas" (p. i).
Date: November 9, 1992
Creator: Texas Air Control Board
System: The Portal to Texas History
Multi-frame x-ray imaging with a large area 40ps camera (open access)

Multi-frame x-ray imaging with a large area 40ps camera

The authors have developed a large area short pulse framing camera that is capable of sixteen frames and shutter times of 40ps per frame. This is accomplished with a high fidelity electrical circuit and a L/D = 20 microchannel plate, driven by a short pulse (80ps) high amplitude electrical driver. They show results of this work they have done to support this type of shutter time and the difficulties associated with large area high speed shuttering.
Date: November 9, 1992
Creator: Bell, P. M.; Kilkenny, J. D.; Landen, O. L.; Hanks, R. L.; Wiedwald, J. D. & Bradley, D. K.
System: The UNT Digital Library
The NHMFL 60 tesla, 100 millisecond pulsed magnet (open access)

The NHMFL 60 tesla, 100 millisecond pulsed magnet

Among the new facilities to be offered by the National Science Foundation through the National High Magnetic Field Laboratory (NHMFL) are pulsed fields that can only be achieved at a national user facility by virtue of their strength, duration, and volume. In particular, a 44 mm bore pulsed magnet giving a 60 tesla field for 100 ms is in the final design stage. This magnet will be powered by a 1.4 GW motor-generator at Los Alamos and is an important step toward proving design principles that will be needed for the higher field quasi-stationary pulsed magnets that this power source is capable of driving. This report will discuss specifications and parameters of this magnet.
Date: November 9, 1992
Creator: Boenig, H. J.; Campbell, L. J.; Rickel, D. G.; Rogers, J. D.; Schillig, J. B.; Sims, J. R. (Los Alamos National Lab., NM (United States)) et al.
System: The UNT Digital Library
The NHMFL 60 tesla, 100 millisecond pulsed magnet (open access)

The NHMFL 60 tesla, 100 millisecond pulsed magnet

Among the new facilities to be offered by the National Science Foundation through the National High Magnetic Field Laboratory (NHMFL) are pulsed fields that can only be achieved at a national user facility by virtue of their strength, duration, and volume. In particular, a 44 mm bore pulsed magnet giving a 60 tesla field for 100 ms is in the final design stage. This magnet will be powered by a 1.4 GW motor-generator at Los Alamos and is an important step toward proving design principles that will be needed for the higher field quasi-stationary pulsed magnets that this power source is capable of driving. This report will discuss specifications and parameters of this magnet.
Date: November 9, 1992
Creator: Boenig, H. J.; Campbell, L. J.; Rickel, D. G.; Rogers, J. D.; Schillig, J. B.; Sims, J. R. et al.
System: The UNT Digital Library
The effect of process parameters on the surface finish of plasma polymers (open access)

The effect of process parameters on the surface finish of plasma polymers

The surface finish of plasma polymers deposited in an inductively coupled discharge were measured as a function of gas flow rates. Surface finish was measured both optically and by AFM. The process parameters of the plasma polymerization were found to effect the surface finish. The gases used were trans-2- butene and hydrogen for hydrocarbon polymers. For bromocarbon polymers we added ethylbromide. The smoothest hydrocarbon polymer coatings had an RMS surface finish better than 1 nm. Bumps 200 nm high spaced approximately 1 {mu}m apart grew on the surface of bromocarbon coatings when they were exposed to air. The composition of the bumps was found to be NH{sub 4}Br by XRD and XPS analysis. We believe that nitrogen (from a small leak or desorption) dissociates in the discharge and reacts with hydrogen to form ammonia. The ammonia then reacts with HBr, a dissociation product of ethylbromide, to form NH{sub 4}Br which is dispersed throughout the deposited layer. Humidity facilitates the transport of the NH{sub 4}Br to the surface where it crystallizes. Bump growth was prevented by either dry storage or overcoating with 3 {mu}m of hydrocarbon plasma polymer. Alternatively, the bumps could be washed from the surface with water.
Date: December 9, 1992
Creator: Letts, S. A.; Cook, R. C.; Welch, P.; McEachern, R. & Fearon, E.
System: The UNT Digital Library
Impedance-power effects on plasma polymer surface finish using a helical resonator discharge (open access)

Impedance-power effects on plasma polymer surface finish using a helical resonator discharge

Plasma polymerized organic coatings are used in the fabrication of targets for experiments in the Inertial Confinement Fusion (ICF) program at Lawrence Livermore National Laboratory. The authors are performing experiments to understand the process conditions leading to the preparation of smooth ({approx}100{Angstrom}) plasma polymer surfaces while maintaining the highest deposition rate possible. It had been reported by Howling et al., that the formation of particulate matter in the deposition of silicon by the plasma reaction of silane affected the plasma impedance. This suggested that experiments designed to examine the correlation of surface texture with plasma impedance would be of interest. Furthermore, it is possible that an impedance change may cause a change in the power coupling efficiency from the transmitter to the plasma. Preliminary work in the authors laboratory indicated that the reactor temperature influenced the surface texture. The focus of this paper is to carefully examine the effects of reactor temperature on the surface texture of the plasma polymer, ensuring constant reactor conditions especially with respect to rf power.
Date: December 9, 1992
Creator: Brusasco, R.; Ferguson, S. W. & Stever, R.
System: The UNT Digital Library