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3,417 Matching Results
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3,409 - 3,417 of
3,417
Effects of random errors in coil locations in a high-field superconducting accelerator
None
Date:
February 25, 1972
Creator:
Parzen, G.
Object Type:
Report
System:
The UNT Digital Library
Differencing of the diffusion equation in LASNEX
None
Date:
March 25, 1977
Creator:
Kershaw, D. S.
Object Type:
Report
System:
The UNT Digital Library
Calorimeters for diagnosis of laser-fusion experiments
A variety of calorimeters have been developed for measuring ions, x-rays, and scattered radiation emanating from laser-pulse-imploded fusion targets. The ion and x-ray calorimeters use metal or glass absorbers to reflect or transmit most of the scattered laser radiation; the versions using metal absorbers also incorporate a differential construction to compensate for the fraction of the scattered laser radiation that is absorbed. The scattered-radiation calorimeters use colored glass to absorb the radiation and a transparent glass shield to remove ions and x rays. Most of the calorimeters use commercial semiconductor thermoelectric modules as the temperature sensors.
Date:
October 25, 1976
Creator:
Gunn, S. R.
Object Type:
Report
System:
The UNT Digital Library
Treatment of waste lubricating oil using BERC/ERDA solvent
From data generated in the laboratory and pilot plant studies a quality rerefined oil can be produced via BERC/ERDA solvent extraction and clay treatment. Some of the important processing variables that determine the quality of the finished product are temperature of solvent extraction, type of clay used, temperature and time of clay treatment, and the atmosphere under which the oil is treated with clay. Yields of 75 percent based on water-distillate-free oil can be expected at the conditions used in pilot plant operations. The oils obtained could be compounded to produce a large number of high quality lubricating products. Unlike an acid-clay process where the acid sludges pose an environmental problem, the BERC/ERDA system produces a marketable sludge.
Date:
June 25, 1976
Creator:
Corlew, J. S. & Sluski, R. J.
Object Type:
Report
System:
The UNT Digital Library
Methane formation in tritium gas exposed to stainless steel
Tests were performed to determine the effect cleanliness of a surface exposed to tritium gas had on methane formation. These tests performed on 304 stainless steel vessels, cleaned in various ways, showed that the methane formation was reduced by the use of various cleaning procedures.
Date:
March 25, 1977
Creator:
Morris, G. A.
Object Type:
Report
System:
The UNT Digital Library
Computation at the edge of chaos: Phase transition and emergent computation
In order for computation to emerge spontaneously and become an important factor in the dynamics of a system, the material substrate must support the primitive functions required for computation: the transmission, storage, and modification of information. Under what conditions might we expect physical systems to support such computational primitives This paper presents research on Cellular Automata which suggests that the optimal conditions for the support of information transmission, storage, and modification, are achieved in the vicinity of a phase transition. We observe surprising similarities between the behaviors of computations and systems near phase-transitions, finding analogs of computational complexity classes and the Halting problem within the phenomenology of phase-transitions. We conclude that there is a fundamental connection between computation and phase-transitions, and discuss some of the implications for our understanding of nature if such a connection is borne out. 31 refs., 16 figs.
Date:
January 25, 1990
Creator:
Langton, C.
Object Type:
Article
System:
The UNT Digital Library
Solar one data acquisition. Interim progress report
Solar One has been instrumented with sensors for weather data system temperatures and pressures, house electrical loads, and photovoltaic system data. An automatic data acquisition and handling system has been designed and installed to gather and then transmit data to a central computer. Programs to summarize these data and tabulate them in convenient forms have been prepared. Initial data have been obtained and analyzed to check the sensor system and to give preliminary performance characteristics of the solar system. (WDM)
Date:
March 25, 1976
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Mass spectrometric analytical services and research. Annual progress report and quarterly report for the period December 9, 1975--March 8, 1976 activities to support coal-liquid characterization research
Interfacing of a Perkin Elmer model 3920 gas chromatograph to the CEC 21-110B mass spectrometer has been completed and the GC/MS system is operational. Detailed descriptions of the heated probe assembly and the rapid mass-scanning module are given. Initial emphasis has been placed on the utilization of GC/MS in conjunction with field ionization (FI). Satisfactory results have been obtained. The FI source for the CEC 21-110B mass spectrometer is routinely operational. Familiarity with its operation has improved ion-abundance reproducibility. For a mixture containing aromatic hydrocarbons, thiophenes, and furans, the average percent standard deviation in the average percent ionizations is 3.55 percent from three spectra. Application of the technique of FI mass spectrometry to quantitative analysis of coal type mixtures has been explored. The consequences of sensitivity data on the analytical results have been considered. Relative weight and mole sensitivities have been determined for 30 aromatic hydrocarbons, 20 thiophenes, and 7 heteroatom (oxygen and nitrogen) containing compounds with respect to ethylbenzene. Excellent analytical data has been obtained from three known mixtures using these sensitivities. Fifty three coal-liquid samples have been processed. Empirical formulas for 5000 ions have been determined from the high-resolution (70 eV) spectra recorded on photographic plates. FI spectra …
Date:
March 25, 1976
Creator:
Scheppele, S E
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the trapping and energy loss mechanisms of intense relativistic electron rings in hydrogen gas and plasma
The results of an experimental study on the trapping and energy loss mechanisms of intense, relativistic electron rings confined in Astron-like magnetic field geometries are presented. The work is subdivided into four sections: gas trapping; average ring electron energetics; plasma trapping, and hollow-beam cusp-injection into gas and plasma. The mechanisms by which the injected beam coalesces into a current ring in the existing Cornell RECE-Berta facility are considered. To investigate the nature of ring electron energy loss mechanisms following completion of the trapping process, a diagnostic was developed utilizing multi-foil X-ray absorption spectroscopy to analyze the Bremsstrahlung generated by the electrons as they impinge upon a thin tungsten wire target suspended in the circulating current. Finally, a set of preliminary experimental results is presented in which an annular electron beam was passed through a coaxial, non-adiabatic magnetic cusp located at one end of a magnetic mirror well.
Date:
April 25, 1977
Creator:
Smith, A. C., Jr.
Object Type:
Report
System:
The UNT Digital Library