Cryogenic analytical tools for LHe distribution system design (open access)

Cryogenic analytical tools for LHe distribution system design

The two computer programs presented in this paper are both fundamentally general in that they could be applied to other magnet systems. In addition to MFTF-B analyses, these programs will be used on current and future GDC superconducting magnet projects. Future extended capabilities will include transient heating and flow conditions for THERMOSIPHON and multiple magnet quench features for MAGPRS.
Date: July 29, 1983
Creator: Johnson, R.R.
System: The UNT Digital Library
Great Plains Coal Gasification Project: Quarterly technical progress report, April-June 1988 (Fourth fiscal quarter, 1987-1988) (open access)

Great Plains Coal Gasification Project: Quarterly technical progress report, April-June 1988 (Fourth fiscal quarter, 1987-1988)

This progress report describes the operation of the Great Plains Gasification Plant, including lignite coal production, SNG production, gas quality, by-products, and certain problems encountered. (LTN)
Date: July 29, 1988
Creator: unknown
System: The UNT Digital Library
Diagnosis of sources of current inefficiency in industrial molten salt electrolysis cells by Raman spectroscopy (open access)

Diagnosis of sources of current inefficiency in industrial molten salt electrolysis cells by Raman spectroscopy

The purpose of this project was to employ Raman spectroscopy in the study of industrial molten salt electrolysis cells. The objective was to improve the understanding of the chemistry and electrochemistry of the relevant melt systems and, in turn, of energy loss mechanisms in the industrial processes. On this basis new ways to improve the energy efficiency of these industrial reactors might be identified. The research plan has several principal elements. First, there was the design and construction of laboratory scale representations of industrial molten salt electrolysis cells that would at the same time serve a spectrocells. Secondly, there was the mastery of the preparation of the molten salt electrolytes, what in industry is called the ''front end.'' Thirdly, there was the adaptation of commercially available Raman instrumentation in order to facilitate the proposed studies. It is the nature of the specimens that so dramatically distinguished this work from conventional Raman studies for which commercial instrumentation is designed: first, the laboratory scale electrolysis cells are large compared to typical spectrocells; and secondly, the cells operate at, what for Raman studies are, extremely high temperatures. 4 refs., 2 figs.
Date: July 29, 1988
Creator: Sadoway, D.R.
System: The UNT Digital Library
Modifications of the design of the final transformer in the FFS to accommodate lower gradients in the final quadrupole triplet (open access)

Modifications of the design of the final transformer in the FFS to accommodate lower gradients in the final quadrupole triplet

The final transformer of the FFS includes the soft bend magnet and two symmetric quadrupole triplets. It ends at the IP. It is a telescopic transformer (meaning that its transfer matrix is diagonal) with a magnification of -1/5 in both planes. In the current design, L*, the distance between the downstream end of Q1 and the IP, is equal to 7.25 feet (2.21 m) and space is provided upstream of Q6 to accommodate a 27 foot long soft bend magnet. Satisfaction of the foregoing conditions leads to field gradients of about 19.8 kg/cm in Q1 and Q3 and 18.1 kg/cm in Q2. It now appears that it would be very difficult to attain such gradients. For practical superconducting quad designs, meaning iron-free, 5 cm bore, two-layer windings and 4.2/sup 0/K, experts have estimated that gradients of at least 14 kg/cm would be reasonable. This raises the question, can the final transformer in the FFS be modified to accommodate gradients of 14 kg/cm or less and if so at what price in performance.
Date: July 29, 1983
Creator: J.J., Murray
System: The UNT Digital Library
Accelerating the Loop Expansion (open access)

Accelerating the Loop Expansion

This thesis introduces a new non-perturbative technique into quantum field theory. To illustrate the method, I analyze the much-studied phi/sup 4/ theory in two dimensions. As a prelude, I first show that the Hartree approximation is easy to obtain from the calculation of the one-loop effective potential by a simple modification of the propagator that does not affect the perturbative renormalization procedure. A further modification then susggests itself, which has the same nice property, and which automatically yields a convex effective potential. I then show that both of these modifications extend naturally to higher orders in the derivative expansion of the effective action and to higher orders in the loop-expansion. The net effect is to re-sum the perturbation series for the effective action as a systematic ''accelerated'' non-perturbative expansion. Each term in the accelerated expansion corresponds to an infinite number of terms in the original series. Each term can be computed explicitly, albeit numerically. Many numerical graphs of the various approximations to the first two terms in the derivative expansion are given. I discuss the reliability of the results and the problem of spontaneous symmetry-breaking, as well as some potential applications to more interesting field theories. 40 refs.
Date: July 29, 1986
Creator: Ingermanson, R.
System: The UNT Digital Library
METHOD OF MAKING ELECTRODES FOR ELECTROCHEMICAL CELL (open access)

METHOD OF MAKING ELECTRODES FOR ELECTROCHEMICAL CELL

None
Date: July 29, 1981
Creator: Kaun, Thomas D. & Kilsdonk, Dennis J.
System: The UNT Digital Library
Reduction of Iron Saturation in Cosine Theta Dipoles (open access)

Reduction of Iron Saturation in Cosine Theta Dipoles

None
Date: July 29, 1985
Creator: Morgan, G.
System: The UNT Digital Library
Texas Broilers: For Week Ending July 25, 1987 (open access)

Texas Broilers: For Week Ending July 25, 1987

Weekly report of the Texas Agricultural Statistics Service on broiler chick numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending June 20 to the week ending July 25, during 1986 and 1987 for broiler eggs set, chicks hatched, and chicks placed.
Date: July 29, 1987
Creator: Texas Agricultural Statistics Service
System: The Portal to Texas History
The Balanced Budget Proposal: Some Macroeconomic Implications (open access)

The Balanced Budget Proposal: Some Macroeconomic Implications

This brief report outlines some possible macroeconomic implications of observing a statutory or constitutional commitment to balance the Federal budget. It does not address the legal questions about the proposal or their implementation, nor the economic and political questions related to decisions about the level of Federal revenues or expenditures. On the latter, its analysis refers to revenue and expenditure levels, in relation to total national product, typical of recent years.
Date: July 29, 1985
Creator: Henderson, John B.
System: The UNT Digital Library