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1. 8K conditioning (non-quench training) of a model SSC dipole
The accepted hypothesis is that training quenches are caused by heat generation when conductors move under Lorentz force. Afterwards no conductor motion will occur until a higher field and greater Lorentz force acts. If superior heat transfer and/or greater temperature margin is provided by operating at lower bath temperature, one might expect that the heat generated by conductor motion will not cause a runaway temperature increase, or quench. To test this hypothesis, the central dipole field in SSC model magnets was ramped at 1.8 K to 7.1 tesla without the magnets' quenching. The bath was then raised to 4.4 K and the magnets quenched at their short sample limits of 6.6 tesla or higher. Comparison with similar magnets trained in He I at 4.4 K is made and the significance of the non-quench training on system operation is discussed.
Date:
September 1, 1986
Creator:
Gilbert, W. S. & Hassenzahl, W. V.
Object Type:
Article
System:
The UNT Digital Library
3-body final states in peripheral heavy-ion collisions: nuclear clustering structure and projectile excitation revisited
Even though peripheral heavy-ion collisions are less violent than their central counterparts, the large energy exchange between the reactants often leaves the primary products in excited particle-unstable states whose subsequent decay leads to 3 or more nuclei emerging in the final exit channel. These post-reaction, predominantly sequential de-excitation processes can sometimes provide interesting structural information about the parent nuclei. In fact, provided these processes are well understood, one can employ them as probes for studying initial properties of the fragments. This report discusses results of two experiments that deal with (1) nonstatistical, rare decay modes of the projectile, and (2) internal excitation energy of the projectile- and target-like fragments in peripheral collisions. The physics addressed in each is different, but the experimental and data-analysis techniques are so similar that it is relevant to join them together.
Date:
February 1, 1986
Creator:
Chan, Y.; Chavez, E.; Gazes, S.B.; Kamermans, R.; Schmidt, H.R.; Siwek-Wilczynska, J. et al.
Object Type:
Article
System:
The UNT Digital Library
3-D Analysis on Arbitrarily-Shaped Icrf Antennas and Faraday Shields
Cavity antennas with Faraday shields are proposed to couple ion cyclotron radio frequency power for heating fusion plasmas. This application requires small, high-power, low-frequency antennas. The results are presented of a theoretical study of the ICRF antennas being developed for this purpose at the Radio Frequency Test Facility (RFTF). The objectives of this work are to optimize experimental designs and to confirm test results. (MOW)
Date:
January 1, 1986
Creator:
Chen, G. L.; Whealton, J. H.; Baity, F. W.; Hoffman, D. J. & Owens, T. L.
Object Type:
Article
System:
The UNT Digital Library
3-D transient eddy current calculations for the FELIX cylinder experiments
The three-dimensional eddy current transient field problem is formulated first using the U-V method. This method breaks the vector Helmholtz equation into two scalar Helmholtz equations. Null field integral equations and the appropriate boundary conditions are used to set up an identification matrix which is independent of null field point locations. Embedded in the identification matrix are the unknown eigenvalues of the problem representing its impulse response in time. These eigenvalues are found by equating the determinant of the identification matrix to zero. When this initial forcing function is Fourier decomposed into its spatial harmonics, each Fourier component can be associated with a unique eigenvalue by this technique. The true transient solution comes through a convolution of the impulse response so obtained with the particular external field decay governing the problem at hand. The technique is applied to the FELIX cylinder experiments; computed results are compared to data. A pseudoanalytic confirmation of the eigenvalues so obtained is formulated to validate the procedure.
Date:
December 1, 1986
Creator:
Davey, K. R. & Turner, L. R.
Object Type:
Report
System:
The UNT Digital Library
5-cm, no iron SSC 6-m dipole test program
Magnet Design B for the Superconducting Super Collider (SSC) consists of a 5 cm diameter collared coil assembly 12 m long with concentric aluminum thermal shields at 10 K and 80 K, a G-10 post type support system and a minimal iron vacuum vessel located at a large radius from the coil. In order to determine the behavior of such a magnet under both direct current and quenching conditions, a 6 m model was built using Tevatron tooling to produce a 7.6 cm diameter coil. The dc operation demonstrated that the post type suspension has acceptable rigidity. Distortions in the aluminum thermal shield during quench resulted from stresses in the material below the yield values. Temperature increases in the thermal shield due to eddy currents were larger than those calculated using simple assumptions, demonstrating the value of using a model to verify eddy current behavior in complex situations.
Date:
February 1, 1986
Creator:
Mazur, P. O.; Carson, J. A.; Engler, N. H.; Fisk, H. E.; Gonczy, J. D.; Hanft, R. W. et al.
Object Type:
Article
System:
The UNT Digital Library
6 GeV synchrotron x-ray source: Conceptual design report. Supplement A - characteristics of the insertion devices for the 6 GeV synchrotron source
Historically, synchrotron radiation (SR) has been obtained primarily from bending-magnet (BM) sources. These continuous sources of electromagnetic radiation have contributed in a major way to our understanding of the structure and dynamics of biological, chemical and material systems. During the past few years, newer sources of SR based on sophisticated periodic magnetic structures, called insertion devices (IDs), have been developed. The electromagnetic radiation from these IDs can be used as a very versatile probe in scientific and technological research which is far superior to that based on a BM source.
Date:
March 1, 1986
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
35 Years of Electron Scattering
A review of the current knowledge of nuclear and nucleon structure gained from electron beam physics is given. Also, the reasons for development of new accelerator facilities (in particular, CEBAF) are discussed.
Date:
October 1, 1986
Creator:
Walecka, J.
Object Type:
Article
System:
The UNT Digital Library
86-3
Dark background with many small geometric shapes, lines and dots in bright colors evenly spaced around the canvas over a structured linear pattern.
Date:
1986
Creator:
Falsetta, Vincent
Object Type:
Artwork
System:
The UNT Digital Library
112 Years in Little Elm Community
Book describing the early history of Little Elm including schools, churches, and social organizations, as well as important families in the area. Name index starts on page 199.
Date:
1986
Creator:
Harris, Mrs. J. M.
Object Type:
Book
System:
The Portal to Texas History
150 Years of Change: Land - Wildlife - Waters - People
Special issue of a magazine discussing information related to the outdoors in Texas, commemorating the state's sesquicentennial and discussing the history of the land, wildlife, waters, and people during the past 150 years.
Date:
March 1986
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
190 South La Salle
Access:
Use of this item is restricted to the UNT Community
View of the top of a skyscraper at 190 South La Salle Street in Chicago, Illinois.
Date:
1986
Creator:
Johnson, Philip & Burgee, John Henry
Object Type:
Photograph
System:
The UNT Digital Library
350 MW(t) design fuel cycle selection. Revision 1
This document discusses the results of this evaluation and a recommendation to retain the graded fuel cycle in which one-half of the fuel elements are exchanged at each refueling. This recommendation is based on the better performance of the graded cycle relative to the evaluation criteria of both economics and control margin. A choice to retain the graded cycle and a power density of 5.9 MW/m{sup 3} for the upcoming conceptual design phase was deemed prudent for the following reasons: the graded cycle has significantly better economics, and essentially the same expected availability factor as the batch design, when both are evaluated against the same requirements, including water ingress; and the reduction in maximum fuel pin power peaking in the batch design compared to the graded cycle is only a few percent and gas hot streaks are not improved by changing to a batch cycle. The preliminary 2-D power distribution studies for both designs showed that maximum fuel pin power peaking, particularly near the inner reflector, was high for both designs and nearly the same in magnitude. 10 figs., 9 tabs.
Date:
January 1986
Creator:
Lane, R. K.; Lefler, W. & Shirley, G.
Object Type:
Report
System:
The UNT Digital Library
A 360 Year Temperature and Precipitation Record for the Pasco Basin Derived From Tree-Ring Data
None
Date:
August 1, 1986
Creator:
Cropper, J. P.; Fritts, H. C. & Foley, M. G.
Object Type:
Report
System:
The UNT Digital Library
[611 Church]
Photograph of the corner of a two-story home. The house has several windows and a complex, triangular roof. On the back of the photograph, a handwritten note reads, "611 Church from Williamson County Sun '86."
Date:
1986
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[1220 Austin]
Photograph of the corner of a large home on 1220 Austin. The home is white and has many windows with dark panels. On the back of the photograph, a handwritten note reads, "1220 Austin #9 (1986 Home Tour)."
Date:
1986
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
15th Street News (Midwest City, Okla.), Vol. 15, No. 2, Ed. 1 Friday, September 5, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 5, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 3, Ed. 1 Friday, September 12, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 12, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 4, Ed. 1 Friday, September 19, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 19, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 5, Ed. 1 Friday, September 26, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 26, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 6, Ed. 1 Friday, October 3, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 3, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 7, Ed. 1 Friday, October 10, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 10, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 8, Ed. 1 Friday, October 17, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 17, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 9, Ed. 1 Friday, October 24, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 24, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 15, No. 10, Ed. 1 Friday, October 31, 1986
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 31, 1986
Creator:
Intrieri, Danette
Object Type:
Newspaper
System:
The Gateway to Oklahoma History