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Pressure-induced Breaking of Equilibrium Flux Surfaces in the W7AS Stellarator
Calculations are presented for two shots in the W7AS stellarator which differ only in the magnitude of the current in the divertor control coil, but have very different values of experimentally attainable β (<β> ≈ 2.7% versus <β> ≈ 1.8%). Equilibrium calculations find that a region of chaotic magnetic field line trajectories fills approximately the outer 1/3 of the cross-section in each of these configurations. The field lines in the stochastic region are calculated to behave as if the flux surfaces are broken only locally near the outer midplane and are preserved elsewhere. The calculated magnetic field line diffusion coefficients in the stochastic regions for the two shots are consistent with the observed differences in the attainable β, and are also consistent with the differences in the reconstructed pressure profiles.
Date:
April 24, 2007
Creator:
A. Reiman, M.C. Zarnstorff, D. Monticello, A. Weller, J. Geiger, and the W7-AS Team
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the Cask Transportation Facility Modifications (CTFM) compliance to DOE order 6430.1A Project A.5 and A.6
This report was prepared to evaluate the compliance of CTFM to DOE Order 6430.1A. This document presents the results of an evaluation that was performed to assess compliance of the K West (KW) Cask Transportation Facility Modifications (CTFM) designs against applicable requirements of Department of Energy (DOE) Order 6430.1 A, General Design Criteria. This evaluation was grouped under two categories described as Cask Loadout System (CLS) and Cranes/Other Modifications.
Date:
April 24, 2000
Creator:
ARD, K.E.
Object Type:
Report
System:
The UNT Digital Library
LEEM investigations of clean surfaces driven by energetic ion beams
The original purpose of this award was to use low‐energy electron microscopy (LEEM) to explore the dynamics of surfaces of clean single crystal surfaces when driven by a beam of energetic ions. The goal was to understand the nanoscience of hyperthermal growth, surface erosion by sublimation and irradiation, operation of surface sinks in irradiated materials, diffusion on driven surfaces, and the creation of structural patterns. This project was based on a novel LEEM system constructed by C. P. Flynn, which provided real‐time imaging of surface dynamics by scattering low energy electrons. With the passing of Prof. Flynn in late 2011, this project was completed under a slightly different scope by constructing a low‐energy, inelastic electron scattering (�EELS�) instrument. Consistent with Flynn�s original objectives for his LEEM system, this device probes the dynamics of crystal surfaces. However the measurements are not carried out in real time, but instead are done in the frequency domain, through the energy lost from the probe electrons. The purpose of this device is to study the collective bosonic excitations in a variety of materials, including high temperature superconductors, topological insulators, carbon allotropes including (but not limited to) graphene, etc. The ultimate goal here is to identify …
Date:
April 24, 2013
Creator:
Abbamonte, Peter M.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Rula Walid Bibi, April 24, 2011
Access:
Use of this item is restricted to the UNT Community
Interview with Rula Walid Bibi, Palestinian-born immigrant to Plano, Texas, for the DFW Metroplex Immigrants Oral History Project. The interview includes Bibi's personal experience with discrimination of Palestinians in the Middle East, childhood in Kuwait City, education at the University of Kuwait and Midwestern State University, family experiences during the First Gulf War and circumstances surrounding her immigration to Texas in 1990, thoughts on religion, experiences as a single mother as well as experiences of living in Wichita Falls, Dallas, Richardson, Garland, and Plano. Bibi talks about her first impressions of the U.S., her career in medical technologies, her marriage to an American man and his conversion to Islam, her involvement with political organizations, and thoughts on American education and foreign policy.
Date:
April 24, 2011
Creator:
Abigail, R. Matthew & Bibi, Rula Walid
Object Type:
Book
System:
The UNT Digital Library
The Chickasha Star (Chickasha, Okla.), Vol. 73, No. 6, Ed. 1 Thursday, April 24, 1975
Weekly newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1975
Creator:
Acree, Ron
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Breckenridge American (Breckenridge, Tex.), Vol. 9, No. 147, Ed. 1, Wednesday, April 24, 1929
Daily newspaper from Breckenridge, Texas that includes local, state and national news along with extensive advertising.
Date:
April 24, 1929
Creator:
Adair, A. Garland
Object Type:
Newspaper
System:
The Portal to Texas History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 74, No. 83, Ed. 1 Sunday, April 24, 1983
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1983
Creator:
Adams, Bill
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Harper County Democrat (Buffalo, Okla.), Vol. 7, No. 52, Ed. 1 Friday, April 24, 1914
Weekly newspaper from Buffalo, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1914
Creator:
Adams, E. Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Pioneer Exponent. (Comanche, Tex.), Vol. 21, No. 34, Ed. 1 Friday, April 24, 1908
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 1908
Creator:
Adams, Jesse M.
Object Type:
Newspaper
System:
The Portal to Texas History
Recommended technical specifications for first generation test surface and subsurface markers
Federal regulations and Rockwell Hanford Operations (Rockwell) planning documents require that radioactive waste sites disposed in-place be permanently marked. A number of technical studies have addressed the materials to be used for permanent markers as well as the design configurations. Criteria and standards for markers have also been prepared and issued in draft form. The next step in marker development requires laboratory and field testing of prototype markers. This document provides design specifications for the first generation surface and subsurface markers. At the conclusion of testing activities, definitive specifications can be prepared. Included herein are specifications for marker placement, marker materials, marker configuration and dimensions and marker messages. This document presents specifications only and does not provide rationale or justification for the specifications. Such rationale and justification is available in referenced documents.
Date:
April 24, 1984
Creator:
Adams, M. R.
Object Type:
Report
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 80, No. 9, Ed. 1 Thursday, April 24, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
Estimate of Hazard Produced by Accidental Release of Gaseous Fission Products from an ORR Fused Salt Capsule Experiment
An accidental release of gaseous fission products from an ORR fused salt capsule, containing 26 mg. of U/sup 235/, was postulated and the resuiting hazard estimated by calculating the maximum external and internal dose an individual could receive from exposure to the gaseous fission products and their decay products. Assuming all the contained gaseous fission produets are released, the resulting external and internal dosc, to organs other than the thyroid, arc insignificant. The dose to the thyroid by radioiodine is considered to be significant. By retaining at least 90% of the iodine isotopes in the experiment system through use of an iodine trap, a large reduction in both the external whole body and internal thyroid doses may be achieved. Therefore, assuming an iodine trap is utilized, it appears that the consequences of am accidental gaseous fission product release from an ORR fused salt capsule experiment would not be serious. (auth)
Date:
April 24, 1959
Creator:
Adams, R. E. & Browning, W. E.
Object Type:
Report
System:
The UNT Digital Library
Convair Weekly Report to Supervision, Number 929, April 24, 1974
Newsletter written for supervisors working at the Convair Division in Fort Worth containing news about events and activities, workplace reminders, and other relevant information.
Date:
April 24, 1974
Creator:
Adams, Richard E.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Edmond Enterprise (Edmond, Okla.), Vol. 13, No. 12, Ed. 1 Thursday, April 24, 1913
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1913
Creator:
Adamson, J. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Edmond Enterprise (Edmond, Okla.), Vol. 24, No. 13, Ed. 1 Thursday, April 24, 1924
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1924
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Edmond Enterprise (Edmond, Okla.), Vol. 29, No. 12, Ed. 1 Thursday, April 24, 1930
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1930
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Development of a video-based slurry sensor for on-line ash analysis. Second quarterly technical progress report, January 1, 1995--March 31, 1995
Automatic control of fine coal cleaning circuits has traditionally been limited by the lack of sensors for on-line ash analysis. Although several nuclear-based analyzers are available, none have seen widespread acceptance. This is largely due to the fact that nuclear sensors are expensive and tend to be influenced by changes in seam type and pyrite content. Recently, researchers at VPI&SU have developed an optical sensor for phosphate analysis. The sensor uses image processing technology to analyze video images of phosphate ore. It is currently being used by Texasgulf for off-line analysis of dry flotation concentrates. The primary advantages of optical sensors over nuclear sensors are that they are significantly cheaper, are not subject to measurement variations due to changes in high atomic number minerals, are inherently safer and require no special radiation permitting. Purpose of this work is to apply the knowledge gained in the development of an optical phosphate analyzer to the development of an on-line ash analyzer for fine coal slurries. During the past quarter, tests were performed on two prototype sample presentation systems for the optical analyzer. Preliminary results indicate that the flow of slurry past the camera lens is too consistent to provide reliable results. A …
Date:
April 24, 1995
Creator:
Adel, G. T. & Luttrell, G. H.
Object Type:
Report
System:
The UNT Digital Library
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 72, No. 80, Ed. 1 Friday, April 24, 1981
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1981
Creator:
Adkisson, Larry R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 39, No. 140, Ed. 1 Friday, April 24, 1953
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 24, 1953
Creator:
Adler, Dot
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oilton Gusher (Oilton, Okla.), Vol. 8, No. 47, Ed. 1 Thursday, April 24, 1924
Weekly newspaper from Oilton, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 24, 1924
Creator:
Admire, Eli L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Ensemble: 1997-04-24 - African Percussion Ensemble
Ensemble concert performed at the UNT College of Music Concert Hall.
Date:
April 24, 1997
Creator:
African Percussion Ensemble
Object Type:
Sound
System:
The UNT Digital Library
Stress-Relief Displacements Induced by Drilling--Applications to Holographic Measurements of in Situ Stress
The holographic stressmeter is an instrument which has been developed at Caltech to allow determination of the complete stress tensor from in situ borehole measurements. The stressmeter uses double-exposure holographic interferometry to record the displacements induced by the drilling of a small sidehole into the borehole wall. The local stresses, which are the result of the far-field stresses, concentrated at the borehole, cause deformation of the surface of the borehole wall in the vicinity of the sidehole. The first part of this study uses a thin infinite elastic plate subjected to plane stress at infinity to model the displacements at the borehole wall. However, the existence of some holograms which were difficult to model closely led us to examine the validity of this model. In order to investigate the problem further, we performed a two-dimensional finite element analysis for an elastic box with a terminated hole. We varied the dimensions of the hole to see what effect the radius and depth of the hole might have on the displacements. The plate model predicts that the depth of the hole should have no effect on the horizontal components of displacement, but the finite element results show that the magnitude of both …
Date:
April 24, 1992
Creator:
Ahrens, T. J. & Smither, C. L.
Object Type:
Report
System:
The UNT Digital Library
Stress-Relief Displacements Induced by Drilling--Applications to Holographic Measurements of in Situ Stress. Final Technical Report, August 15, 1988--August 14, 1990
The holographic stressmeter is an instrument which has been developed at Caltech to allow determination of the complete stress tensor from in situ borehole measurements. The stressmeter uses double-exposure holographic interferometry to record the displacements induced by the drilling of a small sidehole into the borehole wall. The local stresses, which are the result of the far-field stresses, concentrated at the borehole, cause deformation of the surface of the borehole wall in the vicinity of the sidehole. The first part of this study uses a thin infinite elastic plate subjected to plane stress at infinity to model the displacements at the borehole wall. However, the existence of some holograms which were difficult to model closely led us to examine the validity of this model. In order to investigate the problem further, we performed a two-dimensional finite element analysis for an elastic box with a terminated hole. We varied the dimensions of the hole to see what effect the radius and depth of the hole might have on the displacements. The plate model predicts that the depth of the hole should have no effect on the horizontal components of displacement, but the finite element results show that the magnitude of both …
Date:
April 24, 1992
Creator:
Ahrens, T. J. & Smither, C. L.
Object Type:
Report
System:
The UNT Digital Library
The Crockett Courier (Crockett, Tex.), Vol. 24, No. 13, Ed. 1 Thursday, April 24, 1913
Weekly newspaper from Crockett, Texas that includes local, state and national news along with advertising.
Date:
April 24, 1913
Creator:
Aiken, W. W.
Object Type:
Newspaper
System:
The Portal to Texas History