Analysis of Fabry-Perot Velocimeter Records (open access)

Analysis of Fabry-Perot Velocimeter Records

Program demonstration and user instructions are presented for FabryVB5. This computer program was created for use in analyzing Fabry-Perot interferometer records that detail the velocity time histories of fast moving surfaces. Graphical curves representing peak fringe positions and fiducial timing dots are extracted from a digitized film record or from a CCD digital image. An analysis is demonstrated on a sample velocimeter record along with some mathematical formula and routine operations. Routines used to analyze calibration records on streak camera distortions are illustrated in an appendix. This is a Microsoft Visual Basic{trademark} version for the PC.
Date: August 3, 2001
Creator: Avara, G.
Object Type: Report
System: The UNT Digital Library
Theoretical Model for the EM Effects Induced by High-Energy Photons (Gamma, X-ray) in Dielectric Materials and Electronic Systems (open access)

Theoretical Model for the EM Effects Induced by High-Energy Photons (Gamma, X-ray) in Dielectric Materials and Electronic Systems

During last twenty years, a number of models have been used to calculate the change of conductivity and dielectric strength in materials caused by the passage of high-energy photons, such as Gamma-rays and X-rays. In these models, the electromagnetic fields generated in the electronic system created by the high-energy photons have not been investigated. That is, the solution of Maxwell's equations has not been obtained for these kinds of problems. We constructed a theoretical model, described by a set of equations to solve such a problem. The model includes the equations that describe the physics of the recombination and generation of electron-hole pairs by the high-energy photons in the dielectric materials, the Compton electron generation rates, and Maxwell's equations. When a beam of gamma photons penetrates into a transmission line or cables, energetic electrons and holes (carriers) are created in the metals and dielectrics of the system by the Compton and photoelectric effects. These energetic electrons and holes in turn create many low-energy holes and electrons through the interaction of the high-energy electrons with the atoms in the solids. Since the density of the solids is very high, the mean free path of the high-energy electrons is very short. In …
Date: August 3, 2001
Creator: Yee, J H; Mayhall, D J & Bland, M F
Object Type: Report
System: The UNT Digital Library
Derived Interaction Parameters for the Tsai-Wu Tensor Polynomial Theory of Strength for Composite Materials (open access)

Derived Interaction Parameters for the Tsai-Wu Tensor Polynomial Theory of Strength for Composite Materials

It is shown that the two interactive strength parameters in the Tsai-Wu tensor polynomial strength criterion for fiber composites can be derived in terms of the uniaxial or non-interacting strength parameters if the composite does not fail under practical levels of hydrostatic pressure or equal transverse compression. Thus the required number of parameters is reduced from seven to five and all five of the remaining strength terms are easily determined using standard test methods. The derived interactive parameters fall within the stability limits of the theory, yet they lead to open failure surfaces in the compressive stress quadrant. The assumptions used to derive the interactive parameters were supported by measurements for the effect of hydrostatic pressure and unequal transverse compression on the behavior of a typical carbon fiber composite.
Date: August 3, 2001
Creator: DeTeresa, S J & Larsen, G J
Object Type: Article
System: The UNT Digital Library
Update of Environmental and Safety Analyses for the National Ignition Facility: Using a New Model to Track Target Material Usage (open access)

Update of Environmental and Safety Analyses for the National Ignition Facility: Using a New Model to Track Target Material Usage

The purpose of this paper is to report the methodology and assumptions, data, and results of calculations concerning safety and environmental issues related to excursions to currently planned NIF operations. Many possible uses of NIF have been suggested over the years. While some of these possible uses have been adopted into the baseline plans for NIF, many others have not. While we do not yet know all of the possible approved uses for NIF, one of the items that would bear on whether a certain course use might be adopted or not would be its environmental and safety impact. Here we examine certain excursions from the existing planned operations to determine their environmental and safety impacts. These excursions are related to the use of ''cocktail'' hohlraums as the baseline target for ignition experiments in the National Ignition Facility (NIF) as well as possible increased utilization of beryllium and uranium. This paper also addresses the fission products produced from cocktail hohlraum use for high yield experiments. Again, this analyses does not imply an authorization to proceed with such modes of operation, or any intent to proceed beyond this analyses. A detailed analysis of a range of postulated experiments for NIF was …
Date: August 3, 2001
Creator: Gillich, D; Tobin, M; Singh, M; Kalantar, D; Brereton, S & MacGowan, B
Object Type: Report
System: The UNT Digital Library
DESIGN AND SYNTHESIS OF 2-DEOXY-2[{sup 18}F]FLUORO-D-GLUCOSE ({sup 18}FDG). (open access)

DESIGN AND SYNTHESIS OF 2-DEOXY-2[{sup 18}F]FLUORO-D-GLUCOSE ({sup 18}FDG).

None
Date: August 3, 2001
Creator: Fowler, J. S. & Ido, T.
Object Type: Book
System: The UNT Digital Library
2001 Gordon Research Conference on Microbial Population Biology. Final progress report (open access)

2001 Gordon Research Conference on Microbial Population Biology. Final progress report

None
Date: August 3, 2001
Creator: Chao, Lin
Object Type: Article
System: The UNT Digital Library
Quenches and resulting thermal and mechanical effects on epoxy impregnated Nb{sub 3}Sn high field magnets (open access)

Quenches and resulting thermal and mechanical effects on epoxy impregnated Nb{sub 3}Sn high field magnets

Thermal and its resulting mechanical stress due to quenches inside the Epoxy impregnated Nb{sub 3}Sn high field magnets are studied with a combination of a quench simulation program, and ANSYS program. We use the geometry of the high field cosine theta type dipole magnets with one meter and 10 meter length. The turns, where quenches started, are excessively heated up, up to 100 K to 300 K, depending on the coil length and time delay. The non quenching turns and surrounding material are not heated substantially. This elevated temperature and its gradient cause the excessive local stress in the quenching conductors and their insulation material. The stress and strain in the conductor as well as in the insulation become excessive, and they are studied using the ANSYS stress analysis.
Date: August 3, 2001
Creator: al., Ryuji Yamada et
Object Type: Article
System: The UNT Digital Library
Performance Evaluation of the IBM SP and the Compaq AlphaServer SC (open access)

Performance Evaluation of the IBM SP and the Compaq AlphaServer SC

Oak Ridge National Laboratory (ORNL) has recently installed both a Compaq AlphaServer SC and an IBM SP, each with 4-way SMP nodes, allowing a direct comparison of the two architectures. In this paper, we describe our initial evaluation. The evaluation looks at both kernel and application performance for a spectral atmospheric general circulation model, an important application for the ORNL systems.
Date: August 3, 2001
Creator: Worley, P. H.
Object Type: Article
System: The UNT Digital Library
2001 Gordon Research Conference on Quantum Control of Light and Matter. Final progress report [agenda and attendee list] (open access)

2001 Gordon Research Conference on Quantum Control of Light and Matter. Final progress report [agenda and attendee list]

The Gordon Research Conference on Quantum Control of Light and Matter [Quantum Control of Atomic and Molecular Motion] was held at Mount Holyoke College, South Hadley, Massachusetts, July 29 - August 3, 2001. The conference was attended by 119 participants. The attendees represented the spectrum of endeavor in this field, coming from academia, industry, and government laboratories, and included US and foreign scientists, senior researchers, young investigators, and students. Emphasis was placed on current unpublished research and discussion of the future target areas in this field. There was a conscious effort to stimulate discussion about the key issues in the field today. Session topics included the following: General perspectives, Phase control, Optimal control, Quantum information, Light manipulation and manipulation with light, Control in the condensed phase, Strong field control, Laser cooling and Bose-Einstein Condensate dynamics, and Control in the solid phase.
Date: August 3, 2001
Creator: Shapiro, Moshe
Object Type: Report
System: The UNT Digital Library