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A 1-kW power demonstration from the advanced free electron laser
This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The main objective of this project was to engineer and procure an electron beamline compatible with the operation of a 1-kW free-electron laser (FEL). Another major task is the physics design of the electron beam line from the end of the wiggler to the electron beam dump. This task is especially difficult because electron beam is expected to have 20 kW of average power and to simultaneously have a 25% energy spread. The project goals were accomplished. The high-power electron design was completed. All of the hardware necessary for high-power operation was designed and procured.
Date:
August 1997
Creator:
Sheffield, R. L.; Conner, C. A. & Fortgang, C. M.
Object Type:
Report
System:
The UNT Digital Library
2 Hz, 30 T Split Pulse Water Cooled Magnet for Neutron Scattering Experiments (Materials Characterization and Design Options)
None
Date:
August 26, 1997
Creator:
Eyssa, Y. M.; Walsh, R. P.; Miller, J. R.; Miller, G. E.; Pernambuco-Wise, P.; Bird, M. D. et al.
Object Type:
Report
System:
The UNT Digital Library
A 6.7 MeV cw RFQ linac
A 6.7-MeV 350 MHz, cw Radio Frequency Quadrupole proton linac has been designed and is being fabricated for the Accelerator Production of Tritium Project at Los Alamos. This eight-meter long structure consists of four resonantly-coupled segments and is being fabricated using hydrogen furnace brazing as a joining technology. Details of the design and status of fabrication are reported.
Date:
August 1, 1997
Creator:
Schrage, D.; Young, L.; Clark, W.; Davis, T.; Martinez, F.; Naranjo, A. et al.
Object Type:
Article
System:
The UNT Digital Library
24 M Meteorological Tower Data Report Period: January--December, 1994
This report was prepared by the Desert Research Institute (DRI) for the U.S. Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT.
Date:
August 1, 1997
Creator:
Freeman, D.; Bowen, J. & Egami, R.
Object Type:
Report
System:
The UNT Digital Library
94-1 Research and development project lead laboratory support. Status report, January 1--March 31, 1997
This status report is published for Los Alamos National Laboratory 94-1 Research and Development Project Support. The Department of Energy Office of Environmental Management funds these projects in order to support the storage or disposal of legacy plutonium and plutonium-bearing materials that resulted from weapons production throughout the DOE complex. This report summarizes status and technical progress for Los Alamos 94-1 projects during the second quarter of fiscal year 1997.
Date:
August 1, 1997
Creator:
Rink, N.A.
Object Type:
Report
System:
The UNT Digital Library
222-S Laboratory maintenance implementation plan
This Maintenance Improvement Plan has been developed for maintenance functions associated with the 222-S Laboratory. This plan is developed from the guidelines presented by Department of Energy (DOE) Order 4330.4B, Maintenance Management Program (DOE 1994), Chapter 11. The objective of this plan is to provide information for establishing and identifying WMH conformance programs and policies applicable to implementation of DOE Order 4330.4B guidelines. In addition, this maintenance plan identifies the actions necessary to develop a cost effective and efficient maintenance program at 222-S Laboratory. Maintenance activities are mainly going to be performed by existing maintenance organizations within Waste Management Federal Services of Hanford (WMH). Most maintenance performed at 222-S Laboratory is performed by the 222-S Laboratory maintenance organization. This 222-S Laboratory Maintenance Implementation Plan provides the interface requirements and responsibilities as they apply specifically to 222-S Laboratory. This document provides an implementation schedule which has been developed for items considered to be deficient or in need of improvement. The discussion section as applied to 222-S Laboratory implementation has been developed from a review of programs and practices utilizing the graded approach. Biennial review and additional reviews are conducted as significant programmatic and mission changes are made. This document is revised …
Date:
August 13, 1997
Creator:
Heinemann, J. L.
Object Type:
Report
System:
The UNT Digital Library
1400 Liter 1.8K Test Facility
A double bath superfluid helium dewar has been constructed and operated at Fermilab`s Magnet Test Facility. The 1.8 K portion of the dewar is sized to contain a superconducting magnet up to 0.5 meters in diameter and 4 meters long in a vertical orientation in 0.12 MPa pressurized superfluid. The dewar can also provide a subcooled Helium I environment for tests; the entire temperature range from 4.4 K to 1. 8 K at 0.12 MPa is available. This paper describes the system design, lambda plate, heat exchanger, and performance.
Date:
August 1, 1997
Creator:
Peterson, T. J.; Rabehl, R. J. & Sylvester, C. D.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 27, No. 1, Ed. 1 Friday, August 29, 1997
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 29, 1997
Creator:
Easttom, Holly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1996 Site environmental report Sandia National Laboratories Albuquerque, New Mexico
Sandia National Laboratories/New Mexico (SNL/NM) is operated in support of the U.S. Department of Energy (DOE) mission to provide weapon component technology and hardware for national security needs, and to conduct fundamental research and development (R&D) to advance technology in energy research, computer science, waste management, electronics, materials science, and transportation safety for hazardous and nuclear components. In support of this mission, the Environmental Safety and Health (ES&H) Center at SNL/NM conducts extensive environmental monitoring, surveillance, and compliance activities to assist SNL`s line organizations in meeting all applicable environmental regulations applicable to the site including those regulating radiological and nonradiological effluents and emissions. Also herein are included, the status of environmental programs that direct and manage activities such as terrestrial surveillance; ambient air and meteorological monitoring; hazardous, radioactive, and solid waste management; pollution prevention and waste minimization; environmental restoration (ER); oil and chemical spill prevention; and National Environmental Policy Act (NEPA) documentation. This report has been prepared in compliance with DOE order 5400.1, General Environmental Protection.
Date:
August 1, 1997
Creator:
Fink, C.H.; Duncan, D. & Sanchez, R.
Object Type:
Report
System:
The UNT Digital Library
1996 Site environmental report Tonopah test range Tonopah, Nevada
Sandia National Laboratories (SNL) operates the Tonopah Test Range (TTR) for the Department of Energy`s (DOE) Weapons Ordnance Program. This annual report (calendar year 1996) summarizes the compliance status to environmental regulations applicable at the site including those statutes that govern air and water quality, waste management, clean-up of contaminated areas, control of toxic substances, and adherence to requirements as related to the National Environmental Policy Act (NEPA). In compliance with DOE Orders, SNL also conducts environmental surveillance for radiological and nonradiological contaminants. SNL`s responsibility for environmentals surveillance for radiological and nonradiological contaminants. SNL`s responsibility for environmental surveillance extends only to those activities performed by SNL or under its direction. Annual radiological and nonradiological routine releases and unplanned releases (occurrences) are also summarized herein.
Date:
August 1, 1997
Creator:
Culp, T.; Forston, W.; Duncan, D. & Sanchez, R.
Object Type:
Report
System:
The UNT Digital Library
1997 Small Agency Management Control Audit
Report of the Texas State Auditor's Office related to the financial analyses and assessments of management control systems at thirteen small agencies in order to establish reasonable controls to enable them to meet legislative mandates and deliver intended benefits.
Date:
August 1997
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Abnormal grain growth -- The origin of recrystallization nuclei?
The origin of recrystallization nuclei is reviewed with particular emphasis on materials in which well-developed cells are present in the deformed state. Nucleation is discussed in terms of coarsening of the subgrain network that develops on annealing and an analogy is made with abnormal grain growth. The results of a theoretical analysis of abnormal growth are summarized. The Monte Carlo model for grain growth is adapted for variable grain boundary energy and mobility in order to investigate the behavior of individual grains with special properties. The simulation results show that both energy and mobility affect abnormal growth as expected from the theoretical analysis. The results are discussed in terms of the stability that subgrain networks may exhibit depending on their mean misorientation.
Date:
August 1, 1997
Creator:
Rollett, A. D. & Holm, E. A.
Object Type:
Report
System:
The UNT Digital Library
Absolute measurements of the high-frequency magnetic dynamics in high-{Tc} superconductors
The authors review recent measurements of the high-frequency dynamic magnetic susceptibility in the high-T{sub c} superconducting systems La{sub 2{minus}x}Sr{sub x}CuO{sub 4} and YBa{sub 2}Cu{sub 3}O{sub 6+x}. Experiments were performed using the chopper spectrometers HET and MARI at the ISIS spallation source. The authors have placed their measurements on an absolute intensity scale, this allows systematic trends to be seen and comparisons with theory to be made. They find that the insulating S = 1/2 antiferromagnetic parent compounds show a dramatic renormalization in the spin wave intensity. The effect of doping on the response is to cause broadenings in wave vector and large redistributions of spectral weight in frequency.
Date:
August 7, 1997
Creator:
Hayden, S. M.; Aeppli, G.; Dai, P.; Mook, H. A.; Perring, T. G.; Cheong, S. W. et al.
Object Type:
Report
System:
The UNT Digital Library
Access control and interlock system at the Advanced Photon Source
The Advanced Photon Source (APS) consists of a linac, position accumulator ring (PAR), booster synchrotron, storage ring, and up to 70 experimental beamlines. The Access Control and Interlock System (ACIS) utilizes redundant programmable logic controllers (PLCs) and a third hard-wired chain to protect personnel from prompt radiation generated by the linac, PAR, synchrotron, and storage ring. This paper describes the ACIS`s design philosophy, configuration, hardware, functionality, validation requirements, and operational experience.
Date:
August 1, 1997
Creator:
Forrestal, J.; Hogrefe, R.; Knott, M.; McDowell, W.; Reigle, D.; Solita, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Accident investigation board report on the May 14, 1997, chemical explosion at the Plutonium Reclamation Facility, Hanford Site,Richland, Washington - summary report
This report is a summary of the Accident Investigation Board Report on the May 14, 1997, Chemical Explosion at the Plutonium Reclamation Facility, Hanford Site, Richland, Washington (DOE/RL-97-59). The referenced report provides a greater level of detail and includes a complete discussion of the facts identified, analysis of those facts, conclusions derived from the analysis, identification of the accident`s causal factors, and recommendations that should be addressed through follow-up action by the U.S. Department of Energy and its contractors. This companion document provides a concise summary of that report, with emphasis on management issues. Evaluation of emergency and occupational health response to, and radiological and chemical releases from, this accident was not within the scope of this investigation, but is the subject of a separate investigation and report (see DOE/RL-97-62).
Date:
August 7, 1997
Creator:
Gerton, R.E.
Object Type:
Report
System:
The UNT Digital Library
Accumulator ring lattice for the national spallation neutron source
The Accumulator Ring for the proposed National Spallation Neutron Source (NSNS) is to accept a 1.03 millisecond beam pulse from a 1 GeV Proton Linac at a repetition rate of 60 Hz. For each beam pulse, 10{sup 14} protons are to be accumulated via charge-exchange injection. A 295 nanosecond gap in the beam, maintained by an rf system, will allow for extraction to an external target for the production of neutrons by spallation. This paper describes the four-fold symmetric lattice that has been chosen for the ring. The lattice contains four long dispersion-free straight sections to accomodate injection, extraction, rf cavities, and beam scraping respectively. The four-fold symmetry allows for easy adjustment of the tunes and flexibility in the placement of correction elements, and ensures that potentially dangerous betatron structure resonances are avoided.
Date:
August 1997
Creator:
Gardner, C. J.; Lee, Y. Y. & Luccio, A. U.
Object Type:
Article
System:
The UNT Digital Library
Achievement of a superpolish on bare stainless steel
We report the achievement of a superpolished surface, suitable for x-ray reflection, on bare stainless steel. The rms roughness obtained on various samples varied from 2.2 to 4.2 {angstrom}, as measured by an optical profiler with a bandwidth 0.29-100 mm{sup -1}. The type 17-4 PH precipitation-hardening stainless steel used to make the mirrors is also capable of ultrastability and has good manufactureability. This combination of properties makes it an excellent candidate material for mirror substrates. We describe the successful utilization of this type of steel in making elliptical-cylinder mirrors for a soft-x-ray microprobe system at the Advanced Light Source, and discuss possible for its unusual stability and polishability.
Date:
August 1, 1997
Creator:
Howells, M.R. & Casstevens, J.
Object Type:
Article
System:
The UNT Digital Library
Achieving high performance in numerical computations on RISC workstations and parallel systems
The nominal peak speeds of both serial and parallel computers is raising rapidly. At the same time however it is becoming increasingly difficult to get out a significant fraction of this high peak speed from modern computer architectures. In this tutorial the authors give the scientists and engineers involved in numerically demanding calculations and simulations the necessary basic knowledge to write reasonably efficient programs. The basic principles are rather simple and the possible rewards large. Writing a program by taking into account optimization techniques related to the computer architecture can significantly speedup your program, often by factors of 10--100. As such, optimizing a program can for instance be a much better solution than buying a faster computer. If a few basic optimization principles are applied during program development, the additional time needed for obtaining an efficient program is practically negligible. In-depth optimization is usually only needed for a few subroutines or kernels and the effort involved is therefore also acceptable.
Date:
August 20, 1997
Creator:
Goedecker, S. & Hoisie, A.
Object Type:
Article
System:
The UNT Digital Library
Active chatter control in a milling machine
The use of active feedback compensation to mitigate cutting instabilities in an advanced milling machine is discussed in this paper. A linear structural model delineating dynamics significant to the onset of cutting instabilities was combined with a nonlinear cutting model to form a dynamic depiction of an existing milling machine. The model was validated with experimental data. Modifications made to an existing machine model were used to predict alterations in dynamics due to the integration of active feedback compensation. From simulations, subcomponent requirements were evaluated and cutting enhancements were predicted. Active compensation was shown to enable more than double the metal removal rate over conventional milling machines. 25 refs., 10 figs., 1 tab.
Date:
August 1, 1997
Creator:
Dohner, J. L.; Hinnerichs, T. D. & Lauffer, J. P.
Object Type:
Article
System:
The UNT Digital Library
The activity of cobalt and silicon in the Co - Si system with special focus on the {alpha} - Co solid solution
The activities of cobalt and silicon at 1463 K have been determined across the whole composition range in the Co - Si system, including the {alpha} - Co solid solution, for which no activity data were previously available. Simple and reactive Knudsen effusion mass spectroscopy employed in this work were shown to successfully overcome problems normally encountered in studying high-temperature solid binary systems, such as slow equilibration and low partial pressures of the components. The composition dependence of the cobalt activities within the {alpha} - Co solid solution phase was used to calculate the self-interaction coefficients of silicon in {alpha} - Co: ln {gamma}{sub Si} = 10.4 {+-} 0.2 and {epsilon}{sub Si}{sup (Si)} = 18.6 {+-} 0.8. The regular solution model was shown to be a fairly good description of the {alpha} - Co solid solution, with an energy parameter Z{sub CoSi} of -120 {+-} 5 kJ{center_dot}mol{sup -1}. The results compare well with literature data on similar systems, such as Fe - Si and Ni - Si.
Date:
August 1, 1997
Creator:
Lexa, D.; Kematick, R. J. & Myers, C. E.
Object Type:
Article
System:
The UNT Digital Library
Adaptive composite overlapping mesh algorithms on message passing architectures
This project developed high-level computational tools that facilitate the development of fluid flow simulation software using the adaptive composite overlapping mesh method. An objective-oriented approach was take which used the C++ programming language to develop libraries containing C++ classes that provide abstractions of the basic operations required to assemble the required simulation software. Through this approach, it was also possible to hide many of the details of the computations required on parallel computer architectures. Result is the basis for a high-level programming environment that facilitates the development of high-resolution simulation software on serial or parallel computer architectures for the equations describing fluid flow in regions with complex geometry.
Date:
August 1997
Creator:
Brown, D. L.; Quinlan, D. J.; Chesshire, G. S.; Henshaw, W. D. & Berndt, M.
Object Type:
Report
System:
The UNT Digital Library
Adaptive Mesh Refinement Algorithm Development and Dissemination
This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project objective was to develop and disseminate adaptive mesh refinement (AMR) algorithms for structured and unstructured meshes. Development of ARM algorithms will continue along several directions. These directions include algorithms for parallel architectures, techniques for the solution of partial differential equations on adaptive meshes, mesh generation, and algorithms for nontraditional or generic applications of AMR. Dissemination of AMR algorithms is also a goal of the project. AMR algorithms are perceived as difficult to meld to current algorithms. The authors are developing tools that diminish this perception and allow more computational scientists to use AMR within their own work.
Date:
August 1, 1997
Creator:
Saltzman, J.S.; Brown, D.L.; Brislawn, K.D.; Chesshire, G.S.; Quinlan, D.J. & Berger, M.
Object Type:
Report
System:
The UNT Digital Library
Addressing nuclear and hostile environment challenges with intelligent automation
None
Date:
August 4, 1997
Creator:
Grasz, E. L. & Perez, M. L.
Object Type:
Article
System:
The UNT Digital Library
Adsorption on nanosurfaces: A detailed look at metal clusters using infrared spectroscopy
A technique known as infrared photodissociation spectroscopy is being used at Argonne to probe the intimate details of how molecules and atoms adsorb onto metal clusters. Clusters of transition metal atoms, produced by laser vaporization of a metal target, are allowed to react with small molecules, producing cluster complexes whose properties mimic those of the small metal-containing particles that make up many industrial catalysts. A powerful infrared laser is used to excite the characteristic vibrations of the atoms or molecules adsorbed on the surfaces of the clusters, causing the complexes to fragment. The resulting photodissociation spectrum is capable of revealing whether the adsorbed molecules have undergone a chemical reaction after sticking to the cluster surface. This techniques has been used to show that methyl alcohol molecules readily adsorb to the surfaces of small iron clusters, but do not undergo further reaction once they are there. This behavior is fundamentally different from that observed on macroscopic iron surfaces, where methyl alcohol readily reacts to form smaller fragment species. It is anticipated that these experiments will contribute to the understanding of particle size effects and their influence on reaction mechanisms and pathways in heterogeneous catalysis systems.
Date:
August 1, 1997
Creator:
Knickelbein, M.B.
Object Type:
Report
System:
The UNT Digital Library