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Survey techniques developed to align stacked beamlines at CEBAF
The Continuous Electron Beam Accelerator Facility (CEBAF) in Newport News, Virginia is a new accelerator designed to produce 4 GeV 200 micro-amp continuous wave beams for nuclear physics research. It consists of two superconducting linacs each accelerating electrons by 400 MeV and linked by arcs allowing five pass recirculation. These linacs form the straight sections in a racetrack shaped accelerator contained in over 1.3 km of tunnel. The beam lines will consist of 42 superconducting accelerating cryomodules (in the linacs only), over 400 dipoles, 650 quadrupoles, and 100 sextupoles, most of the which are concentrated in the two arc sections of the machine. It is here that the single beam fine from the linacs is split into five beams of offering energy and transported to the opposite linac where it is recombined into a single beam to again pass through a linac and receive additional acceleration. These recirculation arcs are designed to maintain beam quality through a lattice which is achromatic, isochronous and whose length is equal to a multiple number of RF wavelengths. The short term relative alignment tolerances coupled with the beam fine design reflect the beam quality issues while absolute positioning determines the range of adjustment needed …
Date:
April 1, 1994
Creator:
Curtis, C. J.; Oren, W. & Tremblay, K. J.
Object Type:
Report
System:
The UNT Digital Library
A systems engineering approach to AIS accreditation
The systems engineering model provides the vehicle for communication between the developer and the customer by presenting system facts and demonstrating the system in an organized form. The same model provides implementors with views of the system`s function and capability. The authors contend that the process of obtaining accreditation for a classified Automated Information System (AIS) adheres to the typical systems engineering model. The accreditation process is modeled as a ``roadmap`` with the customer represented by the Designed Accrediting Authority. The ``roadmap`` model reduces the amount of accreditation knowledge required of an AIS developer and maximizes the effectiveness of participation in the accreditation process by making the understanding of accreditation a natural consequence of applying the model. This paper identifies ten ``destinations`` on the ``road`` to accreditation. The significance of each ``destination`` is explained, as are the potential consequences of its exclusion. The ``roadmap,`` which has been applied to a range of information systems throughout the DOE community, establishes a paradigm for the certification and accreditation of classified AISs.
Date:
April 1, 1994
Creator:
Harris, L. M. & Hunteman, W. J.
Object Type:
Article
System:
The UNT Digital Library
Team Dallas, Number 40, April 1994
A group of documents pertaining to the Gay Games IV announcements and upcoming events before the ceremony.
Date:
April 1994
Creator:
unknown
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Technical and management considerations in conducting type B shipping container tests
The Code of Federal Regulations (CFR) mandate that type B shipping containers are capable of surviving specific drop tests. One approach for demonstrating compliance to the CFRs is to drop test a shipping container. This paper will discuss the technical and management considerations in conducting such drop tests on the 9975 family of shipping containers. For both technical and management considerations this paper will comment on loading the shipping container, dropping the shopping container, and examination of the shipping container after the drop tests.
Date:
April 1, 1994
Creator:
Whitney, M. A.; Leader, D. R. & Phipps, D. P.
Object Type:
Article
System:
The UNT Digital Library
Technical basis for evaluating electromagnetic and radio-frequency interference in safety-related I&C systems
This report discusses the development of the technical basis for the control of upsets and malfunctions in safety-related instrumentation and control (I&C) systems caused by electromagnetic and radio-frequency interference (EMI/RFI) and power surges. The research was performed at the Oak Ridge National Laboratory (ORNL) and was sponsored by the USNRC Office of Nuclear Regulatory Research (RES). The motivation for research stems from the safety-related issues that need to be addressed with the application of advanced I&C systems to nuclear power plants. Development of the technical basis centered around establishing good engineering practices to ensure that sufficient levels of electromagnetic compatibility (EMC) are maintained between the nuclear power plant`s electronic and electromechanical systems known to be the source(s) of EMI/RFI and power surges. First, good EMC design and installation practices need to be established to control the impact of interference sources on nearby circuits and systems. These EMC good practices include circuit layouts, terminations, filtering, grounding, bonding, shielding, and adequate physical separation. Second, an EMI/RFI test and evaluation program needs to be established to outline the tests to be performed, the associated test methods to be followed, and carefully formulated acceptance criteria based on the intended environment to ensure that the …
Date:
April 1, 1994
Creator:
Ewing, P. D. & Korsah, K.
Object Type:
Report
System:
The UNT Digital Library
Technology Evaluation Workshop Report for Tank Waste Chemical Characterization
A Tank Waste Chemical Characterization Technology Evaluation Workshop was held August 24--26, 1993. The workshop was intended to identify and evaluate technologies appropriate for the in situ and hot cell characterization of the chemical composition of Hanford waste tank materials. The participants were asked to identify technologies that show applicability to the needs and good prospects for deployment in the hot cell or tanks. They were also asked to identify the tasks required to pursue the development of specific technologies to deployment readiness. This report describes the findings of the workshop. Three focus areas were identified for detailed discussion: (1) elemental analysis, (2) molecular analysis, and (3) gas analysis. The technologies were restricted to those which do not require sample preparation. Attachment 1 contains the final workshop agenda and a complete list of attendees. An information package (Attachment 2) was provided to all participants in advance to provide information about the Hanford tank environment, needs, current characterization practices, potential deployment approaches, and the evaluation procedure. The participants also received a summary of potential technologies (Attachment 3). The workshop opened with a plenary session, describing the background and issues in more detail. Copies of these presentations are contained in Attachments 4, …
Date:
April 1, 1994
Creator:
Eberlein, S. J.
Object Type:
Report
System:
The UNT Digital Library
Temperature dependence of the two-photon absorption spectrum of poly(di-n-hexylsilane)
We have measured the temperature dependence of the intensity of the lowest energy two-photon absorption line in poly(di-n-hexylsilane) and find that it does not change between ambient temperature and 14 K. The line width decreases by about a factor of three.
Date:
April 1, 1994
Creator:
Kepler, R. G. & Soos, Z. G.
Object Type:
Article
System:
The UNT Digital Library
Temperature distribution in microwave sintering of alumina cylinders
Small cylinders of high-purity alumina were encased in a `casket` of low-density zirconia insulation and heated to sintering temperature in a large multi-mode microwave oven. Optical fiber sensors were used to monitor the temperature at several locations in the system. It was found that the alumina samples heat faster than the zirconia insulation at temperatures above 1000 C, and that the temperature distribution in the sample is essentially uniform during the heating process. A two-dimensional mathematical model of the heat transfer process was developed which reproduces the essential features of the observed phenomena. Literature data for all temperature-dependent properties were incorporated into the model. The model suggests that the alumina samples absorb a significant fraction of the microwave energy.
Date:
April 1, 1994
Creator:
Thomas, J. R., Jr.; Katz, J. D. & Blake, R. D.
Object Type:
Report
System:
The UNT Digital Library
Tensile strength of dried gelcast green bodies
Ceramic green bodies were prepared by three different techniques, dry pressing, slip casting, and gelcasting. The tensile strength of the green bodies was measured using a diametral compression test. It was found that the gelcast samples were from 2 to 20 times stronger than the conventionally formed green bodies. SEM examination of the gelcast samples revealed a homogeneous, brittle fracture surface indicating a very uniform distribution of the binder and excellent dispersion of the ceramic powder.
Date:
April 1, 1994
Creator:
Nunn, S. D.; Omatete, O. O.; Walls, C. A. & Barker, D. L.
Object Type:
Article
System:
The UNT Digital Library
Test plan for preparing the Rapid Transuranic Monitoring Laboratory for field deployment
This plan describes experimental work that will be performed during fiscal year 1994 to prepare the Rapid Transuranic Monitoring Laboratory (RTML) for routine field use by US Department of Energy (DOE) Environmental Restoration and Waste Management programs. The RTML is a mobile, field-deployable laboratory developed at the Idaho National Engineering Laboratory (INEL) that provides a rapid, cost-effective means of characterizing and monitoring radioactive waste remediation sites for low-level radioactive contaminants. Analytical instruments currently installed in the RTML include an extended-range, germanium photon analysis spectrometer with an automatic sample changer; two, large-area, ionization chamber alpha spectrometers; and four alpha continuous air monitors. The RTML was field tested at the INEL during June 1993 in conjunction with the Buried Waste Integrated Demonstration`s remote retrieval demonstration. The major tasks described in this test plan are to (a) evaluate the beta detectors for use in screening soil samples for {sup 90}Sr, (b) upgrade the alpha spectral analysis software programs, and (c) upgrade the photon spectral analysis software programs.
Date:
April 1, 1994
Creator:
McIsaac, C. V.; Sill, C. W.; Gehrke, R. J.; Killian, E. W. & Watts, K. D.
Object Type:
Report
System:
The UNT Digital Library
Testing of the SAIC facets on the stretched-membrane dish
A dish structure sized for a 25 kW electric dish/generator system has been installed at the National Solar Thermal Test Facility (NSTTF). The dish is used as an optical test bed for prototype stretched-membrane facets. Sandia procured twelve (12) stretched-membrane facets from Science Applications International Corporation (SAIC) for installation on the dish structure. Individual facet optical performance was measured using the 2f test method under development at Sandia. Four facets were tested on-sun using the test truss at the NSTTF prior to installation on the dish structure. During the final stages of the structure assembly, the facets were installed for testing. A distant light source alignment technique was used to align the facets to a 9 meter focal length. The alignment and focus were optimized with on-sun measurements of individual facet characteristics. On-sun flux maps of the image were made using the Beam Characterization System. Calorimetry tests were performed using a cold water calorimeter. This data was used to create a power intercept curve and predict the power inside apertures of different sizes. The focal plane was moved to 9.95 meters and the alignment, optimization, and on-sun tests repeated. This paper presents the results of the testing on the individual …
Date:
April 1, 1994
Creator:
Grossman, J. W.; Erdman, W. W.; Houser, R. M. & Davenport, R.
Object Type:
Article
System:
The UNT Digital Library
Testing the principle of equivalence by solar neutrinos
We discuss the possibility of testing the principle of equivalence with solar neutrinos. If there exists a violation of the equivalence principle quarks and leptons with different flavors may not universally couple with gravity. The method we discuss employs a quantum mechanical phenomenon of neutrino oscillation to probe into the non-university of the gravitational couplings of neutrinos. We develop an appropriate formalism to deal with neutrino propagation under the weak gravitational fields of the sun in the presence of the flavor mixing. We point out that solar neutrino observation by the next generation water Cherenkov detectors can improve the existing bound on violation of the equivalence principle by 3-4 orders of magnitude if the nonadiabatic Mikheyev-Smirnov-Wolfenstein mechanism is the solution to the solar neutrino problem.
Date:
April 1, 1994
Creator:
Minakata, Hisakazu & Nunokawa, Hiroshi
Object Type:
Report
System:
The UNT Digital Library
Texas Construction Report: April 1994
Monthly report documenting contracts for road construction and maintentance in Texas, organized by county and district. It includes information about each project including contractor, dates, costs, and other relevant data.
Date:
April 1, 1994
Creator:
Texas. Department of Transportation. Construction and Maintenance Division.
Object Type:
Report
System:
The Portal to Texas History
Texas EMS Magazine, Volume 15, Number 2, March/April 1994
Bimonthly magazine containing news and information that pertains to Emergency Medical Service (EMS) providers. "The magazine's goals are to help organizations function professionally as EMS providers, to educate individuals so they can perform lifesaving prehospital skills under stressful conditions, and to help the public get into the EMS system when they need it" (p. 4).
Date:
April 1994
Creator:
Texas. Department of State Health Services.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Lottery Retailer Update, April 1994
Newsletter from the Texas Lottery Commission providing news and announcements, as well as other information of interest to retailers who sell lottery tickets in the state.
Date:
April 1994
Creator:
Texas Lottery Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Manufactured Housing
Technical report that analyzes the impact of the manufactured housing industry, with total estimates of multiple sectors.
Date:
April 1994
Creator:
Wright, Arthur L.; Ruch, Carlton E. & Berke, Phillip
Object Type:
Report
System:
The Portal to Texas History
Texas Parks & Wildlife, Volume 52, Number 4, April 1994
Magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date:
April 1994
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Real Estate Center Trends, Volume 7, Number 7, March 1994
Monthly report of the Texas A & M University Real Estate Center on statistics, recent news, and developments related to real estate.
Date:
April 1994
Creator:
Texas A & M University. Real Estate Center.
Object Type:
Report
System:
The Portal to Texas History
Texas Real Estate Center Trends, Volume 7, Number 8, April 1994
Monthly report of the Texas A & M University Real Estate Center on statistics, recent news, and developments related to real estate.
Date:
April 1994
Creator:
Texas A & M University. Real Estate Center.
Object Type:
Report
System:
The Portal to Texas History
Texas Register, Volume 19, Number 24, Pages 2243-2331, [April 1], 1994
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
April 1, 1994
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas State Board of Dental Examiners Newsletter, Volume 9, April 1994
Newsletter of the Texas State Board of Dental Examiners discussing legislation affecting the group, activities of the board, and other relevant information.
Date:
April 1994
Creator:
Texas State Board of Dental Examiners
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas State Board Report, Volume 52, April 1994
Monthly newsletter from the Texas State Board of Public Accountancy regarding updates and information pertaining to Texas CPAs.
Date:
April 1994
Creator:
Texas State Board of Public Accountancy
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Travel Log, April 1994
Newsletter dedicated to traveling in Texas, including information about news, locations, and events of interest to visitors as well as statistics and summaries of travel in the state.
Date:
April 1994
Creator:
Texas. Department of Transportation.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Theoretical and experimental investigations of elastic scattering spectroscopy as a potential diagnostic for tissue pathologies
The spectral distribution of the diffuse reflectance of five sizes of polystyrene microspheres has been measured with an elastic scatter spectrometer designed for optical biopsy of living tissue. The microsphere sizes are representative of the suspected scattering centers in living tissue. The experiment data are discussed and interpreted in the framework of Mie scattering theory and Monte-Carlo transport analysis. Present results support the assertion that Mie theory is necessary to describe the spectral features of elastic scatter spectroscopy in tissue.
Date:
April 1, 1994
Creator:
Boyer, J.; Mourant, J. R. & Bigio, I. J.
Object Type:
Article
System:
The UNT Digital Library