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Alignment of the Fermilab D0 Detector (open access)

Alignment of the Fermilab D0 Detector

The Fermilab D0 detector was used for the discovery of the top quark during Run I in 1996. It is currently being upgraded to exploit the physics potential to be presented by the Main Injector and the Tevatron Collider during Run II in the Fall of 2000. Some of the essential elements of this upgrade is the upgrade of the Solenoid Magnet, the Central Fiber Tracker, the Preshower Detectors, the Calorimeter System, and the Muon System. This paper discusses the survey and alignment of the these detectors with emphasis on the Muon detector system. The alignment accuracy is specified as better than 0.5mm. A combination of the Laser Tracker, BETS, and V-STARS systems are used for the survey.
Date: July 20, 2001
Creator: Oshinowo, Babatunde O'Sheg
System: The UNT Digital Library
Analytical Solution for Subsurface Gas Flow to a Well Induced by Surface Pressure Fluctuations (open access)

Analytical Solution for Subsurface Gas Flow to a Well Induced by Surface Pressure Fluctuations

A simple analytical model is presented for predicting subsurface gas flow to a vadose zone well in response to atmospheric pressure fluctuations (barometric pumping). The effective radial permeability (kr) in the vicinity of the well is determined during model calibration using less than two weeks of data. By combining the flow solution with a solution for the vertical gas pressure, only atmospheric pressure data are required to predict the induced flow through a well. The ability to quantitatively predict naturally induced flow in vadose zone wells by simple and inexpensive measurements is invaluable for systems using barometric pumping for remediation.
Date: June 20, 2001
Creator: Rossabi, J.
System: The UNT Digital Library
Application of a Sixth Order Generalized Stress Function To Determine Limit Loads for Plates with Triangular Penetration Patterns (open access)

Application of a Sixth Order Generalized Stress Function To Determine Limit Loads for Plates with Triangular Penetration Patterns

The capabilities to obtain limit load solutions of plates with triangular penetration patterns using fourth order functions to represent the collapse surface has been presented in previous papers. These papers describe how equivalent solid plate elastic-perfectly plastic finite element capabilities are generated and demonstrated how such capabilities can be used to great advantage in the analysis of tubesheets in large heat exchanger applications. However, these papers have pointed out that although the fourth order functions can produce sufficient accuracy for many practical applications, there are situations where improvements in the accuracy of inplane and transverse shear are desirable. This paper investigates the use of a sixth order function to represent the collapse surface for improved accuracy of the inplane response. Explicit elastic-perfectly plastic finite element solutions are obtained for unit cells representing an infinite array of circular penetrations arranged in an equilateral triangular array. These cells are used to create a numerical representation of the complete collapse surfaces for a number of ligament efficiencies (h/P where h is the minimum ligament width and P is the distance between hole centers). Each collapse surface is then fit to a sixth order function that satisfies the periodicity of the hole pattern. Sixth-order …
Date: December 20, 2001
Creator: Gordon, J.L. & Jones, D.P.
System: The UNT Digital Library
Application of Sensitivity and Uncertainty Analysis Methods to a Validation Study for Weapons-Grade Mixed-Oxide Fuel (open access)

Application of Sensitivity and Uncertainty Analysis Methods to a Validation Study for Weapons-Grade Mixed-Oxide Fuel

At the Oak Ridge National Laboratory (ORNL), sensitivity and uncertainty (S/U) analysis methods and a Generalized Linear Least-Squares Methodology (GLLSM) have been developed to quantitatively determine the similarity or lack thereof between critical benchmark experiments and an application of interest. The S/U and GLLSM methods provide a mathematical approach, which is less judgment based relative to traditional validation procedures, to assess system similarity and estimate the calculational bias and uncertainty for an application of interest. The objective of this paper is to gain experience with the S/U and GLLSM methods by revisiting a criticality safety evaluation and associated traditional validation for the shipment of weapons-grade (WG) MOX fuel in the MO-1 transportation package. In the original validation, critical experiments were selected based on a qualitative assessment of the MO-1 and MOX contents relative to the available experiments. Subsequently, traditional trending analyses were used to estimate the {Delta}k bias and associated uncertainty. In this paper, the S/U and GLLSM procedures are used to re-evaluate the suite of critical experiments associated with the original MO-1 evaluation. Using the S/U procedures developed at ORNL, critical experiments that are similar to the undamaged and damaged MO-1 package are identified based on sensitivity and uncertainty …
Date: July 20, 2001
Creator: Dunn, M.E.
System: The UNT Digital Library
Barriers and opportunities: A review of selected successful energy-efficiency programs (open access)

Barriers and opportunities: A review of selected successful energy-efficiency programs

In industry, barriers may exist at various points in the decision making process, and in the implementation and management of measures to improve energy efficiency. Barriers may take many forms, and are determined by the business environment and include decision-making processes, energy prices, lack of information, a lack of confidence in the information, or high transaction costs for obtaining reliable information, as well as limited capital availability. Other barriers are the ''invisibility'' of energy efficiency measures and the difficulty of quantifying the impacts, and slow diffusion of innovative technology into markets while firms typically under-invest in R and D, despite the high pay-backs. Various programs try to reduce the barriers to improve the uptake of innovative technologies. A wide array of policies has been used and tested in the industrial sector in industrialized countries, with varying success rates. We review some new approaches to industrial energy efficiency improvement in industrialized countries, focusing on voluntary agreements.
Date: March 20, 2001
Creator: Worrell, Ernst & Price, Lynn
System: The UNT Digital Library
Battery Usage and Thermal Performance of the Toyota Prius and Honda Insight for Various Chassis Dynamometer Test Procedures: Preprint (open access)

Battery Usage and Thermal Performance of the Toyota Prius and Honda Insight for Various Chassis Dynamometer Test Procedures: Preprint

This study describes the results from the National Renewable Energy Laboratory's (NREL) chassis dynamometer testing of a 2000 model year Honda Insight and 2001 model year Toyota Prius. The tests were conducted for the purpose of evaluating the battery thermal performance, assessing the impact of air conditioning on fuel economy and emissions, and providing information for NREL's Advanced Vehicle Simulator (ADVISOR).
Date: November 20, 2001
Creator: Kelly, K. J.; Mihalic, M. & Zolot, M.
System: The UNT Digital Library
Beam loss and collimation in the Fermilab 16 GeV proton driver (open access)

Beam loss and collimation in the Fermilab 16 GeV proton driver

A high beam power of 1.15 MW in the proposed 16-GeV Proton Driver [1] implies serious constraints on beam losses in the machine. The main concerns are the hands-on maintenance and ground-water activation. Only with a very efficient beam collimation system can one reduce uncontrolled beam losses to an allowable level. The results on tolerable beam loss and on a proposed beam collimation system are summarized in this paper. A multi-turn particle tracking in the accelerator defined by all lattice components with their realistic strengths and aperture restrictions, and halo interactions with the collimators is done with the STRUCT code [2]. Full-scale Monte Carlo hadronic and electromagnetic shower simulations in the lattice elements, shielding, tunnel and surrounding dirt with realistic geometry, materials and magnetic field are done with the MARS14 code [3]. It is shown that the proposed 3-stage collimation system, allows localization of more than 99% of beamloss in a special straight section. Beam loss in the rest of the accelerator is 0.2 W/m on average.
Date: July 20, 2001
Creator: Alexandr I. Drozhdin, Oleg E. Krivosheev and Nikolai V. Mokhov
System: The UNT Digital Library
Beam loss, residual radiation, and collimation and shielding in the Fermilab booster (open access)

Beam loss, residual radiation, and collimation and shielding in the Fermilab booster

During its 30 years of operation, the Fermilab Booster has served only as an injector for the relatively low repetition rate proton accelerator complex. With the construction of an 8 GeV target station for the 5 Hz MiniBooNE neutrino beam and rapid multi-batch injection into the Main Injector for the NuMI experiment, the demand for Booster protons will increase dramatically over the next few years. This implies serious constraints on beam losses in the machine. A collimation system and shielding design based on realistic Monte Carlo simulations are presented. A two-stage beam collimation system with local shielding has been designed. It provides adequate protection of the Booster components and environment by localizing operational losses. This loss control is a key to the entire future Fermilab high energy physics program.
Date: July 20, 2001
Creator: al., Alexandr I. Drozhdin et
System: The UNT Digital Library
The BTeV DAQ and Trigger System - Some throughput, usability and fault tolerance aspects (open access)

The BTeV DAQ and Trigger System - Some throughput, usability and fault tolerance aspects

As presented at the last CHEP conference, the BTeV triggering and data collection pose a significant challenge in construction and operation, generating 1.5 Terabytes/second of raw data from over 30 million detector channels. We report on facets of the DAQ and trigger farms. We report on the current design of the DAQ, especially its partitioning features to support commissioning of the detector. We are exploring collaborations with computer science groups experienced in fault tolerant and dynamic real-time and embedded systems to develop a system to provide the extreme flexibility and high availability required of the heterogeneous trigger farm ({approximately} ten thousand DSPs and commodity processors). We describe directions in the following areas: system modeling and analysis using the Model Integrated Computing approach to assist in the creation of domain-specific modeling, analysis, and program synthesis environments for building complex, large-scale computer-based systems; System Configuration Management to include compilable design specifications for configurable hardware components, schedules, and communication maps; Runtime Environment and Hierarchical Fault Detection/Management--a system-wide infrastructure for rapidly detecting, isolating, filtering, and reporting faults which will be encapsulated in intelligent active entities (agents) to run on DSPs, L2/3 processors, and other supporting processors throughout the system.
Date: August 20, 2001
Creator: al., Erik Edward Gottschalk et
System: The UNT Digital Library
A C++ particle data table interface (open access)

A C++ particle data table interface

As a result of discussions within the HEP community, we have written a C++ package which can be used to maintain a table of particle properties, including decay mode information. The classes allow for multiple tables and accept input from a number of standard sources.
Date: March 20, 2001
Creator: Garren, Lynn A.
System: The UNT Digital Library
Chemical Kinetic Characterization of Combustion Toluene (open access)

Chemical Kinetic Characterization of Combustion Toluene

A study is performed to elucidate the chemical kinetic mechanism of combustion of toluene. A detailed chemical kinetic mechanism for toluene was improved by adding a more accurate description of the phenyl + O{sub 2} reaction channels. Results of the chemical kinetic mechanism are compared with experimental data obtained from premixed and nonpremixed systems. Under premixed conditions, predicted ignition delay times are compared with new experimental data obtained in shock tube. Also, calculated species concentration histories are compared to experimental flow reactor data from the literature. Critical conditions of extinction and ignition were measured in strained laminar flows under nonpremixed conditions in the counterflow configuration. Numerical calculations are performed using the chemical kinetic mechanism at conditions corresponding to those in the experiments. Critical conditions of extinction and ignition are predicted and compared with the experimental data. For both premixed and nonpremixed systems, sensitivity analysis was used to identify the reaction rate constants that control the overall rate of oxidation in each of the systems considered.
Date: March 20, 2001
Creator: Pitz, W. J.; Seiser, R.; Bozzelli, J. W.; Da Costa, I.; Fournet, R.; Billaud, F. et al.
System: The UNT Digital Library
Colorado Public Utility Commission's Xcel Wind Decision (open access)

Colorado Public Utility Commission's Xcel Wind Decision

In early 2001 the Colorado Public Utility Commission ordered Xcel Energy to undertake good faith negotiations for a wind plant as part of the utility's integrated resource plan. This paper summarizes the key points of the PUC decision, which addressed the wind plant's projected impact on generation cost and ancillary services. The PUC concluded that the wind plant would cost less than new gas-fired generation under reasonable gas cost projections.
Date: September 20, 2001
Creator: Lehr, R. L. (NRUC/NWCC); Nielsen, J. (Land and Water Fund of the Rockies); Andrews, S. & Milligan, M. (National Renewable Energy Laboratory)
System: The UNT Digital Library
Comparison of Computational Estimations of Reactivity Margin From Fission Products and Minor Actinides in PWR Burnup Credit (open access)

Comparison of Computational Estimations of Reactivity Margin From Fission Products and Minor Actinides in PWR Burnup Credit

This paper has presented the results of a computational benchmark and independent calculations to verify the benchmark calculations for the estimation of the additional reactivity margin available from fission products and minor actinides in a PWR burnup credit storage/transport environment. The calculations were based on a generic 32 PWR-assembly cask. The differences between the independent calculations and the benchmark lie within 1% for the uniform axial burnup distribution, which is acceptable. The {Delta}k for KENO - MCNP results are generally lower than the other {Delta}k values, due to the fact that HELIOS performed the depletion part of the calculation for both the KENO and MCNP results. The differences between the independent calculations and the benchmark for the non-uniform axial burnup distribution were within 1.1%.
Date: July 20, 2001
Creator: Sanders, C. E.
System: The UNT Digital Library
Corrections to the Fermilab recycler focusing with end shim changes (open access)

Corrections to the Fermilab recycler focusing with end shim changes

The Recycler Ring Gradient Magnets were designed with end shims which correct the field shape (harmonic components up to 10-pole). A standard correction was employed at one end to correct the average properties. A variable correction was used at the other end to correct individual magnet variations during the fabrication process. Initial Recycler operation revealed that the quadrupole fields did not produce the desired tune. In part, this was due to the sextupole of the end-shim interacting with the curved orbit through the straight magnet. The standard end-shim was replaced on all regular cell gradient magnets. Details of these end corrections and the resulting successful modification of the lattice are described.
Date: July 20, 2001
Creator: al., David E Johnson et
System: The UNT Digital Library
Corrosion tests of LWR fuels-nuclide release rates. (open access)

Corrosion tests of LWR fuels-nuclide release rates.

None
Date: December 20, 2001
Creator: Finn, P.A.; Tsai, Y. & Cunnane, J.C.
System: The UNT Digital Library
Decay Heat Code Validation Activities at ORNL: Supporting Expansion of NRC Regulatory Guide 3.54 (open access)

Decay Heat Code Validation Activities at ORNL: Supporting Expansion of NRC Regulatory Guide 3.54

Oak Ridge National Laboratory (ORNL) has a long history of involvement in the development and validation of the ORIGEN series of isotope summation codes and nuclear data libraries, widely recognized and used to predict the decay heat for spent nuclear fuel. In particular, the ORIGEN-S code, the depletion/decay module of the SCALE code system, has been extensively validated using experimental isotopic assay data and decay heat measurements for commercial spent fuel. This work was used in the development of the technical basis for NRC Regulatory Guide 3.54 on spent fuel decay heat. The bulk of the experimental data used to validate spent fuel decay heat predictions are from programs of the 1970s and 1980s and consequently involve older-design fuel assemblies with a relatively low enrichment and burnup. This has led to a situation where the spent fuel now being discharged from operating reactors extends well beyond the regime of the experimental data and area of code applicability based o n the data. The absence of validation data for modern fuel designs has potentially serious consequences for decay heat predictions in terms of added safety factors to account for larger uncertainties and lower volumetric transport and storage capacities.
Date: July 20, 2001
Creator: Gauld, I. C.
System: The UNT Digital Library
Development and Applications of a Prototypic SCALE Control Module for Automated Burnup Credit Analysis (open access)

Development and Applications of a Prototypic SCALE Control Module for Automated Burnup Credit Analysis

Consideration of the depletion phenomena and isotopic uncertainties in burnup-credit criticality analysis places an increasing reliance on computational tools and significantly increases the overall complexity of the calculations. An automated analysis and data management capability is essential for practical implementation of large-scale burnup credit analyses that can be performed in a reasonable amount of time. STARBUCS is a new prototypic analysis sequence being developed for the SCALE code system to perform automated criticality calculations of spent fuel systems employing burnup credit. STARBUCS is designed to help analyze the dominant burnup credit phenomena including spatial burnup gradients and isotopic uncertainties. A search capability also allows STARBUCS to iterate to determine the spent fuel parameters (e.g., enrichment and burnup combinations) that result in a desired k{sub eff} for a storage configuration. Although STARBUCS was developed to address the analysis needs for spent fuel transport and storage systems, it provides sufficient flexibility to allow virtually any configuration of spent fuel to be analyzed, such as storage pools and reprocessing operations. STARBUCS has been used extensively at Oak Ridge National Laboratory (ORNL) to study burnup credit phenomena in support of the NRC Research program.
Date: July 20, 2001
Creator: Gauld, I. C.
System: The UNT Digital Library
Development of cos-theta Nb{sub 3}Sn dipole magnets for VLHC (open access)

Development of cos-theta Nb{sub 3}Sn dipole magnets for VLHC

This paper describes the double aperture dipole magnets developed for a VLHC based on Nb{sub 3}Sn superconductor, a cos-theta coil, cold and warm iron yokes, and the wind-and-react fabrication technique. Status of the model R and D program, strand and cable and other major component development are also discussed.
Date: July 20, 2001
Creator: al., Alexander Zlobin et
System: The UNT Digital Library
Development of high data readout rate pixel module and detector hybridization at Fermilab (open access)

Development of high data readout rate pixel module and detector hybridization at Fermilab

This paper describes the baseline design and a variation of the pixel module to handle the data rate required for the BTeV experiment at Fermilab. The present prototype has shown good electrical performance characteristics. Indium bump bonding is proven to be capable of successful fabrication at 50 micron pitch on real detectors. For solder bumps at 50 micron pitch, much better results have been obtained with the fluxless PADS processed detectors. The results are adequate for our needs and our tests have validated it as a viable technology.
Date: March 20, 2001
Creator: al., Sergio Zimmermann et
System: The UNT Digital Library
Diffraction in CDF: Run I results and plans for Run II (open access)

Diffraction in CDF: Run I results and plans for Run II

Results on diffraction obtained by the CDF Collaboration in Run I of the Fermilab Tevatron {bar p}p collider are reviewed. New results are reported on soft double diffraction and diffractive J/{psi} production. The CDF program for diffractive studies in Run II is briefly discussed.
Date: July 20, 2001
Creator: Goulianos, K.
System: The UNT Digital Library
Direct index of refraction measurement at extreme ultraviolet wavelength region with a novel interferometer (open access)

Direct index of refraction measurement at extreme ultraviolet wavelength region with a novel interferometer

None
Date: November 20, 2001
Creator: Chang, Chang; Anderson, Erik H.; Naulleau, Patrick P.; Gullikson, Eric; Goldberg, Kenneth A. & Attwood, David T.
System: The UNT Digital Library
Electromagnetic fields in cased borehole (open access)

Electromagnetic fields in cased borehole

Borehole electromagnetic (EM) measurements, using fiberglass-cased boreholes, have proven useful in oil field reservoir characterization and process monitoring (Wilt et al., 1995). It has been presumed that these measurements would be impossible in steel-cased wells due to the very large EM attenuation and phase shifts. Recent laboratory and field studies have indicated that detection of EM signals through steel casing should be possible at low frequencies, and that these data provide a reasonable conductivity image at a useful scale. Thus, we see an increased application of this technique to mature oilfields, and an immediate extension to geothermal industry as well. Along with the field experiments numerical model studies have been carried out for analyzing the effect of steel casing to the EM fields. The model used to be an infinitely long uniform casing embedded in a homogeneous whole space. Nevertheless, the results indicated that the formation signal could be accurately recovered if the casing characteristics were independently known (Becker et al., 1998; Lee el al., 1998). Real steel-cased wells are much more complex than the simple laboratory models used in work to date. The purpose of this study is to develop efficient numerical methods for analyzing EM fields in realistic …
Date: July 20, 2001
Creator: Lee, Ki Ha; Kim, Hee Joon & Uchida, Toshihiro
System: The UNT Digital Library
Emerging energy-efficient technologies for industry (open access)

Emerging energy-efficient technologies for industry

For this study, we identified about 175 emerging energy-efficient technologies in industry, of which we characterized 54 in detail. While many profiles of individual emerging technologies are available, few reports have attempted to impose a standardized approach to the evaluation of the technologies. This study provides a way to review technologies in an independent manner, based on information on energy savings, economic, non-energy benefits, major market barriers, likelihood of success, and suggested next steps to accelerate deployment of each of the analyzed technologies. There are many interesting lessons to be learned from further investigation of technologies identified in our preliminary screening analysis. The detailed assessments of the 54 technologies are useful to evaluate claims made by developers, as well as to evaluate market potentials for the United States or specific regions. In this report we show that many new technologies are ready to enter the market place, or are currently under development, demonstrating that the United States is not running out of technologies to improve energy efficiency and economic and environmental performance, and will not run out in the future. The study shows that many of the technologies have important non-energy benefits, ranging from reduced environmental impact to improved productivity. …
Date: March 20, 2001
Creator: Worrell, Ernst; Martin, Nathan; Price, Lynn; Ruth, Michael; Elliott, Neal; Shipley, Anna et al.
System: The UNT Digital Library
Encouraging the Domestic Small Turbine Market (open access)

Encouraging the Domestic Small Turbine Market

The state incentives for home-based renewables in the domestic market continue to grow and change creating opportunities for the small wind turbine market. Tracking the opportunities to get small wind turbines included in incentive policies and developing a proactive industry approach is important because market changes can occur anytime. There are near-term opportunities to work with states in developing their strategies for disbursing system benefit charges, adding tags to existing policies for other small renewables to include small wind, and developing state-wide net metering programs. Other opportunities to improve the domestic market exist but will be quite challenging to implement. Other opportunities include federal tax credits, state wind access laws, equipment verification for specific states, and leasing programs for small wind turbines.
Date: September 20, 2001
Creator: Forsyth, T.
System: The UNT Digital Library