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Simulation of hanging file experiments with CALOR89

Description: This note presents the comparison of CALOR89 simulation with the hanging file'' test measurements conducted at Fermilab during the period of Sep 91--Jan 92. The purpose of this study is to benchmark CALOR89 code against the experimental data to enhance its reliability and predictive power. Seven hanging file configurations were simulated. The measured values of e/{pi} ratio (the ratio of electron to pion signal at the same energy), hadronic and electromagnetic resolutions were compared with the simulations. The depth profiles of the hadronic and electromagnetic showers are also compared.
Date: January 1, 1992
Creator: Job, P.K.; Price, L.E.; Proudfoot, J. (Argonne National Lab., IL (United States). High Energy Physics Div.); Handler, T. (Tennessee Univ., Knoxville, TN (United States)) & Gabriel, T.A. (Oak Ridge National Lab., TN (United States))
Partner: UNT Libraries Government Documents Department

Some physics requirements for triggering in the intermediate tracking system of SDC

Description: I have investigated trigger requirements for the intermediate tracking system of the SDC detector, using muons in the final states of some physics processes of interest and relevance to the program envisaged to be pursued at the SSC. The study is done at the physics event generator level with the PYTHIA package, augmented by a very simplistic simulation of the momentum measurement expected from the intermediate tracking system. For the range in pseudorapidity of {vert bar}{eta}{vert bar} = 1.7--2.5, I find a subdivision into four basic bins sufficient to ensure that the width of the transverse momentum trigger threshold will not be dominated by the lack of knowledge of the polar angle. In addition, the azimuthal resolution has be better than 1 mrad to allow transverse momentum thresholds from p{sub t}{approx}10 GeV/c up to and beyond p{sub t}=20 GeV/c to be implemented which are needed to accomplish the physics goals. 10 figs., 1 tab.
Date: November 22, 1991
Creator: Trost, H.J.
Partner: UNT Libraries Government Documents Department

Shower counter resolution scaling

Description: The EM shower counter for the SDC detector has a resolution expression containing two stochastic terms plus a constant term. Recent measurements clarifying the sources of these terms are presented here. 3 refs., 4 figs.
Date: October 14, 1991
Creator: Kirk, T.B.W.
Partner: UNT Libraries Government Documents Department

Advanced fuel cell development progress report, April--June 1977. [Electrolyte mixtures of Li/sub 2/CO/sub 3/-K/sub 2/CO/sub 3/ containing rod-shaped particles of. beta. -LiAlO/sub 2/]

Description: This report describes advanced fuel cell research and development activities at Argonne National Laboratory (ANL) during the period April--June 1977. These efforts have been directed toward understanding and improvement of molten-carbonate-electrolyte fuel cells operating at temperatures near 923 K. A primary focus of the work has been on developing electrolyte structures which have high strength and conductivity, as well as good electrolyte retention, and on developing methods of synthesis for electrolyte structures that are amenable to mass production. A low temperature synthesis which produces material having rodlike particles of ..beta..--LiAlO/sub 2/ has been refined and is now used for preparing electrolytes. Cell testing is essential for understanding and evaluating individual component behavior and the interactions of the components under realistic operating conditions. Most of the testing to date has been conducted in a 7-cm (2/sup 3///sub 4/-in.)-dia cylindrical cell with Type 316 stainless steel housings and current collectors, a nickel anode, and a nickel oxide cathode. Testing has begun to probe the roles of anode, cathode, and electrolyte in cell performance, and has provided verification of an acceptable technique for prevention of seal corrosion for at least 1400 hours. Components evaluation and development include post-test analysis and evaluation of cell components and materials, as well as development of out-of-cell diagnostic tests for the individual components. Particular attention is being paid to evaluation of the physical properties of the electrolyte and of the porous nickel and nickel oxide electrodes.
Date: August 1, 1977
Creator: Ackerman, J P; Kinoshita, K; Sim, J W; Swaroop, R & Nelson, P A
Partner: UNT Libraries Government Documents Department

Analysis of the leak-detection system for top welds of EBR-II fuel elements

Description: An analysis of the leak detector used to check the top welds on EBR-II fuel elements was performed. Data were obtained to allow calculation of volumes of the metering chamber and test chamber at each station of the leak detector. These volumes and a mathematical model were used to calculate decrease in pressure with time for each station. Values for calibrated leaks and unknown leak rates were compared with calculated ones. The calculated results for the two calibrated leaks agreed with the observed pressure-time results for the two leaks. Results show that determining the volumes of each leak-detector station allows the leakrate sensitivity to be readily calculated for each station. One leak-detector station could not detect a minimum leak rate of 2 x 10/sup -4/ std cm/sup 3/ sec at 40 atm, which is the current specification. The other four stations could meet the specification. Suggestions are given for periodic calibration of the leak detectors as well as precautions that must be observed to achieve optimum sensitivity when operating the leak detector. (auth)
Date: May 1, 1973
Creator: Hudman, G.D. & Walters, L.C.
Partner: UNT Libraries Government Documents Department

Unix version of CALOR89 for calorimeter applications

Description: CALOR89 is a system of coupled Monte Carlo particle transport computer codes which has been successfully employed for the estimation of calorimeter parameters in High Energy Physics. In the past CALOR89 has been running on various IBM machines and on CRAY X-MP at Lawrence Livermore Lab. These machines had non-unix operating systems. In this report we present a UNIX version of CALOR89, which is especially suited for the UNIX work stations. Moreover CALOR89 is also been supplemented with two new program packages which makes it more user friendly. CALPREP is a program for the preparation of the input files for CALOR89 in general geometry and ANALYZ is an analysis package to extract the final results from CALOR89 relevant to calorimeters. This report also provides two script files LCALOR and PCALOR. LCALOR runs CALOR89 sequences of programs and EGS4 for a given configuration sequentially on a single processor and PCALOR concurrently on a multiprocessor unix workstation.
Date: May 12, 1992
Creator: Handler, T. (Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy); Job, P.K.; Price, L.E. (Argonne National Lab., IL (United States). High Energy Physics Div.) & Gabriel, T.A. (Oak Ridge National Lab., TN (United States))
Partner: UNT Libraries Government Documents Department

Unix version of CALOR89 for calorimeter applications

Description: CALOR89 is a system of coupled Monte Carlo particle transport computer codes which has been successfully employed for the estimation of calorimeter parameters in High Energy Physics. In the past CALOR89 has been running on various IBM machines and on CRAY X-MP at Lawrence Livermore Lab. These machines had non-unix operating systems. In this report we present a UNIX version of CALOR89, which is especially suited for the UNIX work stations. Moreover CALOR89 is also been supplemented with two new program packages which makes it more user friendly. CALPREP is a program for the preparation of the input files for CALOR89 in general geometry and ANALYZ is an analysis package to extract the final results from CALOR89 relevant to calorimeters. This report also provides two script files LCALOR and PCALOR. LCALOR runs CALOR89 sequences of programs and EGS4 for a given configuration sequentially on a single processor and PCALOR concurrently on a multiprocessor unix workstation.
Date: May 12, 1992
Creator: Handler, T.; Job, P. K.; Price, L. E. & Gabriel, T. A.
Partner: UNT Libraries Government Documents Department

Chemical Engineering Division fast-neutron dosimetry annual report, July 1975--June 1976

Description: One of the objectives of the Dosimetry and Damage Analysis Center is to provide standardized dosimetry technology for materials-study programs within the ERDA Division of Magnetic Fusion Energy. Current efforts have included characterization of neutron environments in terms of fluence and spectral distribution for materials experiments conducted at the Lawrence Livermore Laboratory's (LLL) Rotating Target Neutron Source and at the LLL-Davis Cyclograaff. Environment characterization efforts at Brookhaven National Laboratory's High Flux Beam Reactor and those pertaining to an enriched-uranium converter for the ANL CP-5 reactor are also described. The capability of calculating material radiation damage parameters associated with these neutron environments is demonstrated. Average fission yields determined from two fast-neutron irradiations and one thermal-neutron irradiation are compiled for laboratories participating in the interlaboratory Reaction Rate program. These results are in excellent agreement with literature values. Progress on the development of /sup 10/B- and /sup 6/Li-loaded liquid scintillation detectors for detecting very low intensity neutrons is presented. Material purification tests and performance tests of scintillation mixtures are described.
Date: January 1, 1976
Creator: Heinrich, R R; Greenwood, L R; Kennerley, R J; Chellew, N R; Popek, R J; Malewicki, R L et al.
Partner: UNT Libraries Government Documents Department

Computer programs for describing the dynamic behavior of EBR-II

Description: Kinetic studies are performed at EBR-II to ensure that the dynamic characteristics of the reactor indicate integrity of the system and surrounding environment. These studies are done by analysis of power perturbations caused by a drop rod and a rod oscillator. The power perturbation following a rod drop is first analyzed by inverse-kinetics procedures to obtain a time-dependent reactivity. This reactivity is further fitted to a feedback transfer fanction characteristic of linear differential equations. The power perturbation caused by the oscillator is Fourier-analyzed to obtain a series of Fourier coefficients representing the reactor transfer function directly. The feedback transfer function is then obtained from this and the zero-power transfer function. 11 references. (auth)
Date: September 1, 1973
Creator: Larson, H.A.; Engen, I.A.; Tuck, M.R. & Hyndman, R.W.
Partner: UNT Libraries Government Documents Department

Computer facilities for Isabelle data handling

Description: The analysis of data produced by Isabelle experiments will need a large system of computers. Included in the array should be a substantial computer system at each Isabelle intersection in use. These systems must include enough computer power to keep experimenters aware of the status of the experiment. This will require at least one very fast sophisticated processor in the system, the size depending on the experiment. Other features of the intersection systems must be a good, high speed graphic display, ability to record data on magnetic tape at 500 to 1000 KB, and a high-speed link to a central computer. The operating system software must support multiple interactive users. A substantially larger capacity computer system, shared by the six intersection region experiments, must be available with good turnaround for experimenters while Isabelle is running. The computer mainframes should ideally be compatible members of the same family of computers. A very large computation load will be generated by the post experiment data reduction. Much of this may have to be run at lower priority. A computer support group will be required to maintain the computer system and to provide and maintain software common to all experiments. Such software support may include providing a compatible compiler. Special superfast computing hardware or special function processors constructed with microprocessor circuitry may be necessary both in the data gathering and data processing work. Thus, both the local and central processors should be chosen with the possibility of interfacing such devices in mind.
Date: January 1, 1977
Creator: Kramer, M.A.; Love, W.A.; Miller, R.J. & Zeller, M.
Partner: UNT Libraries Government Documents Department

Equivalent exclusive and inclusive multiperipheral descriptions

Description: It is shown that for each exclusive model satisfying a multiperipheral principle, there is an inclusive model satisfying a multiperipheral principle which predicts the same values for all exclusive and inclusive differential cross sections. The converse statement is also true. The relation between these models is thus one to one: formal expression is given for the transformation between one model and the other. These expressions have the form of the nonrelativistic Lippman-Schwinger equation. The proof is given first for multi- Regge models having poles and cuts as the J plane singularities. It is then generalized to models with multiparticle thresholds. The physical origin of such thresholds is discussed. Also treated are the further generalizations of the proof to models having N quantum number channels and to models having any general multiperipheral structure. (auth)
Date: January 1, 1974
Creator: Pinsky, S.S. & Thomas, G.H.
Partner: UNT Libraries Government Documents Department

Evaluation of ex-reactor loading event on high-fluence EBR-II control-rod thimble 5E3

Description: A Type 304 stainless steel EBR-II control-rod thimble (CRT 5E3) with high fluence was damaged while undergoing dimensional evaluation. The damage, which occurred when the thimble was inadvertently loaded in a bending mode, consisted of rather localized but extensive fracture. An elastic stress analysis of the bending mode was done on the thimble, using semimembrane shell theory. The analysis disclosed several important aspects that the simpler and more commonly employed techniques do not disclose. The hoop stress was found to be the most probable to initiate failure in that crack initiation would most likely result from localized yielding from the hoop stress. Structural assessment of the failure with the aid of scanning electron, transmission electron, and optical microscopy qualitatively supported the stress analysis in that the failure was associated with localized yielding and was accompanied by some, but limited, ductility. There was no evidence that a premature failure occurred (e.g., a failure at stresses below the yield stress of the material and which might be associated with grain-boundary embrittlement). (auth)
Date: February 1, 1973
Creator: Flinn, J.E.; Krajcinovic, D.; Phipps, R.D.; Franklin, D.G. & Miller, S.C.
Partner: UNT Libraries Government Documents Department

Environmental and technological implications of a theta-pinch fusion power plant

Description: The environmental effects of this conceptual design were evaluated and found to be little different from other electrical power plants in most regards. Exceptions include a very small release of tritium, a low-hazard isotope, and relatively large amounts of radioactive material which must be either stored on site for eventual reprocessing or permanently discarded. These radioactive materials are nonvolatile and should not pose a difficult disposal problem, although some of the material may remain radioactive for hundreds of years. Natural resources required to build and operate the reference plant are not excessive except perhaps in the case of niobium and beryllium. The accident, sabotage, etc., problems of the plant are very minimal and although accidents can be postulated which would be inconvenient and costly within the plant, the probability of sizable impact on the surroundings is so as to be incredible.
Date: May 6, 1974
Creator: Coultas, T. A.; Burke, R. J. & Krakowski, R. A.
Partner: UNT Libraries Government Documents Department

Present status of computational tools for maglev development

Description: High-speed vehicles that employ magnetic levitation (maglev) have received great attention worldwide as a means of relieving both highway and air-traffic congestion. At this time, Japan and Germany are leading the development of maglev. After fifteen years of inactivity that is attributed to technical policy decisions, the federal government of the United States has reconsidered the possibility of using maglev in the United States. The National Maglev Initiative (NMI) was established in May 1990 to assess the potential of maglev in the United States. One of the tasks of the NMI, which is also the objective of this report, is to determine the status of existing computer software that can be applied to maglev-related problems. The computational problems involved in maglev assessment, research, and development can be classified into two categories: electromagnetic and mechanical. Because most maglev problems are complicated and difficult to solve analytically, proper numerical methods are needed to find solutions. To determine the status of maglev-related software, developers and users of computer codes were surveyed. The results of the survey are described in this report. 25 refs.
Date: October 1, 1991
Creator: Wang, Z.; Chen, S.S. & Rote, D.M.
Partner: UNT Libraries Government Documents Department

Validated heat-transfer and pressure-drop prediction methods based on the discrete element method: Phase 1, Three-dimensiional roughness

Description: A computer program based on the discrete element method has been developed and validated to compute friction factors and Nusselt numbers for fully developed turbulent flow and heat transfer in pipes with three-dimensional roughness elements. Computational results are compared with appropriate cases from heat transfer experiments in the literature. The predictions were in general in very good agreement with the experimental data.
Date: February 1, 1992
Creator: Taylor, R.P. & Hodge, B.K. (Mississippi State Univ., MS (United States). Dept. of Mechanical and Nuclear Engineering)
Partner: UNT Libraries Government Documents Department

Survey of foreign maglev systems

Description: Magnetic levitation (maglev) transportation systems represent an innovative technology that promises to provide pollution-free, contact-free, high-speed ground transportation for the twenty-first century. Great interest in maglev systems has been developing in the United States over the past two years under the auspices of the US National Maglev Initiative. The objective of the survey presented in this report is to provide the US maglev community with information on various maglev concepts that were developed in foreign countries over the past two decades. The main maglev systems included in the survey are the German Transrapid series and the M-Bahn, the Japanese HSST and MLU series, and the British Birmingham. Each maglev system is introduced and discussed according to its type, historical development, unique features, current status, and future prospects. Advantages and disadvantages of each system are briefly noted.
Date: July 1, 1992
Creator: He, J. L.; Rote, D. M. & Coffey, H. T.
Partner: UNT Libraries Government Documents Department