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Microcrystalline silicon growth for heterojunction solar cells. Second quarterly report, 1 April 1983-30 June 1983
In this reporting period, a single source of evaporation with B mixed with highly doped Si was used instead of the co-evaporation of separate Si and B sources. The purpose was to reduce possible carbon contamination. The results of both the heterojunction or heteroface structures, however, were similar to last quarter when evaporation was used. The best Voc of the heterojunction was about 460mV and no improvement in Voc in the heteroface structure, was observed; slight Voc degradation occurred. A study of the p m-Si/p c-Si structure showed a negative Voc in many cases. The highest /sup 0/C voltage was up to -150mV. This indicated that the interface properties between the two materials are such that instead of repelling minority carriers from the substrate carrier, collection actually occurred. This structure defeated the purpose, but it might also mean that n-type m-Si could be beneficial and should be included in future study. Another study of cells made in the part of substrates not covered by m-Si resulted in performance lower than the controls. This indicated possible substrate degradation in the process, the extent of which will be studied in the future.
Date:
January 1, 1983
Creator:
Iles, P. A.; Leung, D. C. & Fang, P. H.
Object Type:
Report
System:
The UNT Digital Library
Drug metabolizing enzyme systems and their relationship to toxic mechanisms
The metabolism and toxicity of 3-methylfuran (3-MF) are described. The major product of metabolic activation of 3-MF appears to be disemicarbazones. Cursory description of toxic effects of 3-MF on lung and kidneys are provided. 18 refs.
Date:
January 1, 1983
Creator:
Boyd, M. R.; Ravindranath, V.; Burka, L. T.; Dutcher, J. S.; Franklin, R. B.; Statham, C. N. et al.
Object Type:
Article
System:
The UNT Digital Library
Low Cost Solar Array Project cell and module formation research area. Process research of non-CZ silicon material. Final report, November 26, 1980-September 30, 1983
The primary objective of the work reported was to investigate high-risk, high-payoff research areas associated with the Westinghouse process for producing photovoltaic modules using non-Czochralski sheet material. These tasks were addressed: technical feasibility study of forming front and back junctions using liquid dopant techniques, liquid diffusion mask feasibility study, application studies of antireflective material using a meniscus coater, ion implantation compatibility/feasibility study, and cost analysis. (LEW)
Date:
January 1, 1983
Creator:
Campbell, R.B.
Object Type:
Report
System:
The UNT Digital Library
Studies in Coal Liquefaction with Application to the SRC and Related Processes. Final Report, November 1978-September 1983
The objective of this research program is to systematically investigate, characterize, and delineate the effects of changes in process operating conditions, equipment configuration, and nature of raw materials upon the kinetics, mechanism, and extent of coal dissolution, heteroatom removal, and hydrogenation in the SRC and closely related processes, for the purpose of providing an increased fundamental understanding of SRC process chemistry as well as guidelines and recommendations leading to economic and technical improvements in SRC technology. The program objectives were carried out in cooperation with the Souther Services' SRC pilot plant operation at Wilsonville, Alabama, and with the Rust Engineering subsidiary of Wheelabrator-Frye, Inc. The program is composed of the following 3 tasks: (1) mechanistic studies of coal particle dissolution; (2) catalysis by coal mineral matter; and (3) analytical support. A summary of the most important aspects of the work is presented in this report. Detailed results can be found by referring to the twenty quarterly reports and over thirty technical papers and presentations resulting from work under this contract.
Date:
January 1, 1983
Creator:
Tarrer, A. R.; Guin, J. A. & Curtis, C. W.
Object Type:
Report
System:
The UNT Digital Library
Data needs for the track structure of alpha particles and electrons in water
We have made calculations of the ionization spectra for alpha particle and electron tracks in water. We have also computed the number of ions created per micrometre of track length, the energy distribution of the secondaries, and the energy expended per ion pair created. Our aim is less toward theoretical derivations than to obtain a numerically accurate description of the track structure at all energies in a form suitable for biomedical applications. 13 references.
Date:
January 1, 1983
Creator:
Pagnamenta, A.
Object Type:
Article
System:
The UNT Digital Library
Centrifugal slurry pump wear and hydraulic studies. Phase II report. Experimental studies
This report describes the work performed by Ingersoll-Rand Research, Inc., under Phase II, Experimental Studies for the contract entitled, Centrifugal Slurry Pump Wear and Hydraulic Studies. This work was carried out for the US Department of Energy under Contract No. DE-AC-82PC50035. The basic development approach pursued this phase is presented, followed by a discussion on wear relationships. The analysis, which resulted in the development of a mathematical wear model relating pump life to some of the key design and operating parameters, is presented. The results, observations, and conclusions of the experimental investigation on small scale pumps that led to the selected design features for the prototype pump are discussed. The material investigation was performed at IRRI, ORNL and Battelle. The rationale for selecting the materials for testing, the test methods and apparatus used, and the results obtained are presented followed by a discussion on materials for a prototype pump. In addition, the prototype pump test facility description, as well as the related design and equipment details, are presented. 20 references, 53 figures, 13 tables.
Date:
January 1, 1983
Creator:
Mistry, D.; Cooper, P.; Biswas, C.; Sloteman, D. & Onuschak, A.
Object Type:
Report
System:
The UNT Digital Library
Variational methods in steady state diffusion problems
Classical variational techniques are used to obtain accurate solutions to the multigroup multiregion one dimensional steady state neutron diffusion equation. Analytic solutions are constructed for benchmark verification. Functionals with cubic trial functions and conservational lagrangian constraints are exhibited and compared with nonconservational functionals with respect to neutron balance and to relative flux and current at interfaces. Excellent agreement of the conservational functionals using cubic trial functions is obtained in comparison with analytic solutions.
Date:
January 1, 1983
Creator:
Lee, C.E.; Fan, W.C.P. & Bratton, R.L.
Object Type:
Article
System:
The UNT Digital Library
Results on nu/sub. mu. /e Elastic Scattering
A measurement of the nu/sub ..mu../e elastic scattering cross section is presented. These data analyzed were run at the Brookhaven AGS wide band neutrino beam ((E/sub nu/) = 1.5 GeV).
Date:
January 1, 1983
Creator:
Ahrens, L. A.; Aronson, S. H.; Connolly, P. L.; Callas, J. L.; Cutts, D.; Amako, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Experience with a saddle field ion source for sputtering
A discussion is presented concerning the method of setting up a saddle field ion source for sputtering thin films. Preliminary results will be presented for sputtering rates of different materials.
Date:
January 1, 1983
Creator:
Thomas, G.E.
Object Type:
Article
System:
The UNT Digital Library
Spiral kicker for the beam abort system
A brief study was carried out to determine the feasibility of a special kicker to produce a damped spiral beam at the beam dump for the beam abort system. There appears to be no problem with realizing this concept at a reasonably low cost.
Date:
January 1, 1983
Creator:
Martin, R.L.
Object Type:
Article
System:
The UNT Digital Library
Fluidized bed waste heat recovery system. Annual report, 1 October 1981-31 March 1983
An agreement was reached in July 1982 with the Aluminum Company of America regarding the Massena operations in New York. Since that agreement, a specification has been published which characterizes the waste stream and includes ALCOA, DOE and Aerojet design requirements. Installation of the test unit has been engineered in preliminary form by ALCOA in close liaison with Aerojet and details are being established. A subcontract has been awarded for the design and fabrication of the fluid bed heat exchanger. Initial thermal analyses are complete and a preliminary arrangement layout has been started. Materials corrosion tests were conducted by Oak Ridge National Laboratory on samples of fluid bed heat exchanger materials under the range of temperatures expected. Samples included carbon steel, stainless steels and Incoloy. Test atmospheres included hydrogen chloride and chlorine corrosive species. A study was completed of the research and development which would be necessary to raise the gas inlet temperature rating of the heat exchanger above 1100/sup 0/F. This study has been formalized and submitted in a topical report and discussions are ongoing regarding an activity (Task VI) added to the present contract to conduct high temperature R and D work.
Date:
January 1, 1983
Creator:
Williams, H. W. & Unmack, K. E.
Object Type:
Report
System:
The UNT Digital Library
Determination of trace impurities in uranium hexafluoride by an inductively coupled argon plasma spectrometer
A procedure has been developed to determine 21 trace impurity elements in uranium hexafluoride, using inductively coupled argon plasma emission spectrometry (ICAP). The method consists of a liquid-liquid extraction to separate uranium from the trace impurities with a mixture of tri-(2-ethyl-hexyl)-phosphate (TEHP) and heptane. The raffinate containing the elements is subsequently analyzed by ICAP. The impurity elements which can be analyzed by this method are: Al, B, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Na, Ni, Pb, Sb, Sn, Ti, V and Zn.
Date:
January 6, 1983
Creator:
Short, B. W.; Spring, H. S. & Grant, R. L.
Object Type:
Report
System:
The UNT Digital Library
Progress in numerical calculations of ion-atom collisions
An ion-atom collision produces a time dependent perturbation of a many fermion system. In this collision, excitation, ionization and charge transfer can occur. The driving mechanism for these processes may be thought of as the potentials seen by individual electrons at any given separation of the projectile and target nuclei. If we think of these potentials as belonging to the target (a nucleus and electrons) and the projectile (another nucleus and electrons) then as detected by an electron the potentials change because: (a) the target and projectile change position, and (b) electrons on the target and projectile change states. Most work in the past fifty years has concentrated on solving the independent particle model (IPM). Cracks are beginning to appear in this model which only allows for type (a) changes in the potential. But in a short review we shall have quite enough to do in understanding the progress made in the last decade on the IPM. This paper is divided into three parts. The first deals with how to reduce the IPM to the single electron model (SEM). The second is on a new method where charge transfer is important. The third confronts some standard models with modern calculations.
Date:
January 1, 1983
Creator:
Reading, J.F.; Ford, A.L. & Becker, R.L.
Object Type:
Article
System:
The UNT Digital Library
Measurements of the deposition rates of radon daughters on indoor surfaces
The deposition rates of radon daughters on indoor surfaces have been measured by exposing the window of a proportional counter to the air of a house with high concentrations of radon and its daughters. Deposition velocities for unattached RaA and RaB of approximately 4 mm sec/sup -1/ were obtained by dividing the deposition rates by the concentrations of unattached daughters in the air. These results agree with those obtained by other workers but are dependent on the assumptions made about the fractions of the daughters which are attached to the atmospheric aerosol.
Date:
January 1, 1983
Creator:
Toohey, R.E.; Essling, M.A.; Rundo, J. & Hengde, W.
Object Type:
Article
System:
The UNT Digital Library
Heavy ion excitation and photon decay of giant resonances
Results are presented for excitation of giant multipole resonances by inelastic scattering of 350 and 500 MeV /sup 16/O projectiles from /sup 90/Zr and /sup 208/Pb. The giant quadrupole resonance is excited with large cross sections and a very large resonance peak to continuum ratio is obtained. Extracted cross sections agree with DWBA calculations which use standard collective model form factors. Using 380 MeV 170 to excite the giant resonances, the ..gamma..-ray decay has been measured for the giant quadrupole resonance region of /sup 208/Pb. 10 references.
Date:
January 1, 1983
Creator:
Bertrand, F.E.; Beene, J.R. & Sjoreen, T.P.
Object Type:
Report
System:
The UNT Digital Library
Swelling in several commercial alloys irradiated to very high neutron fluence
Swelling values have been obtained from a set of commercial alloys irradiated in EBR-II to a peak fluence of 2.5 x 10/sup 23/ n/cm/sup 2/ (E > 0.1 MeV) or approx. 125 dpa covering the range 400 to 650/sup 0/C. The alloys can be ranked for swelling resistance from highest to lowest as follows: the martensitic and ferritic alloys, the niobium based alloys, the precipitation strengthened iron and nickel based alloys, the molybdenum alloys and the austenitic alloys.
Date:
January 1, 1983
Creator:
Gelles, D. S. & Pintler, J. S.
Object Type:
Report
System:
The UNT Digital Library
Quality assurance aspects of the major procurements for the Large Coil Test Facility
The Large Coil Test Facility (LCTF) project is comprised of the test stand, supporting cryogenic systems, instrumentation, data acquisition, and utilities necessary for testing the large superconducting coils of the Large Coil Program (LCP). A significant portion of the facility hardware has been obtained through procurement actions with industrial suppliers. This paper addresses the project's experience in formulation and execution of quality assurance (QA) actions relative to several of the major items procured. Project quality assurance planning and specific features related to procurement activities for several of the more specialized test facility components are described. These component procurements include: (1) the coil test stand's major structural item (the bucking post) purchased from foreign industry; (2) fabrication and testing of high-current power supplies; (3) industrial fabrication of specialized instrumentation (voltage-tap signal conditioning modules); and (4) fabrication, installation, and testing of the liquid helium piping system.
Date:
January 1, 1983
Creator:
Taylor, D. J.; Thompson, P. B.; Ryan, T. L.; Queen, C. C.; Halstead, E. L.; Murphy, J. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Dose reduction at nuclear power plants
The collective dose equivalent at nuclear power plants increased from 1250 rem in 1969 to nearly 54,000 rem in 1980. This rise is attributable primarily to an increase in nuclear generated power from 1289 MW-y to 29,155 MW-y; and secondly, to increased average plant age. However, considerable variation in exposure occurs from plant to plant depending on plant type, refueling, maintenance, etc. In order to understand the factors influencing these differences, an investigation was initiated to study dose-reduction techniques and effectiveness of as low as reasonably achievable (ALARA) planning at light water plants. Objectives are to: identify high-dose maintenance tasks and related dose-reduction techniques; investigate utilization of high-reliability, low-maintenance equipment; recommend improved radioactive waste handling equipment and procedures; examine incentives for dose reduction; and compile an ALARA handbook.
Date:
January 1, 1983
Creator:
Baum, J. W. & Dionne, B. J.
Object Type:
Article
System:
The UNT Digital Library
Design desiderata for a laminar flow quadrupole-focused acceleration column
The Pierce design acceleration column has been widely used to accelerate high current beams. It operates well in the space charge limited condition, and will produce beams with a temperature comparable with that of the source. It is restricted in current density, however, by the Child-Langmuir relation. If the ion source itself is not the limiting constraint, then the achievable current density is limited by the electric field at which sparking occurs. One sees clearly that the achievable current density decreases as one goes to higher voltages. This can be easily overcome by using electrostatic quadrupole focusing in the acceleration column. Now it can be shown that the space charge limited current density in a constant energy quadrupole transport channel is greater than that if one assumes that the electric fields on the quadrupoles can be as high in the ion source extraction electric fields. In practice, this is a conservative assumption. It follows that if the beam can be transported a large distance at the C-L current density limit, it can surely be accelerated as it goes from quadrupole to quadrupole. Hence, the necessity of having a high gradient acceleration column goes away.
Date:
January 1, 1983
Creator:
Maschke, A.W.
Object Type:
Article
System:
The UNT Digital Library
Type II successful supernovae, the anatomy of shocks: neutrino emission and the adiabatic index
Hydrodynamic calculations of stellar collapse in Type II Supernova are described using a variable stiffness and compressibility for the nuclear equation of state at high density. Initial models employing a relatively small mass core with low central entropy are necessary to achieve viable shocks; near success the models are sensitive to both neutrino emission and the high density equation of state. The treatment of neutrino production and transport is sketched and recent results reported.
Date:
January 1, 1983
Creator:
Kahana, S.; Baron, E. & Cooperstein, J.
Object Type:
Report
System:
The UNT Digital Library
Preliminary analysis of fission gas behavior and fuel response during an LMFBR operational transient
This summary presents results obtained from a preliminary analysis of gas behavior and oxide fuel response during an LMFBR operational transient. The DiMelfi and Deitrich model is extrapolated to operational transient regimes to delineate brittle versus ductile fuel response modes. All pertinent parameters necessary for application of the DiMelfi and Deitrich model were obtained from the LIFE-3 code.
Date:
January 1, 1983
Creator:
Liu, Y. Y.
Object Type:
Article
System:
The UNT Digital Library
Torsional ultrasonic technique for reactor vessel liquid level measurement
We have undertaken a detailed study of an ultrasonic waveguide employed as a level, density, and temperature sensor. The purpose of this study was to show how such a device might be used in the nuclear power industry to provide reliable level information with a multifunction sensor, thus overcomming several of the errors that led to the accident at Three Mile Island. Some additional work is needed to answer the questions raised by the current study, most noticably the damping effects of flowing water.
Date:
January 1, 1983
Creator:
Dress, W. B.
Object Type:
Article
System:
The UNT Digital Library
Lattice for a low-field superconducting super collider
In this paper I present a simple lattice suitable for a Superconducting Super Collider (super-super). This super-super lattice is designed for storage of 20-TeV protons using bending magnets with peak fields of B = 2.1 T. The low-field value is chosen so that the present work may complement presentations of highfield lattices (5 T and 6.5 T) given elsewhere at this workshop, and so that this lattice may be used as a working tool to identify field-dependent aspects of the accelerator design.
Date:
January 1, 1983
Creator:
Neuffer, D.
Object Type:
Article
System:
The UNT Digital Library
Analysis of Sweet Lake geopressured-geothermal aquifer
The Sweet Lake geopressured-geothermal aquifer, located southeast of Lake Charles, Louisiana, is an aquifer modeled by a two-dimensional geopressured-geothermal simulator. This aquifer is a sandstone within the Frio formation at depths between 15,000 to 15,640 ft with a net porous thickness of 250 ft, a calculated in-situ permeability (from drawdown data) of 17 md, an estimated porosity of 24 percent, a uniaxial compaction coefficient of 4.5 x 10/sup -7/ psi/sup -1/ and a solution gas-water ratio of 11 SCF/STB all at the initial reservoir pressure of 12,060 psi. These parameters are typically pressure sensitive in geopressured-geothermal aquifers and are critically important to aquifer performance. Several simulation experiments are conducted which investigate the effects of varying initial values for these parameters with the experimentally determined values as means. The simulations give both optimistic and pessimistic expectations for aquifer performance. The expected life of the geopressured-geothermal well is reported for each simulation.
Date:
January 1, 1983
Creator:
Andrade, M.; Rago, F. M.; Ohkuma, H.; Sepehrnoori, K.; Peters, E. & Dorfman, M.
Object Type:
Report
System:
The UNT Digital Library