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  Partner: UNT Libraries Government Documents Department
 Decade: 1980-1989
Pion and Kaon Production of Charm and Charm-Strange States

Pion and Kaon Production of Charm and Charm-Strange States

Date: November 1, 1985
Creator: Anjos, J.C.C.; Santoro, A.F.S.; Souza, M.H.G.; /Rio de Janeiro, CBPF; Appel, J.A.; Dixon, R. et al.
Description: We propose an experiment to measure the properties of hadronic charm production using the Tagged Photon Spectrometer facility. We shall measure the flavor, x and A dependence of this process at the same time and in a single apparatus. In addition to collecting several times more charm than any completed or proposed hadronic experiment, we expect to have a sample of F mesons as much as two orders of magnitude more than published efforts. High statistiCs lifetime measurements of several charm states are expected. The experiment is proposed for the next running period. The experiment will record equal numbers of {pi} and K induced events using a fast transverse energy trigger and a modified data acquisition system capable of recording more than 300 events per second. The transverse energy trigger used in E691, providing an enrichment of about 3 over a simple interaction trigger while keeping 80% of the charmed particles, will be used. It will provide at least 300 million events to be examined for possible writing to tape. A new data acquisition system includes 'Level 3' filtering capability before writing events to tape. The experiment requires a minimal hardware extension to an existing and proven facility and will ...
Contributing Partner: UNT Libraries Government Documents Department
THEORETICAL DIFFUSION PROFILES IN SINGLE PHASE TERNARY SYSTEMS

THEORETICAL DIFFUSION PROFILES IN SINGLE PHASE TERNARY SYSTEMS

Date: February 1, 1980
Creator: Roper, G.W. & Whittle, D.P.
Description: In order to illustrate the physical meaning of the four independent interdiffusion coefficients which describe a single-phase ternary system, a range of concentration profiles and diffusion paths for the generalized diffusion couple A-10B/A-10C were plotted using three different models of diffusion coefficient behaviour. The shapes of the diffusion paths predicted by these various models were compared with that of an experimentally determined diffusion path from the cobalt solid solution of the substitutional alloy system cobalt-chromium-aluminum. The results indicate that even the most sophisticated dilute solution model fails to predict completely the behaviour of the real system.
Contributing Partner: UNT Libraries Government Documents Department
Development of Superconducting Strang and Cable with Improved Properties for Use in SSC Magnets

Development of Superconducting Strang and Cable with Improved Properties for Use in SSC Magnets

Date: February 1, 1989
Creator: Scanlan, R.M.
Description: The critical current requirement for the NbTi superconductor strand was set at 2750 A/mm{sup 2} (5 T, 4.2 K) in the SSC Conceptual Design, compared with a value of 1800 A/mm{sup 2} which was specified for the strand used in the Tevatron dipoles. In addition, a filament diameter of 5 {micro}m, instead of the 9 {micro}m diameter used in the Tevatron. was chosen to reduce field distonion at injection. In order to meet the requirements for field homogeneity, the dimensional requirements for both strand and cable were also tightened. The technical solutions employed to achieve these improved properties and the resulting specifications will be discussed.
Contributing Partner: UNT Libraries Government Documents Department
EXPERIMENTAL RESULTS ON TRAPPING A GUN PLASMA IN TORMAC P-l

EXPERIMENTAL RESULTS ON TRAPPING A GUN PLASMA IN TORMAC P-l

Date: July 1, 1981
Creator: Pincosy, P.A.; Myers, B.R.; Levine, M.A.; Feinberg, B.; Niland, R.A. & Soroka, L.
Description: A start-up scheme for producing a plasma in the biscusp field configuration of TORMAC which involves the radial injection and trapping of a toroidal gun plasma is described. The peloidal field of the external cusp coils acts as a barrier to the outward travel of the plasma ring. Interferometry and magnetic probe measurements observed the stopping of the expanding plasma ring which has a velocity of 17 cm/{micro}sec. Once stopped, the fields are arranged to hold the plasma in a magnetic well. Interferometry measurements observed a well defined outer boundary remaining stationary during the 20 {micro}sec of the measurement. The inner boundary was also in evidence as shown particularly by the particle flux distribution emanating from the cusp region. The indications are that a sheath exists having a width of 1 to 1.5 ion gyro radii in the poloidial field. Measurements of Thomson and interferometry give a T{sub e} of 15eV, a 15 {micro}sec density decay time, and a 5 {micro}sec energy decay time. These results show that this injection and trapping method is successful, and thus a higher gun plasma energy combined with a flux conserving barrier may lead to higher temperatures for testing containment in TORMAC.
Contributing Partner: UNT Libraries Government Documents Department
Crack Parameters

Crack Parameters

Date: October 31, 1985
Creator: Pitas, A. & /Fermilab
Description: One of the important variables in the design of the end cap calorimeter is the number of angular divisions that should be made in the face of the calorimeter array. While it would be ideal to have no such divisions, they are unavoidable because the maximum size for uranium sheets is less than the diameter of the array. These divisions create regions which are either partially or totally devoid of absorber and readout. It is the purpose of this note to analyze the effects of different parameters on the size of these cracks. This analysis assumes wedge shaped structures of significant depth (i.e. > 20% of the total depth). For such modules there are five variables which affect the size of a crack. They are: (1) The clearance between modules. The extent to which the module wall and the array extend into this region depends on the tolerances on the manufacture of the module. All of the module construction techniques currently under consideration have very tight tolerances (e.g. 2 mils). Therefore, this region is assumed to be void of solid material. In the C.C this region is thought to be .090 inches wide. (2) The thickness of the module walls. ...
Contributing Partner: UNT Libraries Government Documents Department
CC Carriage Lifting Extension Analysis

CC Carriage Lifting Extension Analysis

Date: August 7, 1987
Creator: Luther, R.D. & /Fermilab
Description: No abstract prepared.
Contributing Partner: UNT Libraries Government Documents Department
MATHEMATICAL MODELING OF THE LITHIUM-ALUMINUM, IRON SULFIDE BATTERY. I. THE INFLUENCE OF RELAXATION TIME OF THE CHARGING CHARACTERISTICS

MATHEMATICAL MODELING OF THE LITHIUM-ALUMINUM, IRON SULFIDE BATTERY. I. THE INFLUENCE OF RELAXATION TIME OF THE CHARGING CHARACTERISTICS

Date: January 1, 1980
Creator: Pollard, Richard & Newman, John
Description: A mathematical model of the LiAl/LiCl, KCl/FeS cell has been used to study the behavior of the system during relaxation and charging. The effects of state of charge, cell temperature, and current density are presented, and the influence of a period of relaxation on the subsequent charging operation is investigated. In addition, factors that can have a significant impact on the charging characteristics are identified.
Contributing Partner: UNT Libraries Government Documents Department
HIGH-TEMPEPATURE OXIDATION AND CORROSION OF MATERIALS PROGRAM

HIGH-TEMPEPATURE OXIDATION AND CORROSION OF MATERIALS PROGRAM

Date: March 1, 1980
Creator: Whittle, D.P.
Description: The objective of this program is to gain an understanding of the corrosion chemistry and materials behavior in high temperature environments. Of particular interest are the mechanisms of attack in environments containing more than one reactive species, for example sulfur and oxygen. Sulfur is a critical impurity in almost all energy sources and leads to accelerated, and often unacceptable rates of metal degradation. In addition, the competitive formation of potentially more than one phase as a reaction product is an important fundamental problem, and can only be truly understood if the underlying thermodynamic and transport properties of the systems, and their interrelation, are identified. Sulfur can appear in a number of forms. In entirely gaseous environments it can appear as H{sub Z}S when the oxidizing potential of the atmosphere is low, such as might exist in energy conversion systems, or as SO{sub 2}/SO{sub 3} at higher oxygen potentials, such as those produced by fuel combustion. It may also appear in sulfatic deposits, either as a solid, such as CaSO{sub 4} in fluidized bed combustion systems, as inorganic and organic sulfur compounds in coal char, or as a liquid alkali-metal sulfate in coal-ash, or turbine-blade deposits. This last year has been ...
Contributing Partner: UNT Libraries Government Documents Department
THE FEASIBILITY OF PRODUCING 11C, 13N, 15O, AND 18F WITH HEAVY-ION BEAMS

THE FEASIBILITY OF PRODUCING 11C, 13N, 15O, AND 18F WITH HEAVY-ION BEAMS

Date: May 1, 1980
Creator: Firestone, R.B.; Betlach, M.R.; Tiedje, J.M. & Firestone, M.K.
Description: The feasibility of producing the short-lived tracers {sup 11}C, {sup 13}N, {sup 15}O, and {sup 18}F with heavy-ion beams was investigated. Production cross sections for 15-MeV p, 75-MeV {sup 3}He, and 300-MeV {sup 12}C beams incident on H{sub 2}O targets were calculated using the particle evaporation code ALICE (3). These calculations predicted substantial thick target yields of all four activities with the heavier beams. Experiments were performed with 15-MeV p and 75-MeV {sup 3}He beams to check the accuracy of the theoretical calculations. Absolute product yields were measured with NaI well counters, and chemical composition was determined by GC and HPLC.
Contributing Partner: UNT Libraries Government Documents Department
Specification for 20,000 Gallon Liquid Argon Storage Tank

Specification for 20,000 Gallon Liquid Argon Storage Tank

Date: December 1, 1985
Creator: Mulholland, G.T.; Stepanek, G. & /Fermilab
Description: This specification defines the requirements for a liquid nitrogen equipped, liquid argon storage tank to be installed at Fermilab, Batavia, Illinois.
Contributing Partner: UNT Libraries Government Documents Department
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