Our simulations suggest that the strong peak around 4 GHz in the narrow gap observed in the measurements is generated by TE modes. Therefore, one should not worry about this peak insofar as the coupling impedance is concerned. On the other hand, some discrepancies between our simulations and the measurements are noticed and remain to be resolved.

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A model for calculating the integrated luminosity of beams stored in the Tevatron collider will be presented. The model determines the instantaneous luminosity by calculating the overlap integral of bunched beams passing through the interaction region. The calculation accounts for the variation in beam size due to the beta functions and also for effects due to finite longitudinal emittance and non-zero dispersion in the interaction region. The integrated luminosity is calculated for the beams as they evolve due to processes including collisions and intrabeam scattering. The model has been applied to both the extant and upgraded Tevatron collider, but is not limited to them. The original motivation for developing the computer model was to determine the reduction in luminosity due to beams with non-zero longitudinal emittances. There are two effects: the transverse beam size is increased where the dispersion is non-zero; the finite length of the beam bunch combined with an increasing /beta/ function results in an increased transverse beam size at the ends of the bunch. The derivation of a sufficiently useful analytic expression for the luminosity proved to be intractable. Instead, a numerical integration computer program was developed to calculate the luminosity in the presence of a finite …

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We present the results of comparisons of performances of several tracking or/and analysis codes. The basic purpose of this program was to assess reliability and accuracy of these codes, i.e. to determine the so-called "error bars" for the predicted values of tunes and other lattice functions as a minimum and, if possible, to discover potential difficulties with underlying physical models in these codes, inadequate algorithms, residual bugs and the like. Not only we have been able to determine the error bars, which for instance for the tunes at dp/p = +1% are Δv$sub x$ = 0.0027, Δv$sub y$ = 0.0010, but also our program has brought about improvements of several codes.

This paper discusses the following topics on cooling water design on the superconducting super collider; low conductivity water; industrial cooling water; chilled water systems; and radioactive water systems. (LSP)

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The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different lectronegativities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experimental studies of NO adsorption, reaction probing, study state rate measurement, and transient kinetic study. A better understanding of the role of additive on the synthesis reaction may allow us to use chemical additives to manipulate the catalytic properties of Rh- and Ni-based catalysts for producing high yields of ethanol from syngas.

The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different lectronegativities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experimental studies of NO adsorption, reaction probing, study state rate measurement, and transient kinetic study. A better understanding of the role of additive on the synthesis reaction may allow us to use chemical additives to manipulate the catalytic properties of Rh- and Ni-based catalysts for producing high yields of ethanol from syngas.

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During this quarter the studies on the selective desulfurization of coal were initiated. Specifically most of our efforts this quarter were place in developing selective reaction chemistries within a supercritical carbon dioxide system that would provide significant desulfurization of the organic matrix of coal. The first system of interest is the possible desulfurization of coal by oxidation with solvated cupric ions. The reaction of copper chloride with sulfur moieties in coal was first studied by Lompa-Krzymien. (As mention in the original proposal). In the case of Lompa-Krzymien's work this reaction was claimed to yield desulfurization rates as high as 95% for Prince Coal from Nova Scotia. Later work by Singh et al. confirmed that coal could be desulfurized by copper chloride but the percentage desulfurization was always lower than that described by LompaKrzymien. Now that we have managed to dissolve the oxidant in a supercritical system, we will search for conditions under which the redox reaction is allowed in the supercritical state. In addition, we will be running parallel reactions of the model coal compounds in the pure liquid modifier to provide a reference for the reactivity of the oxidant in liquids. We will also be looking at the possible …

During this quarter the studies on the selective desulfurization of coal were initiated. Specifically most of our efforts this quarter were place in developing selective reaction chemistries within a supercritical carbon dioxide system that would provide significant desulfurization of the organic matrix of coal. The first system of interest is the possible desulfurization of coal by oxidation with solvated cupric ions. The reaction of copper chloride with sulfur moieties in coal was first studied by Lompa-Krzymien. (As mention in the original proposal). In the case of Lompa-Krzymien`s work this reaction was claimed to yield desulfurization rates as high as 95% for Prince Coal from Nova Scotia. Later work by Singh et al. confirmed that coal could be desulfurized by copper chloride but the percentage desulfurization was always lower than that described by LompaKrzymien. Now that we have managed to dissolve the oxidant in a supercritical system, we will search for conditions under which the redox reaction is allowed in the supercritical state. In addition, we will be running parallel reactions of the model coal compounds in the pure liquid modifier to provide a reference for the reactivity of the oxidant in liquids. We will also be looking at the possible …

The Superconducting Super Collider project will require the construction of nearly 9400 magnets of which 1800 are quadrupoles each 4.32 m long. These magnets use niobium-titanium superconducting cables with a current of 6500 A/turn to get a high magnetic field gradient and focalize the particles beam. After the QA and QB quadruples, a new quadrupole, called QC, has been conceived. It is a 4 cm bore accelerator type, with a new collar design and a field gradient of 214 T/m that is lower than the one in QA. The new collar design consists mainly in a two pieces symmetrical and thicker collar which provides a complete support to the coils. This paper will analyze the magnetic field and the stress and strain distribution. The results show that this collar is a big improvement over the previous, especially in terms of stiffness, which is not explained only by the thicker collar but also by a different pole angle. 4 refs.

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Rockwell International requested an analysis of the existing plant site water supply distribution system at Rocky Flats, Colorado, to determine its adequacy. On September 26--29, 1988, Hughes Associates, Inc., Fire Protection Engineers, accompanied by Rocky Flats Fire Department engineers and suppression personnel, conducted water flow tests at the Rocky Flats plant site. Thirty-seven flows from various points throughout the plant site were taken on the existing domestic supply/fire main installation to assure comprehensive and thorough representation of the Rocky Flats water distribution system capability. The analysis was completed in four phases which are described, together with a summary of general conclusions and recommendations.

In order to raise the threshold beam current of instabilities in the fixed target run, it is required to increase the longitudinal emittance, and hence the bunch length. The bunch spreader used a noise generator through a sharp-cut ban pass filter (BPF) instead of a coherent signal. In that filter, the pass band frequency was near twice the synchrotron frequency 2f/sub s/. The bandwidth of the filter was fixed between 350Hz and 600Hz, though twice the synchrotron frequency changed from 500Hz to 300Hz after transition in Main Ring. The noise through the filter is applied to an RF amplitude modulator. In the Tevatron, where the synchrotron frequency f/sub s/ varies from 120Hz to 40Hz during acceleration, the noise is applied to a phase shifter at the frequency of f/sub s/. So, we need a tunable filter which tracks 2f/sub s/ in the Main Ring and f/sub s/ in the Tevatron. This note describes details of improved bunch spreader modules using a tunable filter used in both the Main Ring and the Tevatron. A brief description about this module along with a beam test done in the Main Ring is shown. 3 refs., 6 figs.

This report discusses the following topics on a Nuclear Power Plant operator advisor based on artificial Intelligence Technology; Workstation conversion; Software Conversion; V V Program Development Development; Simulator Interface Development; Knowledge Base Expansion; Dynamic Testing; Database Conversion; Installation at the Perry Simulator; Evaluation of Operator Interaction; Design of Man-Machine Interface; and Design of Maintenance Facility.

This report discusses the following topics on a Nuclear Power Plant operator advisor based on artificial Intelligence Technology; Workstation conversion; Software Conversion; V&V Program Development Development; Simulator Interface Development; Knowledge Base Expansion; Dynamic Testing; Database Conversion; Installation at the Perry Simulator; Evaluation of Operator Interaction; Design of Man-Machine Interface; and Design of Maintenance Facility.

This work originates from the proposal MHD Compressor-Expander Conversion System Integrated with a GCR Inside a Deployable Reflector''. The proposal concerned an innovative concept of nuclear, closed-cycle MHD converter for power generation on space-based systems in the multi-megawatt range. The basic element of this converter is the Power Conversion Unit (PCU) consisting of a gas core reactor directly coupled to an MHD expansion channel. Integrated with the PCU, a deployable reflector provides reactivity control. The working fluid could be either uranium hexafluoride or a mixture of uranium hexafluoride and helium, added to enhance the heat transfer properties. The original Statement of Work, which concerned the whole conversion system, was subsequently redirected and focused on the basic mechanisms of neutronics, reactivity control, ionization and electrical conductivity in the PCU. Furthermore, the study was required to be inherently generic such that the study was required to be inherently generic such that the analysis an results can be applied to various nuclear reactor and/or MHD channel designs''.

Map showing the mineral resource potential and the geology of the Fiddler Butte Wilderness Study Area

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Experiments were conducted to investigate the processes that influence the destruction of NO in the fuel rich stage of the reburning process. The objective is to gain a better understanding of the mechanisms that control the fate of coal nitrogen in the fuel rich zone of a combustion process. Time resolved profiles of temperature, major (CO{sub 2}, CO, H{sub 2}O, O{sub 2}, H{sub 2} and N{sub 2}), nitrogenous (NO, HCN and NH{sub 3}) and hydrocarbon (CH{sub 4} and C{sub 2}H{sub 2}) species were obtained for various reburning tests. A slow continuous source of HCN was observed in the reburn zone for most tests. HCN formation from NO + CH{sub i} reactions would partially explain this trend. It has been proposed in the past that these reactions would be fast (less than 0.1s) and the produced HCN would be short lived. However, evidence was provided in this study indicating that NO + CH{sub i} reactions might contribute to HCN formation at longer residence times in the reburn zone. Reactions of molecular nitrogen with hydrocarbon radicals were determined to be a significant source of HCN formation, especially as NO levels decreased in the reburn zone. The results of several tests would justify …

A combustor has been designed in order to retard the formation of nitrogen oxides by injection of reburning fuel. The design and the rebuilding of the new combustor was completed. Several new features were incorporated in the new design so that it would last longer. The design and construction of the furnace are discussed in this report. (VC)