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An advanced hadron facility: A combined kaon factory and cold-neutron source

Description: A design concept is presented for an advanced hadron facility consisting of a combined kaon factory and second generation spallation source. Our proposed facility consists of a 1.2 GeV superconducting H/sup -/ linac to bring the LAMPF energy up to 2 GeV, a multi-ring 2 GeV compressor, a shared cold-neutron and stopped-pion neutrino source, a 60 GeV 25 ..mu..Amp 6 Hz proton synchrotron, and kaon and proton experimental areas. We discuss the considerations which led to this design concept. We sum… more
Date: March 16, 1987
Creator: Thiessen, H.A.
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Partner: UNT Libraries Government Documents Department
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CC Cryostat Cooldown Test Results

Description: A cooldown of the inner vessel of the Central Calorimeter cryostat to 77K was performed during the week of October 12 in order to 'cold shock' it, i.e., to check for insulating vacuum integrity with the inner vessel cold. The conclusion from our test results is that the vessel withstood the cold shock, and the insulating vacuum remained good. Cooldown was analyzed by J.D. Fuerst in D0 note 3740.000-EN-107, dated August 19. Warmup was analyzed by T. Peterson and B.Fitzpatrick in D0 Engineering N… more
Date: October 16, 1987
Creator: Peterson, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chromosomal replicons of higher plants

Description: This brief discussion of replicons of higher plants offers a glimpse into the properties of chromosomal DNA replication. It gives evidence that the S phase of unrelated plant species is comprised of temporally ordered replicon families that increase in number with genome size. This orderly process, which assures a normal inheritance of genetic material to recipient daughter cells, is maintained at the level of replicon clusters by two mutually exclusive mechanisms, one involving the rate at whi… more
Date: March 16, 1987
Creator: Van't Hof, J.
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Partner: UNT Libraries Government Documents Department
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Computer simulation of the lasertron with a ring model

Description: The lasertron is more efficient, lighter, and smaller than a klystron, especially at outputs below 2 GHz. Higher peak output powers are possible with the lasertron, and a separate modulator is not required. These advantages are useful for rf accelerators and linear colliders. The electron dynamics are simulated to estimate the device performance limits and to design an experimental lasertron. The relativistic electron dynamics are followed from the photocathode through the acceleration region a… more
Date: March 16, 1987
Creator: Tallerico, P.J. & Coulon, J.P.
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Partner: UNT Libraries Government Documents Department
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Continental Scientific Drilling (CSD): Technology Barriers to Deep Drilling Studies in Thermal Regimes

Description: This report is the proceedings of a workshop. The primary thrust of these discussion was to identify the major key technology barriers to the Department of Energy (DOE) supported Thermal Regimes CSD projects and to set priorities for research and development. The major technological challenge is the high temperature to be encountered at depth. Specific problems derived from this issue were widely recognized among the participants and are reflected in this summary. A major concern for the projec… more
Date: January 16, 1987
Creator: Kolstad, George A. & Rowley, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Demountable vacuum seals for fusion reactor applications

Description: Demountable vacuum seals for fusion reactor applications must be compatible with the reactor environment, easily scalable, very reliable and readily maintained by remote handling methods. We are investigating gate valves as well as flanges in our efforts to provide such seals. They are all metal and scalable without becoming massive and require no axial fasteners. Preliminary tests on an initial 30 cm aluminum flange using no soft metal coatings or gaskets have given several vacuum tight closur… more
Date: October 16, 1987
Creator: Batzer, T. H. & Call, W. R.
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Partner: UNT Libraries Government Documents Department
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Design of achromatic bending systems in the presence of space charge

Description: The usual conditions for achromaticity of a dispersive system are shown to be inadequate when space-charge effects are included. Using a matrix formulation describing linear space-charge forces, we give generalized criteria necessary for a system to be achromatic. Additionally, these conditions are necessary for conservation of transverse emittances. An example of such a system is given.
Date: March 16, 1987
Creator: Jason, A.J.; Svaton, E.M.; Blind, B. & Heighway, E.A.
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Partner: UNT Libraries Government Documents Department
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The edge plasma and divertor in TIBER

Description: An open divertor configuration has been adopted for TIBER. Most recent designs, including DIII-D, NET and CIT use open configurations and rely on a dense edge plasma to shield the plasma from the gas produced at the neutralizer plate. Experiments on ASDEX, PDX, D-III, and recently on DIII-D have shown that a dense edge plasma can be produced by re-ionizing most of the gas produced at the plate. This high recycling mode allows a large flux of particles to carry the heat to the plate, so that the… more
Date: October 16, 1987
Creator: Barr, W.L.
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Partner: UNT Libraries Government Documents Department
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Electromagnetic experiment to map in situ water in heated welded tuff: Preliminary results

Description: An experiment was conducted in Tunnel Complex G at the Nevada Test Site to evaluate geotomography as a possible candidate for in situ monitoring of hydrology in the near field of a heater placed in densely welded tuff. Alterant tomographs of 200 MHz electromagnetic permittivity were made for a vertical and a horizontal plane. After the 1 kilowatt heater was turned on, the tomographs indicated a rapid and strong drying adjacent to the heater. Moisture loss was not symmetric about the heater, but… more
Date: March 16, 1987
Creator: Ramirez, A.L. & Daily, W.D.
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Partner: UNT Libraries Government Documents Department
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H/sup -/ ion source with high duty factor

Description: The small-angle source (SAS) and 4X source are Penning surface-plasma sources (SPS) that produce high-brightness H/sup -/ ion beams for accelerator applications. However, electrode cooling considerations have limited the duty factor for pulsed operation to 1 to 3% and the maximum cw H/sup -/ beam to 2 to 4 mA. The addition of some active cooling to the 4X source has allowed pulsed operation at 6% duty factor for arc parameters sufficient to produce approx. 100 mA of H/sup -/ beam. More vigorous… more
Date: March 16, 1987
Creator: Smith, H. V. Jr.; Schnurr, N. M.; Whitaker, D. H. & Kalash, K. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ICF special studies: Final report

Description: This paper summarizes the work completed by W.J. Schafer Associates for Lawrence Livermore National Laboratory in the area of Inertial Confinement Fusion. The SAFIRE (Systems Analysis Code for ICF Reactor Economics) code is one of the major tasks discussed. (LSP)
Date: September 16, 1987
Creator: Meier, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Improved mesh generator for the POISSON Group Codes

Description: This paper describes the improved mesh generator of the POISSON Group Codes. These improvements enable one to have full control over the way the mesh is generated and in particular the way the mesh density is distributed throughout this model. A higher mesh density in certain regions coupled with a successively lower mesh density in others keeps the accuracy of the field computation high and the requirements on the computer time and computer memory low. The mesh is generated with the help of co… more
Date: March 16, 1987
Creator: Gupta, R.C.
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Partner: UNT Libraries Government Documents Department
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Inferences drawn from shock-enhanced turbulent mixing analyses

Description: This discussion concerns analyses of physical shock-tube and shock-boundary layer interaction experiments, supplemented by computations. The basic issue is that of evaluating the influence of reflected shock waves on enhancing the balance of turbulent kinetic energy and resultant turbulent materials mixing during implosion and shock reflection intervals. Increases in random velocity amplitudes of a factor of 5 or greater implying turbulent kinetic energy increases of a factor of 12 or more have… more
Date: October 16, 1987
Creator: Buckingham, A.C.
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Partner: UNT Libraries Government Documents Department
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Initial electron distributions for free-electron lasers generated by injector and accelerator simulations

Description: Early free-electron laser (FEL) development was guided by simple performance criteria based on the number of undulator periods, electron beam quality, and current. The beam quality (emittance and energy spread) was used to characterize the initial distribution of axial electron velocities along the undulator axis. While the emittance and energy spread determine the overall width of the distribution, its detailed shape is also important. As new accelerators are designed specifically for FEL appl… more
Date: September 16, 1987
Creator: Boyd, J. K.; Colson, W. B. & Scharlemann, E. T.
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Partner: UNT Libraries Government Documents Department
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The -mdoc macro package: A software tool to support computer documentation standards

Description: At Los Alamos National Laboratory a small staff of writers and word processors in the Computer Documentation Group is responsible for producing computer documentation for the over 8000 users of the Laboratory's computer network. The -mdoc macro package was developed as a software tool to support that effort. The -mdoc macro package is used with the NROFF/TROFF document preparation system on the UNIX operating system. The -mdoc macro package incorporates the standards for computer documentation … more
Date: September 16, 1987
Creator: Sanders, C. E.
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Partner: UNT Libraries Government Documents Department
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Mechanical design and fabrication of a 425-MHz H/sup -/ buncher

Description: A beam buncher has been designed, fabricated, and installed on the accelerator test stand (ATS) to match the 2-MeV output beam of a 425-MHz H/sup -/ radio-frequency quadrupole (RFQ) into a 425-MHz drift-tube linac (DTL). The buncher configuration provides integral-matching permanent-magnet quadrupoles (PMQ) at the exit of the RFQ and one ..beta..lambda across the buncher accelerating gap; a third PMQ is the first DTL half-cell magnet. Located between the second and third PMQs is a 50-..cap omeg… more
Date: March 16, 1987
Creator: Wilson, N.G. & Precechtel, D.
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Partner: UNT Libraries Government Documents Department
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Microcanonical simulation of nuclear multifragmentation

Description: We discuss the formal basis for the theoretical treatment of nuclear multifragmentation within a microcanonical framework. The important role played by highly excited nuclear states and the interfragment forces is illustrated. The requirement of detailed balance is especially discussed and illustrated for the fission-fusion Metropolis moves in configuration space. 13 refs., 2 figs.
Date: April 16, 1987
Creator: Randrup, J. & Koonin, S.E.
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Partner: UNT Libraries Government Documents Department
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Microwave Superheaters for Fusion

Description: The microwave superheater uses the synchrotron radiation from a thermonuclear plasma to heat gas seeded with an alkali metal to temperatures far above the temperature of material walls. It can improve the efficiency of the Compact Fusion Advanced Rankine (CFAR) cycle described elsewhere in these proceedings. For a proof-of-principle experiment using helium, calculations show that a gas superheat ..delta..T of 2000/sup 0/K is possible when the wall temperature is maintained at 1000/sup 0/K. The … more
Date: October 16, 1987
Creator: Campbell, R. B.; Hoffman, M. A. & Logan, B. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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