188 Matching Results

Search Results

Results: 1 - 24 next
open access

Radiative corrections in SU/sub 2/ x U/sub 1/ LEP/SLC

Description: We show the sensitivity of various experimental measurements to one-loop radiative corrections in SU/sub 2/ x U/sub 1/. Models considered are the standard GSW model as well as extensions of it which include extra quarks and leptons, SUSY and certain technicolor models. The observation of longitudinal polarization is a great help in seeing these effects in asymmetries in e/sup +/e/sup -/ ..-->.. ..mu../sup +/..mu../sup -/, tau/sup +/tau/sup -/ on Z/sup 0/ resonance. 25 refs., 22 figs., 10 tabs.
Date: June 1, 1985
Creator: Lynn, B. W.; Peskin, M. E. & Stuart, R. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electrical Conductivity Measurements in Shock Compressed Liquid Nitrogen

Description: The electrical conductivity of shock compressed liquid nitrogen was measured in the pressure range 20 to 50 GPa using a two-stage light-gas gun. The conductivities covered a range 4 x 10/sup -2/ to 1 x 10/sup 2/ ohm/sup -1/ cm/sup -1/. The data are discussed in terms of a liquid semiconductor model below the onset of the dissociative phase transition at 30 GPa. 15 refs., 1 fig.
Date: June 1, 1985
Creator: Hamilton, D. C.; Mitchell, A. C. & Nellis, W. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of x-ray computed tomography, through-transmission ultrasound, and low-kV x-ray imaging for characterizing green-state ceramics

Description: Green-state MgAl/sub 2/O/sub 4/ compact disk specimens have been studied by x-ray computed tomography (CT), through-transmission pulsed ultrasound, and low-kV x-ray imaging to compare the abilities of these nondestructive evaluation (NDE) methods to detect flaws and density variations. X-ray computed tomographic images were obtained from a 125-kV (peak) imaging system with a 512 x 512 matrix and a pixel size of 100 ..mu..m. A 3- to 10- MHz focused-beam ultrasonic transducer was used, together w… more
Date: June 1, 1985
Creator: Roberts, R. A.; Ellingson, W. A. & Vannier, M. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Geothermal Energy Resource Investigations in the Eastern Copper River Basin, Alaska

Description: This report consists of a review of the geological, geochemical and geophysical data available for the Eastern Copper River basin with emphasis on the mud volcanoes, and the results of geophysical and geochemical studies carried out in the summers of 1982 and 1984. The purpose was to determine if there are geothermal energy resources in the Copper River Basin. The Eastern Copper River basin is situated on the flanks of a major volcano, Mt. Drum, which was active as late as 200,000 years ago and… more
Date: June 1, 1985
Creator: Wescott, E. M. & Turner, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fermilab advanced computer program multi-microprocessor project

Description: Fermilab's Advanced Computer Program is constructing a powerful 128 node multi-microprocessor system for data analysis in high-energy physics. The system will use commercial 32-bit microprocessors programmed in Fortran-77. Extensive software supports easy migration of user applications from a uniprocessor environment to the multiprocessor and provides sophisticated program development, debugging, and error handling and recovery tools. This system is designed to be readily copied, providing comp… more
Date: June 1, 1985
Creator: Nash, T.; Areti, H.; Biel, J.; Case, G.; Cook, A.; Fischler, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Control and initial operation of the Fermilab BO low. beta. insertion

Description: The operation of the Fermilab BO low ..beta.. insertion involves the coordinated control of the 4 strings of quadrupoles of the insertion itself along with several magnetic correction elements (20 dipoles for the closed orbit, 2 quad circuits for betatron tunes, 1 skew quad circuit for coupling, and 2 sextupole circuits for chromaticity). When the beam is stored at high energy, these elements must correct the errors induced by the strong superconducting quadrupoles of the insertion as the optic… more
Date: June 1, 1985
Creator: Finley, D. A.; Johnson, R. P. & Willeke, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Proposals for synchrotron light sources

Description: Ever since it was first applied in the 1960's synchrotron radiation from an accelerating electron beam has been gaining popularity as a powerful tool for research and development in a wide variety of fields of science and technology. By now there are some 20 facilities operating either parasitically or dedicatedly for synchrotron radiation research in different parts of the world. In addition there are another 20 facilities either in construction or in various stages of proposal and design. The… more
Date: June 1, 1985
Creator: Teng, L.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Phonon effect on the temperature dependence of spin susceptibility and magnetization in metals

Description: In many transition metals the paramagnetic spin susceptibility X increases with increasing temperature much beyond ordinary theories could account for. We demonstrate how the effect of the electron-phonon interactions enable us to understand such temperature dependence of X.
Date: June 1, 1985
Creator: Kim, D. J.; Tanaka, C. & Ukon, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Confinement at large-N. [N = number of colors]

Description: Recent numerical results indicate that QCD in the limit of an infinite number (N) of colors also has confinement and moreover that it looks rather similar to normal QCD with N = 3 colors. This imposes severe restrictions on what the mechanism of confinement can be.
Date: June 1, 1985
Creator: Klinkhamer, F.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ultrasonic longitudinal wave velocity in carbon-carbon Pitch and Pitch/M2 shape stable nosetip material from 70/sup 0/F to 5400/sup 0/F

Description: A pulse echo method was used in two notched rods of carbon-carbon Pitch material and one rod of Pitch/M2 shape stable nosetip material to measure the temperature dependence of the longitudinal wave velocity from room temperature to 5400/sup 0/F. The velocity was constant to within 2% of the room temperature value for the Pitch parent material throughout the temperature range. For the Pitch/M2 material, the velocity increased to a maximum of 10% at 4000/sup 0/F and then decreased rapidly. Room t… more
Date: June 1, 1985
Creator: Gieske, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pulsed power supplies for the Fermilab 1 TeV switchyard

Description: An upgraded system of pulseed switching magnets has been implemented in the Fermilab Switchyard to accommodate proton energies up to 1 TeV. These devices are required for switching the ''slow'' and ''fast'' extracted beams into their respective beam lines. ''Slow'' beam passes undeflected through the magnet in the off condition. During a puls ''slow'' is disabled and ''fast'', which is of approx.1 ms duration, is deflected. The requirement then is for a ''flat-top'' current pulse of minimum ris… more
Date: June 1, 1985
Creator: Bartelson, L. & Walton, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Status of the DOE Battery and Electrochemical Technology Program V

Description: The program consists of two activities, Technology Base Research (TBR) managed by the Lawrence Berkeley Laboratory (LBL) and Exploratory Technology Development and Testing (EDT) managed by the Sandia National Laboratories (SNL). The status of the Battery Energy Storage Test (BEST) Facility is presented, including the status of the batteries to be tested. ECS program contributions to the advancement of the lead-acid battery and specific examples of technology transfer from this program are given… more
Date: June 1, 1985
Creator: Roberts, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Model equations for high current transport

Description: The use of distribution functions to model transverse beam dynamics is discussed. Emphasis is placed on envelope equations, moments, the Vlasov equation, and the Kapchinski-Vladimirskij distribution. 10 refs.
Date: June 1, 1985
Creator: Lee, Edward P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of the analyzing power for pion proton elastic scattering between 471 and 687 MeV/c

Description: The analyzing power, A/sub N/, has been measured for ..pi../sup + -/p..--> pi../sup + -/p at 471, 547, 625, and 687 MeV/c in an angular range corresponding to -0.9 less than or equal to cos theta/sub cm/ less than or equal to 0.8. A polarized proton target with polarization axis normal to the scattering plane was used. The scattered pion and recoil proton were detected in coincidence, using a magnetic spectrometer and a wire chamber/scintillator array, except in cases where one of the particles… more
Date: June 1, 1985
Creator: Mokhtari-Amirmajdi, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mossbauer effect and neutron diffraction study of the anomalous lattice behavior of U/sub 6/Fe

Description: Neutron diffraction and /sup 57/Fe Moessbauer effect measurements have been made on the exchange-enhanced superconductor U/sub 6/Fe. The neutron diffraction results indicate a pronounced anisotropy in the thermal expansion of the unit cell and an anomalous temperature dependence for the c-axis component of the total Debye-Waller factor of Fe below 100K. The Moessbauer effect measurements show non-Debye behavior in the mean-squared displacement of Fe, with phonon hardening occurring below 100K. … more
Date: June 1, 1985
Creator: Vaishnava, P. P.; Dwight, A. E.; Kimball, C. W.; Jorgensen, J. D. & Fradin, F. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Compound nucleus studies withy reverse kinematics

Description: Reverse kinematics reactions are used to demonstrate the compound nucleus origin of intermediate mass particles at low energies and the extension of the same mechanism at higher energies. No evidence has appeared in our energy range for liquid-vapor equilibrium or cold fragmentation mechanisms. 11 refs., 12 figs.
Date: June 1, 1985
Creator: Moretto, Luciano G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Underground Energy Storage Program. 1984 annual summary

Description: Underground Energy Storage (UES) Program activities during the period from April 1984 through March 1985 are briefly described. Primary activities in seasonal thermal energy storage (STES) involved field testing of high-temperature (>100/sup 0/C (212/sup 0/F)) aquifer thermal energy storage (ATES) at St. Paul, laboratory studies of geochemical issues associated with high-temperatures ATES, monitoring of chill ATES facilities in Tuscaloosa, and STES linked with solar energy collection. The scope… more
Date: June 1, 1985
Creator: Kannberg, L.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tevatron global radius and 0s system

Description: It has been found to be practical to extract a turn-average measurement of bunch beam phase relative to cavity gap voltage. This 0s signal shows the bunch position on the rf wave throughout injection, acceleration and extraction, including coherent synchrotron oscillations when present. In turn, the time derivative of 0s is a direct measure of global radial position error. We use the 0s signal, driving a phase shifter in the rf low-level system, to damp coherent synchrotron oscillations. Design… more
Date: June 1, 1985
Creator: Bristol, S.; Kerns, C.; Kerns, Q. & Miller, H.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spin-flip (p,n) reactions on /sup 26/Mg, /sup 54/Fe, and /sup 56/Fe at selected proton bombarding energies in the range of 17 to 25 MeV

Description: New data are presented for the /sup 26/Mg(p,n)/sup 26/Al reaction at E/sub p/ = 19.12 and 24.97 MeV, for the /sup 54/Fe(p,n)/sup 54/Co reaction at E/sub p/ = 17.20, 18.60, and 24.60 MeV, and for the /sup 56/Fe(p,n)/sup 56/Co reaction at E/sub p/ = 19.12 and 24.59 MeV. Data were taken with the LLNL Cyclograaff at 16 angles from 3.5/sup 0/ to 159.0/sup 0/. A large detector at 23.8/sup 0/ with a long neutron flight path collected high resolution spectra. This large detector also collected separate… more
Date: June 1, 1985
Creator: Aron, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Confinement studies in TFTR

Description: The paper describes the present (end of February 1985) status of the plasma confinement studies in the TFTR tokamak with emphasis on those with neutral beam injection (NBI). Recent improvements in the device capabilities have substantially extended operating parameters: B/sub T/ increased to 4.0 T, I/sub p/ to 2.0 MA, injection power (P/sub b/) to 5 MW with H/sup 0/ or D/sup 0/ beams anti n/sub e/ to 5 x 10/sup 19/ m/sup -3/, and Z/sub eff/ reduced to 1.4. With ohmic heating (OH) alone, the pre… more
Date: June 1, 1985
Creator: Murakami, M.; Arunasalam, V.; Bell, J. D.; Bell, M. G.; Bitter, M.; Blanchard, W. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Isolated data acquisition system for high voltage applications

Description: This report describes the design and operation of a microcomputer controlled system for acquisition of both analog and binary data within the high voltage stages of a linac modulator. The system is comprised of a microprocessor Controller which communicates with the remote data Acquisition circuits via an optical bus. The bus, which uses a 1 MHz Manchester II format, is configured as a loop, starting at the Controller, daisy-chaining the remote cards and terminating back at the Controller. Upon… more
Date: June 1, 1985
Creator: Waitz, A. & Donaldson, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improvement of the high voltage properties of the Fermilab electrostatic septa

Description: In the Fermilab Tevatron Switchyard proton beam splits ae initiated by a wire array electrostatic septum. At 1 TeV energy, and with fields limited to 50 kV/cm, an electrostatic septum more than 20 meters in length is required to produce the required angular separation between the beams for the Proton and Neutrino/Meson lines. New techniques have been investigated that will allow reliable operation at fields above 75 kV/cm with resultant beam line economy. Changes in construction and conditionin… more
Date: June 1, 1985
Creator: Trbojevic, D.; Crawford, C.; Childress, S. & Tinsley, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Heavy ion fusion half year report, October 1, 1984-March 30, 1985

Description: Summaries of research are given for each of the following experiments: (1) MBE-4: a four-beam induction linac experiment, (2) performance of the MBE-4 injector, (3) design procedure for acceleration and bunching in an induction linac, (4) longitudinal dynamics of MBE-4, (5) transverse beam dynamics, (6) envelope functions of high-current beam, (7) electrostatic energy analyzer, (8) longitudinal beam control, (9) a capacitive beam-charge monitor for SBTE, (10) materials R and D, (11) simulations… more
Date: June 1, 1985
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low level rf system for the Fermilab Tevatron

Description: This paper discusses the design philosophy, hardware, and operation of the Fermilab Tevatron low level rf system. Plans to extend the system for colliding beams physics are also presented.
Date: June 1, 1985
Creator: Meisner, K.; Edwards, H.; Fitzgerald, J. & Kerns, Q.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen