31,252 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "research"  
Results: 1 - 24 next
open access

A 0. 4 mm Interferometer System Using Dielectric Waveguide

Description: A 0.4 mm submillimeter-wave, phase-modulated polarimeter/interferometer is used for simultaneous time-dependent measurement of line-averaged electron density and poloidal field-induced Faraday rotation along chords of the plasma column in ISX-B tokamak. Heterodyna detection and hollow dielectric waveguide are utilized to achieve the high sensitivity required for the multichord equipment.
Date: January 1, 1982
Creator: Hutchinson, D. P.; Ma, C. H.; Staats, P. A. & Vander Sluis, K. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The 0.38 Percent Across-the-Board Cut in FY2000 Appropriations

Description: This report outlines cuts made in the federal budget for FY2000. The 0.38% cut was expected to yield savings of $2.4 billion in budget authority and $1.4 billion in outlays for the fiscal year. Departments with cuts in excess of $100 million included the Departments of Defense, Transportation, Health and Human Services, and Education.
Date: February 25, 2000
Creator: Keith, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

0-D study of the compression of low temperature spheromaks

Description: Compression of low temperature spheromak plasmas has been studied with the aid of a O-D two-fluid computer code. It is found that in a plasma which is radiation dominated, the electron temperature can be increased by up to a factor of seven for a compression of a factor of two, provided the temperature is above some critical value (approx.25eV) and the electron density particle confinement time product n/sub e/tau/sub p/ greater than or equal to 1 x 10/sup 9/s/cm/sup 3/. If the energy balance i… more
Date: September 1, 1985
Creator: Meyerhofer, D. D.; Hulse, R. A. & Zweibel, E. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

1.1-meter bore, 8-Tesla test facility

Description: The design and fabrication of a 1.1-m bore superconducting coil for an 8- T facility at Lawrence Livermore Laboratory are discussed. This facility will provide the backing field required for testing large multifilamentary Nb$sub 3$Sn coils as part of the superconductor development program at Livermore. The magnet measures 1.85 m o.d., is 1.5 m in length, and is solenoid wound in four separate modules. Total cold weight of the assembly is 18,000 Kg. A NbTi superconductor is used throughout with … more
Date: November 19, 1975
Creator: Nelson, R.; Cornish, D.; Zbasnik, J.; Sackett, S. & Taylor, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

1,3,5-trichlorobenzene progress report, July--September 1976

Description: Research progress is reported on the following topics: (1) conversion of 2, 4, 6-trichloroaniline to 2, 4, 6-trichloronitrobenzene; (2) nitration of 1, 2, 4-trichlorobenzene; (3) exploration of the route to 1, 3, 5-trichlorobenzene via aniline; and (4) direct nitration of trichloroaniline. (TFD)
Date: September 1, 1976
Creator: Estes, Z. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

1 - FFTF-LMFBR seal test program, July-September 1974

Description: The objectives of the general seal test program are to: (1) conduct static and dynamic tests to demonstrate or determine the mechanical performance of full-size (cross-section) FFTF fuel transfer machine and reactor vessel head seals intended for use in a sodium vapor - inert gas environment, (2) demonstrate that these FFTF seals or new seal configurations provide acceptable fission product and cover gas retention capabilities at Clinch River Breeder Reactor Plant (CRBRP) operating environmenta… more
Date: January 1, 1974
Creator: Kurzeka, W. & Oliva, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

1. K+ Charge Exchange - Search For K+ Charge Exchange

Description: An experiment was designed utilizing a charge-exchange reaction to study the decay and interactions of the neutral K mesons produced. The experiment produced no events that could be interpreted as either the decay or interaction of neutral K mesons. The nature of the experiment and the possible explanations of this unexpected result are presented in this paper.
Date: July 29, 1959
Creator: Birge, Robert W.; Courant, Hans J.; Lanou, Robert E., Jr. & Whitehead, Marian N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A 1-kW power demonstration from the advanced free electron laser

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The main objective of this project was to engineer and procure an electron beamline compatible with the operation of a 1-kW free-electron laser (FEL). Another major task is the physics design of the electron beam line from the end of the wiggler to the electron beam dump. This task is especially difficult because electron beam is expected to have 20 k… more
Date: August 1997
Creator: Sheffield, R. L.; Conner, C. A. & Fortgang, C. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2-D skin-current toroidal-MHD-equilibrium code

Description: A two-dimensional, toroidal, ideal MHD skin-current equilibrium computer code is described. The code is suitable for interactive implementation on a minicomptuer. Some examples of the use of the code for design and interpretation of toroidal cusp experiments are presented.
Date: September 1, 1982
Creator: Feinberg, B.; Niland, R. A.; Coonrod, J. & Levine, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2-D time evolution of T/sub e/ during sawtooth crash based on fast ECE (electron cyclotron emission) measurements on TFTR

Description: Electron cyclotron emission measurements taken at 20 locations in the horizontal midplane during a sawtooth crash have been analysed based on the assumption of fast rigid rotation of the plasma. Due to this fast rotation (approx.100..mu..sec), which remains fairly constant throughout the sawtooth crash, we have been able to make time-to-space reconstructions of half the poloidal plane using points which are separated in time by not more than 40..mu..sec. The existence of a temperature flattenin… more
Date: December 1, 1988
Creator: Kuo-Petravic, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2-mm microwave interferometer

Description: A 2-mm microwave interferometer has been developed, and phase shift measurements have been made on the Baseball II experiment. The interferometer system employs a 140-GHz receiver for double down conversion of the plasma signal to a 60-MHz, IF frequency. The 140-GHz references signal is also down-converted and compared with the plasma signal to provide the desired phase change of the signal passing through the plasma. A feedback voltage from a 60-MHz discriminator to a voltage-controlled oscill… more
Date: March 1, 1977
Creator: Futch, A. H. & Mortensen, W. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2$sup 0$K vacuum pumping system for Baseball II

Description: A vacuum pumping system that provides a cryo surface for condensing and freezing of H/sub 2/ gas is described. A closed-loop vacuum system was designed and built at Lawrence Livermore Laboratory to pump down the neutralizer LH/sub e/ dewar with a volurae of 350 l and the lambda point dewar with a LH/sub e/ volume of 250 l. Both of these dewars can be pumped down simultaneously or one at a time. 100% of the H/sub e/ gas is recovered free of contaminations. The vacuum pump can handle 340 SCFM of … more
Date: August 20, 1973
Creator: Denhoy, B.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

3-D hybrid PIC code to model the tilt mode in FRCs

Description: The results from QN3D are presented. QN3D is a 3-dimensional hybrid particle-in-cell code designed to run efficiently on the Cray-2 Multiprocessor. The chief application has been to the tilt mode instability in FRCs. QN3D accepts as input, the magnetic field, the ion particle density and the ion temperature on a two-dimensional r-z grid. These quantities are interpolated to the rest of the cartesian grid under the assumption of azimuthal symmetry. The particles are initialized with random numbe… more
Date: June 1, 1987
Creator: Horowitz, E. J. & Shumaker, D. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

3-D Nonlinear Calculations of Resistive Tearing Modes

Description: Recent numerical calculations of the evolution of resistive tearing modes have been central to the understanding of magnetohydrodynamic activity and disruptions in tokamaks. The nonlinear, 3-D, initial-value computer code RSF has provided many of these results. This code assumes cylindrical geometry with a Fourier series representation in the two periodic coordinates and a finite-difference representation in the radial direction. This choice makes RSF considerably more accurate and efficient th… more
Date: March 1, 1981
Creator: Hicks, H. R.; Holmes, J. A.; Lee, D. K.; Carreras, B. & Waddell, B. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

3-D nonlinear evolution of MHD instabilities

Description: The nonlinear evolution of ideal MHD internal instabilities is investigated in straight cylindrical geometry by means of a 3-D initial-value computer code. These instabilities are characterized by pairs of velocity vortex cells rolling off each other and helically twisted down the plasma column. The cells persist until the poloidal velocity saturates at a few tenths of the Alfven velocity. The nonlinear phase is characterized by convection around these essentially fixed vortex cells. For exampl… more
Date: March 1, 1977
Creator: Bateman, G.; Hicks, H. R. & Wooten, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

3-D resistive MHD calculations for tokamak plasmas: beyond the simple reduced set of equations

Description: Numerical studies of the resistive stability of tokamak plasmas in cylindrical geometry have been performed using: (1) the full set of resistive Magnetohydrodynamic (MHD) equations and (2) an extended version of the reduced set of resistive MHD equations including diamagnetic and electron temperature effects. In particular, the nonlinear interaction of tearing modes of many helicities has been investigated. The numerical results confirm many of the features uncovered previously using the simple… more
Date: January 1, 1983
Creator: Carreras, B. A.; Garcia, L.; Hender, T. C.; Hicks, H. R.; Holmes, J. A.; Lynch, V. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

[3 Wild Stallions outside of the second LSRFA pit-stop]

Description: Photograph of three of the Wild Stallions team members at the second LSRFA pit-stop. They are wearing matching red, orange, and yellow jerseys with flames at the bottom and "Wild Stallions" across the chest. They are also wearing red accessories including a feather boa on their helmets, red butterfly masks, and orange zipties on top of their helmets. One has the number 38 on her helmet.
Date: September 24, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[4 Wild Stallions outside of the second LSRFA pit-stop]

Description: Photograph of three of the Wild Stallions team members at the second LSRFA pit-stop. They are wearing matching red, orange, and yellow jerseys with flames at the bottom and "Wild Stallions" across the chest. They are also wearing red accessories including a feather boa, red butterfly masks, and orange zipties on top of their helmets, a Nike tank top, tutus, and socks. One has the number 38 on her helmet.
Date: September 24, 2011
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
open access

7-GeV Advanced Photon Source Beamline Initiative. Conceptual Design Report

Description: The DOE is building a new generation 6-7 GeV Synchrotron Radiation Source known as the Advanced Photon Source (APS) at Argonne National Laboratory. This facility, to be completed in FY 1996, can provide 70 x-ray sources of unprecedented brightness to meet the research needs of virtually all scientific disciplines and numerous technologies. The technological research capability of the APS in the areas of energy, communications and health will enable a new partnership between the DOE and US indus… more
Date: May 1993
Creator: Argonne National Laboratory
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

7-GeV Advanced Photon Source : Conceptual Design Report

Description: During the past decade, synchrotron radiation emitted by circulating electron beams has come into wide use as a powerful, versatile source of x-rays for probing the structure of matter and for studying various physical processes. Several synchrotron radiation facilities with different designs and characteristics are now in regular operation throughout the world, with recent additions in this country being the 0.8-GeV and 2.5-GeV rings of NSLS at Brookhaven National Laboratory. However, none of … more
Date: April 1987
Creator: Argonne National Laboratory
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

7-GeV Advanced Photon Source Instrumentation Initiative. Conceptual Design Report

Description: In this APS Instrumentation Initiative, 2.5-m-long and 5-m-long insertion-device x-ray sources will be built on 9 straight sections of the APS storage ring, and an additional 9 bending-magnet sources will also be put in use. The front ends for these 18 x-ray sources will be built to contain and safeguard access to these bright x-ray beams. In addition, funds will be provided to build state-of-the-art insertion-device beamlines to meet scientific and technological research demands well into the … more
Date: October 1992
Creator: Argonne National Laboratory
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen