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A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels (open access)

A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels

A compact cold-transfer apparatus for engaging and retrieving samples at liquid helium temperatures (1.5--4K), maintaining the samples at such temperatures for periods of hours, and subsequently inserting them in diverse apparatuses followed by disengagement, is described. The properties of several thermal radiation-insulating shrouds, necessary for very low sample temperatures, are presented. The immediate intended application is transportable target-shells containing highly spin-polarized deuterons in solid HD or D{sub 2} for inertially confined fusion (ICF) experiments. The system is also valuable for unpolarized high-density fusion fuels, as well as for other applications which are discussed. 9 refs., 6 figs.
Date: January 1, 1990
Creator: Alexander, N.; Barden, J.; Fan, Q. & Honig, A.
Object Type: Report
System: The UNT Digital Library
3-D Depth Migration via McClellan Transformations (open access)

3-D Depth Migration via McClellan Transformations

Three-dimensional seismic wavefields may be extrapolated in depth, one frequency at a time, by two-dimensional convolution with a circularly symmetric, frequency- and velocity-dependent filter. This depth extrapolation, performed for each frequency independently, lies at the heart of 3-D finite-difference depth migration. The computational efficiency of 3-D depth migration depends directly on the efficiency of this depth extrapolation. McClellan transformations provide an efficient method for both designing and implementing two-dimensional digital filters that have a particular form of symmetry, such as the circularly symmetric depth extrapolation filters used in 3-D depth migration. Given the coefficients of one-dimensional, frequency- and velocity-dependent filters used to accomplish 2-D depth migration, McClellan transformations lead to a simple and efficient algorithm for 3-D depth migration. 21 refs., 12 figs.
Date: 1990~
Creator: Hale, D.
Object Type: Report
System: The UNT Digital Library
A 4. pi. tracking TPC magnetic spectrometer for RHIC (open access)

A 4. pi. tracking TPC magnetic spectrometer for RHIC

The primary physics objective of the 4{pi} TPC magnetic spectrometer proposal is to search for the Quark-Gluon Plasma. In previous workshops we have discussed what the possible hadronic signatures of such a state of matter would be. Succinctly, the QGP is a direct prediction of non-perturbative QCD. Therefore the question of the existence of this new state of matter bears directly on the validity of non-perturbative QCD. However, since non-perturbative QCD has never been established, it is apparent that what may await us is a host of new phenomena that will go beyond the standard model.
Date: January 1, 1990
Creator: Danby, G.; Eiseman, S. E.; Etkin, A.; Foley, K. J.; Hackenburg, R. W.; Longacre, R. S. et al.
Object Type: Article
System: The UNT Digital Library
50 kA, 50 kV DC international and switching systems for the Los Alamos ZTH experiment (open access)

50 kA, 50 kV DC international and switching systems for the Los Alamos ZTH experiment

Los Alamos National Laboratory has completed the engineering design and development for the high power electrical switching networks for the ZTH experiment. ZTH is Reversed Field Pinch (RFP) plasma experiment with a 4 MA plasma current capability. Power to the ohmic heating (OH), equilibrium field (EF), and toroidal field (TF) coils will be provided from a 1.43 GVA turbo-alternator, which has over 600 MJ of extractable energy. The DC interrupting switch will handle 2.4 GVA, 150 MJ during initial machine operations. An additional 150 to 200 MJ are required for flat-topping the plasma current. A new ultra-high power switch, designed and tested at Los Alamos, will be used to reconfigure the power supply connections so that the supplies can be switched from parallel to series operation. In this manner, the same supplies can be used to charge and then flat-top the OH coils. The inexpensive cost of these switches results in significant economy of power supplies and systems. Detailed engineering information will be presented for the family of 25 kA and 50 kA, 50kV fast isolation and transfer switches, including testing of special water-cooled units capable of 50,000 amperes continuous duty. Similarly, detailed engineering data will be provided for the …
Date: January 1, 1990
Creator: Reass, W. A.; Cordova, R. J. & Garcia, J. G.
Object Type: Article
System: The UNT Digital Library

1990 Census County Block Map (Recreated): Anderson County, Block 1

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 2

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 3

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 4

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 5

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 6

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 7

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 8

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 9

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 10

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 11

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 12

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 13

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 14

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 15

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 16

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 17

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 18

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 19

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History

1990 Census County Block Map (Recreated): Anderson County, Block 20

Parent map for Anderson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,500.
Date: 1990
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History