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0. 9 a Gev /sup 238/U on /sup 238/U collisions in the LBL streamer chamber. Appendix A
Charged particle exclusive data for high multiplicity U on U events are reported. Analyses are based on comparison with Cugnon's intranuclear cascade model, and the explosion-evaporation simulation of Fai and Randrup. The azimuthal structure of the observed events shows evidence of collective flow. The widely used flow angle methodology proves to be relatively insensitive to collective effects under the conditions of the present experiment. An isotropic pattern of ejectile emission is not reached at maximum multiplicity. 18 refs., 4 figs.
Date:
January 1, 1984
Creator:
Fung, S.Y.; Beavis, D.; Gorn, W.; Keane, D.; Liu, Y.M.; Poe, R.T. et al.
Object Type:
Article
System:
The UNT Digital Library
3-D treatment of convective flow in the earth's mantle
A three-dimensional finite-element method is used to investigate thermal convection in the earth's mantle. The equations of motion are solved implicitly by means of a fast multigrid technique. The computational mesh for the spherical problem is derived from the regular icosahedron. The calculation described use a mesh with 43,554 nodes and 81,920 elements and were run on a Cray X. The earth's mantle is modeled as a thick spherical shell with isothermal, free-slip boundaries. The infinite Prandtl number problem is formulated in terms of pressure, density, absolute temperature, and velocity and assumes an isotropic Newtonian rheology. Solutions are obtained for Rayleigh numbers up to approximately 10/sup 6/ for a variety of modes of heating. Cases initialized with a temperature distribution with warmer temperatures beneath speading ridges and cooler temperatures beneath present subduction zones yield whole-mantle convection solutions with surface velocities that correlate well with currently observed plate velocities. 8 references, 6 figures.
Date:
May 1, 1984
Creator:
Baumgardner, J.R.
Object Type:
Article
System:
The UNT Digital Library
5 K neutron irradiation and thermal cycling of NbTi superconductors
Simulation experiments of magnet operating conditions in a fusion reactor are reported. After approximately half of the lifetime dose the results on a variety of NbTi superconductors show moderate changes of the critical current density j/sub c/ (approx. 10%), the percentage change of j/sub c/ is always larger at high fields (8 T) than at 5 T. After a rapid initial change the resistivity ratios of the Cu-stabilizer are found to decrease only slowly with increasing neutron fluence.
Date:
May 1, 1984
Creator:
Hahn, P.; Hoch, H.; Weber, H. W.; Birtcher, R. C. & Brown, B. S.
Object Type:
Article
System:
The UNT Digital Library
6. 5 Tesla SSC lattice example
This note presents an example SSC collider lattice for 20 TeV proton beams using 6.5 Tesla double bore magnets, six collision points, and anti-symmetric insertions.
Date:
January 1, 1984
Creator:
Garren, A.A.
Object Type:
Article
System:
The UNT Digital Library
S-11 and S-20 photocathode research activity. Rev. 1
The S-1 semi-transparent photocathode is the only one that can be used to study the 1.06 ..mu..m neodynium laser pulses of less than 10 ps duration. We first reviewed the recent results obtained at the Paris Observatory (research sponsored by the CEA), and then we tried to determine the role of the main constituents and their contributions in photoemission.
Date:
August 27, 1984
Creator:
Gex, F.; Huen, T. & Kalibjian, R.
Object Type:
Report
System:
The UNT Digital Library
16.12.1981 Kopalnia "Wujek" 50 zł 1984 R.K.W. Region Slasko-Dabrowski
Postage stamp printed in black on a white ground depicts two crossed hammers with a piece of an olive branch above. Below the tools is the date of the Wujek Coal Miners' Strike.
Date:
1984
Creator:
unknown
Object Type:
Artwork
System:
The UNT Digital Library
O(18) revived
We present an O(18) theory which is pertubatively unifiable and which accounts for the absence of right-handed families in the low-energy world. The model gives rise to dramatic predictions for proton decay and for the Z/sup 0/ width.
Date:
August 1, 1984
Creator:
Bagger, J.; Dimopoulos, S. & Masso, E.
Object Type:
Article
System:
The UNT Digital Library
25. mu. A pulsed polarized H/sup -/ ion source
A Haeberli-type pulsed polarized negative hydrogen source has been brought into operation at the BNL Alternating Gradient Synchrotron. It operates reliably at beam currents sometimes as high as 25 ..mu..A and 20 keV in beam pulses of 500 ..mu..sec with approximately 75% polarization. These beam intensities are about an order of magnitude higher than the original Haeberli source built at the University of Wisconsin. This improvement is caused by the higher densities of both the atomic hydrogen beam and the cesium beam, which are the basic ingredients in the charge exchange reaction. About half the beam (10 to 15 ..mu..A) is accelerated in the 200 MeV linac and injected into the AGS. 3 references, 3 figures.
Date:
January 1, 1984
Creator:
Alessi, J.; Kponou, A. & Sluyters, T.
Object Type:
Article
System:
The UNT Digital Library
40 mm bore Nb-Ti model dipole magnet
Preliminary R and D has been started on magnets for a next-generation high-energy-physics accelerator, the 20 TeV Superconducting Supercollider (SSC). One design now being developed at LBL is described in this paper. The design is based on two layers of flattened Nb-Ti cable, a 40 mm ID winding with flared ends, and an operating field of 6.5 T. Experimental results are presented on several one-meter-long models tested at both He I and He II temperature. Measurement of field, residual magnetization, quench propagation velocity, and winding prestress are presented. (A 2-in-1 magnet based on this coil design is being jointly developed by LBL and Brookhaven National Laboratory, and 15 ft. long models are being constructed at BNL).
Date:
September 10, 1984
Creator:
Taylor, C.; Gilbert, W.; Hassenzahl, W.; Meuser, R.; Peters, C.; Rechen, J. et al.
Object Type:
Article
System:
The UNT Digital Library
60 GHz, 200 kW CW gyrotron with high output mode purity
For the first time, a Varian 60 GHz gyrotron, designed specifically to generate microwaves in a single output mode, has been operated at power levels up to 200 kW CW. High output mode purity is required for the efficient utilization of gyrotrons as high power microwave sources for electron cyclotron resonance heating (ECRH) in magnetic fusion plasmas. Using mode-specific directional couplers, measurements of the output mode content indicated that greater than 95% of the microwave output was in the desired TE/sub 02/ mode, with only small percentages in the neighboring TE/sub 01/ and TE/sub 03/ circular electric modes. The pure mode CW design uses a 2.5-inch diameter collector. The collector has a magnetic field arrangement which capably avoids excessive heating by distributing the 640 kW CW beam over a sufficient collector area. With pure mode operation, window temperatures are 10/sup 0/C to 15/sup 0/C higher than with mixed mode operation.
Date:
January 1, 1984
Creator:
Jory, H.; Felch, K.; Bier, R.; Fox, L.; Huey, H.; Ives, L. et al.
Object Type:
Article
System:
The UNT Digital Library
100 MHz fiber optic single transient gamma ray detection system
A fiber optic system has been developed to measure single transient gamma rays. The gamma ray signature is converted to light by the Cerenkov process in a 20 cm length of radiation resistant optical fiber. The signal is transmitted over 1 km of optical fiber and detected by state-of-the-art, 175 MHz analog receivers. The receivers are based on silicon PIN detectors with transimpedance hybrid amplifiers and two stages of power amplification. The dc coupled receivers have less than 2% distortion up to 5 volts with less than 10 mV rms noise and a responsivity of 37,500 V/watt at 800 nm. A calibration system measures relative fiber to fiber transit time delays and ''system'' sensitivity. System bandwidth measurements utilized an electron linear accelerator (Linac) with a 50 ps electron pulse as the Cerenkov light source. The system will be described with supporting calibrationa and characterization data of parts of the system and the whole system.
Date:
January 1, 1984
Creator:
Ogle, J. W.; Smith, R. C.; Ward, M.; Ramsey, R. & Hollabaugh, J.
Object Type:
Article
System:
The UNT Digital Library
I-129 in SRP high-level waste and saltstone
Long-lived isotopes in nuclear waste can have the greatest impact on man and the environment because of the integrated dose over a long time period. Many long-lived radioactive isotopes are present in the waste at Savannah River Plant. Actinide elements make up a significant portion of these isotopes. But when the waste is incorporated into a glass waste form, the actinides are converted to chemically stable oxide species that are released at extremely low and controlled rates, even after the waste form has degraded. Because of their different chemistry, radioactive isotopes of carbon, technetium, and iodine could be released at a significantly higher rate. To establish the potential hazard from these isotopes, their concentration in waste forms for final disposal must be known. The concentrations of C-14 and T{sub c}-99 in SRP waste were previously estimated. Additional analytical data has now been obtained for I-129 in H-Area soluble waste to estimate its concentration in SRP waste. Because of the nature of processes at SRP, most of the I-129 in the waste is in the H-Area waste tanks.
Date:
February 29, 1984
Creator:
Fowler, J. R. & Cook, J. R.
Object Type:
Report
System:
The UNT Digital Library
650 mm long liquid hydrogen target for use in a high intensity electron beam
This paper describes a 650 mm long liquid hydrogen targetr constructed for use in the high intensity electron beam at the Stanford Linear Accelerator Center (SLAC). The main design problem was to construct a target that would permit the heat deposited by the electron beam to be removed rapidly without boiling the hydrogen so as to maintain constant target density for optimum data taking. Design requirements, cosntruction details and operating experience are discussed.
Date:
February 1, 1984
Creator:
Mark, J.W.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Ed. 1 Monday, August 27, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 27, 1984
Creator:
Shanks, Doris
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 15, Ed. 1 Wednesday, January 11, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 11, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 16, Ed. 1 Thursday, January 19, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 19, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 17, Ed. 1 Thursday, January 26, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 26, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 18, Ed. 1 Thursday, February 2, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 2, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 19, Ed. 1 Thursday, February 9, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 9, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 20, Ed. 1 Thursday, February 16, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 16, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 21, Ed. 1 Thursday, February 23, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 23, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 22, Ed. 1 Thursday, March 1, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 1, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 23, Ed. 1 Thursday, March 8, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 8, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 13, No. 24, Ed. 1 Thursday, March 15, 1984
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 15, 1984
Creator:
Spain, Nathan
Object Type:
Newspaper
System:
The Gateway to Oklahoma History