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Radionuclides in plankton from the South Pacific Basin

Description: We have initiated an investigation of the utility of marine plankton as bioconcentrating samplers of low-level marine radioactivity in the southern hemisphere. A literature review has shown that both freshwater and marine plankton have trace element and radionuclide concentration factors (relative to water) of up to 10/sup 4/. We participated in Operations Deepfreeze 1981 and 1982, collecting a total of 48 plankton samples from the USCGC Glacier on its Antarctic cruises. Battelle Pacific Northw… more
Date: March 23, 1984
Creator: Marsh, K.V. & Buddemeier, R.W.
Partner: UNT Libraries Government Documents Department
open access

Low energy neutral source for fueling the central cell core plasma of TMX-U

Description: The performance of a low energy neutral source formed by negatively biased plates inserted in the edge plasma of the central cell of the Tandem Mirror Experiment-Upgrade (TMX-U) is described. This technique promises to be capable of fueling the high density thermal barrier plasmas. We have found that annular ring electrodes mounted on the sides of the central cell gas box and inclined 45/sup 0/ to the plasma axis can produce about 80 A of inward-directed D/sup 0/ with an average energy E/sub 0/… more
Date: April 23, 1984
Creator: Turner, W.C.
Partner: UNT Libraries Government Documents Department
open access

Coating of the SLAC klystron windows

Description: Secondary emission is not likely to be suppressed in thin films. Accumulated charges leak away with two time constants. The fast time constant should be short compared to the pulse duration, and the slow time constant should be short compared to the time between pulses. The Joule heating may be prohibitive in reaching adequate charge removal. The joule heating may be reduced by films which conduct little in the direction of the electric field and much better in the perpendicular direction.
Date: May 23, 1984
Creator: Krienen, F.
Partner: UNT Libraries Government Documents Department
open access

Comparison of the total neutral energy spectra of. cap alpha cap alpha. , dd and pp interactions at the ISR

Description: The total neutral energy spectra, E/sub TOT//sup 0/ = ..sigma../sub i/ epsilon/sub i//sup 0/, have been measured in the central region of ..cap alpha cap alpha.., dd and pp interactions at ..sqrt..s/sub NN/ = 31 GeV with an electromagnetic calorimeter covering 2..pi.. in azimuth. The data were collected in the light-ion run at the CERN ISR during August 1983. The cross section ratio of the ..cap alpha cap alpha.. to the pp interactions increases rapidly with E/TOT//sup 0/ from 7 to 10/sup 5/ in… more
Date: May 23, 1984
Creator: Tanaka, M.
Partner: UNT Libraries Government Documents Department
open access

Study in optical systems for laser isotope separation. Final report

Description: An overview is given of the following tasks related to laser isotope separation: Triton beam delivery optics, dye chain relay optics, CVL beam delivery, and optical delay line.
Date: April 23, 1984
Creator: Hayford, M.J.; Broome, B.G. & Manhart, P.K.
Partner: UNT Libraries Government Documents Department
open access

Internal magnetic field measurements in a translating field-reversed configuration

Description: Magnetic field probes have been employed to study the internal field structure of Field-Reversed Configurations (FRCs) translating past the probes in the FRX-C/T device. Internal closed flux surfaces can be studied in this manner with minimal perturbation because of the rapid transit of the plasma (translational velocity v/sub z/ approx. 10 cm/..mu..s). Data have been taken using a low-field (5 kG), 5-mtorr-D/sub 2/ gas-puff mode of operation in the FRC source coil which yields an initial plasm… more
Date: February 23, 1984
Creator: Armstrong, W. T.; Chrien, R. E.; McKenna, K. F.; Rej, D. J.; Sherwood, E. G.; Siemon, R. E. et al.
Partner: UNT Libraries Government Documents Department
open access

Observations on LEP with a view to SSC

Description: From 24-29 October 1984 a visit was made to the LEP project at CERN with a view to extracting from the LEP planning and experience what might be useful in planning an SSC. With a circumference of 26.7 km, in a reasonably densely-populated area outside the boundaries of the CERN site, LEP already faces most of the problems of environment, public relations, maintenance and operation that will be faced by an SSC project. Information is presented under the headings of: (1) radiation protection; (2)… more
Date: November 23, 1984
Creator: Toohig, T.E.
Partner: UNT Libraries Government Documents Department
open access

Rapid technique for counting cracks in granitic rocks

Description: Using a scanning electron microscope and an image analyzer, we have developed a technique for counting and measuring cracks in rocks which is more efficient than traditional techniques in which an operator performs all image analysis functions. The key aspect of the technique is that black-on-white tracings of fresh cracks, which can be made rather quickly by an operator, are fed to an image analyzer which then digitizes and tabulates data. The most time-consuming step in the process has now be… more
Date: January 23, 1984
Creator: Durham, W.B.; Beiriger, J.M. & Weed, H.C.
Partner: UNT Libraries Government Documents Department
open access

Irradiation of copper alloys in FFTF

Description: Nine copper-base alloys in thirteen material conditions have been inserted into the MOTA-18 experiment for irradiation in FFTF at approx.450/sup 0/C. The alloy Ni-1.9Be is also included in this experiment, which includes both TEM disks and miniature tensile specimens.
Date: May 23, 1984
Creator: Brager, H. R. & Garner, F. A.
Partner: UNT Libraries Government Documents Department
open access

Aspartame: An Artificial Sweetener

Description: Since 1973 when the Food and Drug Administration first approved the artificial sweetener, aspartame, for use in food products, some researchers have raised questions about possible health effects associated with its consumption. This paper provides an overview of the regulatory history and possible health problems associated with the use of aspartame.
Date: March 23, 1984
Creator: Porter, Donna V.
Partner: UNT Libraries Government Documents Department
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