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247 Matching Results

Start Over Year 1980 Month January

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(open access)

User needs: is a survey the answer

Some of the ramifications of user needs, user satisfaction, and the survey as a shaper of library policy are discussed. The presentation is in three parts: philosophical thinking on user needs and satisfaction, a modest tutorial on survey methodology, and a brief review of the Sandia National Laboratory Technical Library's use of surveys for information gathering and decision making. (RWR)

Date: January 1, 1980

Creator: Gardner, J.L.

Object Type: Article

System: The UNT Digital Library

(open access)

Electrode design and performance of the ORNL positive ion sources

The neutral beam development group at ORNL has designed, constructed, and shipped four 50-kV, 100-A sources to PPPL to be used for neutral beam heating of the confined plasma on the PDX tokamak. These sources have higher current capability than scaled-down sources, and they are required to run for 0.5 s as opposed to the 0.3-s requirement for PLT and ISX-B sources. Due to an innovative electrode design, these higher power sources met these requirements and achieved a higher transmission efficiency - 76% of the total input power on target vs 60% for the original ISX-B and modified PLT sources or 40% for the original PLT sources. As a consequence, a power of 2 MW of neutrals to the torus target was achieved; this is a record for measured neutral power and exceeds that of any other power source expected to be used on such advanced tokamaks as TFTR and D-III. A theoretical consideration of the relevant Poisson-Vlasov equations for ions extracted from a plasma was used to optimize the ion optics. Using the same electrode design with a tetraode accelerating structure and a new, indirectly heated cathode, repeatable long pulse, high energy conditions of 70 kV, 7 A, 8 …

Date: January 1, 1980

Creator: Whealton, J.H.; Gardner, W.L. & Haselton, H.H.

Object Type: Article

System: The UNT Digital Library

(open access)

Results of the fourth Hanna field test

The second phase (Hanna IVB) of a coal gasification experiment near Hanna, Wyoming, was completed in September 1979. The experiment attempted to link and gasify coal between process wells spaced 34.3 meters apart. Intermediate wells were positioned between the process wells so that the link could be relayed over shorter distances. Reverse combustion linking was attempted over a 22.9-meter and a 11.4-meter distance of the total well spacing. Thermal activity was generally noted in the upper 3 meters of the coal seam during the link. Two attempts to gasify over the 34.3-meter distance resulted in the propagation of the burn front at the coal overburden interface. Post-burn evaluation indicates fractures as major influencing factors of the combustion process. The Hanna IVB field test provided much insight into influence that geologic features have on in situ coal combustion. The influence of these faults, permeable zones, and cleats, on the air flow patterns can drastically change the overall results of a gasification experiment and should be studied further. The overall results of Hanna IVB were discouraging because of the rapid decline in the heating values for the production gas and the amount of coal gasified. With more complete geologic characerization prior to …

Date: January 1, 1980

Creator: Covell, J. R.; Wojdac, L. F.; Barbour, F. A.; Gardner, G. W.; Glass, R. & Hommert, P. J.

Object Type: Article

System: The UNT Digital Library

(open access)

Improvement of sputtered oxide coating adherence and integrity for turbine airfoil applications. Combustion zone durability program. Task III: dense surface sputtered ceramic coatings. Annual technical progress report, October 1, 1978-September 30, 1979

Two aspects of the durability of modified ZrO/sub 2/ ceramic thermal barrier coatings for gas turbine airfoils are being investigated in this program. First, adherence of coatings of these materials has historically been difficult to achieve due to mismatch in thermal expansion coefficients and other properties between ceramic coatings and metallic substrates. Second, if the ceramic coatings are discontinuous, as for many plasma sprayed coatings, then condensate from the combustion environment may permeate the coating and volume changes in this condensate during subsequent service cycles may produce coating spallation. The adherence problem was approached by seeking to sputter deposit ceramic coatings over either sputter-etched, closely spaced, high aspect ratio substrate surface cones or by sputter depositing ceramic coatings over sputtered CoCrAlY coatings containing a very high density of columnar voids (leaders). The objective in both instances was to provide a compliant fibrous metal attachment between metal substrate and ceramic coating to absorb property mismatches. The permeability problem was approached both by coating a segmented (fibrous columnar) ceramic layer with a continuous and impervious metal sealing layer that is not required to provide structural strength or insulation, and by coating the segmented ceramic layer with a continuous layer of the same …

Date: January 1, 1980

Creator: Patten, J. W.; Busch, R.; Moss, R. W.; Bayne, M. A. & Fairbanks, J. W.

Object Type: Report

System: The UNT Digital Library

(open access)

EVOLUTION OF PROJECTILE DOUBLE K VACANCY FRACTIONS WITH TARGET THICKNESS IN ION-ATOM COLLISIONS

The dependence of projectile double K-vacancy (hypersatellite) x-ray yields on target thickness for ions moving in thin solid targets is examined. For 2.3 MeV/amu Cl ions incident on C foils, the double-to-single K vacancy x-ray yield increases by a factor of 3.5 over the range of thicknesses investigated, reaching values as high as 30%. A quantitative explanation of the observed results is obtained using the three-component model of Gardner et al.

Date: January 1, 1980

Creator: Tanis, J.A.; Shafroth, S.M.; Willis, J.E. & Mowat, J.R.

Object Type: Article

System: The UNT Digital Library

(open access)

Status of high energy neutron cross sections

Review is presented of the current status of neutron-induced reactions of interest to the fusion community in the 10- to 50-MeV neutron energy range. Although there has been significant activity in this area since the 1977 BNL Symposium on Neutron Cross Sections from 10 to 40 MeV, this review concludes that there are many areas which require more experimentation to obtain the requested accuracy. Examples of various neutron data obtained since 1977 are presented and compared to determine the extent of agreement. An attempt is made to determine what the prospects are for satisfying the fusion data needs defined by the US DOE based upon progress to date.

Date: January 1, 1980

Creator: Browne, J. C. & Lisowski, P. W.

Object Type: Article

System: The UNT Digital Library

(open access)

Hydrographic Observations Off Savannah and Brunswick, Georgia: March, May and September 1977 and January 1978. Technical Report 80-1

Research progress is reported in studies of the oceanography of the South Atlantic Bight during the spring transition period. Volume 3 contains technical reports of hydrographic observations. (ACR)

Date: January 1, 1980

Creator: Singer, J. J.; Atkinson, L. P.; Chandler, W. S. & Bishop, S. S.

Object Type: Report

System: The UNT Digital Library

(open access)

Development of new techniques of using irradiation in the genetic improvement of warm season grasses, the assessment of their genetic and cytogenetic effects and biomass production from grass. Annual progress report, November 1, 1979 to October 31, 1980

New techniques are described for using irradiation and chemical mutagens in the genetic improvement of several warm season grasses. Genetic and cytogenetic effects of these treatments are also being studied. (ACR)

Date: January 1, 1980

Creator: Burton, G W & Hanna, W W

Object Type: Report

System: The UNT Digital Library

(open access)

Shelf-sea ecosystems

An analysis of the food chain dynamics of the Oregon, Alaskan, and New York shelves is made with respect to differences in physical forcing of these ecosystems. The world's shelves are 10% of the area of the ocean, yield 99% of the world's fish catch, and may be a major sink in the global CO/sub 2/ budget.

Date: January 1, 1980

Creator: Walsh, J J

Object Type: Report

System: The UNT Digital Library

(open access)

Additions and corrections to the bibliography of geologic studies, Columbia Plateau (Columbia River Besalt) and adjacent Areas, in Idaho, 1980

This bibliography is an update to Idaho Bureau of Mines and Geology Open-File Report 78-6, Bibliography of Geological Studies, Columbia Plateau (Columbia River Basalt Group) and adjacent areas in Idaho (also known as Rockwell Hanford Operations' contractor report RHO-BWI-C-44). To keep the original document current, this additions and corrections report was prepared for the Basalt Waste Isolation Project of Rockwell Hanford Operations. This update is supplementary; therefore, references cited in the original document have not been included here. What is included are materials that have become available since the original publication and pertinent literature that had originally been overlooked. Accompany this updated bubliography are index maps that show locations of geologic studies and geochemical petrographic, remanent paleomagnetic, and radiometric age-dated sites within the Columbia River Basalt Group field within Idaho; also identified are archeological sites, test wells, mines, quarries, and other types of excavations. References on the index maps are keyed to the bibliography and cover the Spokane, Pullman, Hamilton, Grangeville, Elk City, Baker, Boise, and Jordan Valley Army Map Service two-degree quadrangles.

Date: January 1, 1980

Creator: Strowd, W.

Object Type: Report

System: The UNT Digital Library

(open access)

The Perry Daily Journal (Perry, Okla.), Vol. 86, No. 293, Ed. 1 Monday, January 14, 1980

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Date: January 14, 1980

Creator: Watson, Milo W.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Perry Daily Journal (Perry, Okla.), Vol. 86, No. 289, Ed. 1 Wednesday, January 9, 1980

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Date: January 9, 1980

Creator: Watson, Milo W.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Perry Daily Journal (Perry, Okla.), Vol. 86, No. 306, Ed. 1 Tuesday, January 29, 1980

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Date: January 29, 1980

Creator: Watson, Milo W.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Clifton Record (Clifton, Tex.), Vol. 85, No. 3, Ed. 1 Thursday, January 17, 1980

Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.

Date: January 17, 1980

Creator: Smith, W. Leon

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Perry Daily Journal (Perry, Okla.), Vol. 86, No. 283, Ed. 1 Wednesday, January 2, 1980

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Date: January 2, 1980

Creator: Watson, Milo W.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Demonstration of direct energy recovery of full energy ions at 40 keV on a PLT/ISX beam system

The desire for multisecond beams in the 80-keV/nucleon energy range at 10 MW/module has emphasized the need for technological advances in several areas. At such beam energies, as much as 75% of the initial beam energy is retained in the unneutralized ion components. As a result, two questions immediately come to mind: how can one dispose of this energy; or better still, how can one efficiently recover this energy. The conventional way of treating such a problem is to deflect the ions out of the neutral beam and onto water-cooled plates or beam dumps. This method has worked satisfactorily for 40-keV/nucleon beams in excess of 1.5 MW and approx. 0.5 s. However, the power per unit area to be disposed of in the high power, multisecond beams mentioned above is beyond present-day technology. We have proposed and demonstrated a unique solution to this problem which not only removes the need for beam dumps but also returns from 50 to 80% of the energy contained in the full energy ion component directly and dynamically to the high voltage supply. In fact, the energy in the residual ion component is not expended. The tests were made on a PLT/ISX type beam line …

Date: January 1, 1980

Creator: Stirling, W. L.; Barber, G. C. & Dagenhart, W. K.

Object Type: Article

System: The UNT Digital Library