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237 Matching Results
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Development of an ion source for long-pulse (30-s) neutral beam injection
This paper describes the development of a long-pulse positive ion source that has been designed to provide high brightness deuterium beams (divergence approx. = 0.25/sup 0/ rms, current density approx. = 0.15 A cm/sup -2/) of 40 to 45 A, at a beam energy of 80 keV, for pulse lengths up to 30 s. The design and construction of the ion source components are described with particular emphasis placed on the long-pulse cathode assembly and ion accelerator.
Date:
January 1, 1982
Creator:
Menon, M. M.; Barber, G. C.; Blue, C. W.; Dagenhart, W. K.; Gardner, W. L.; Haselton, H. H. et al.
Object Type:
Article
System:
The UNT Digital Library
Impact of entrainment and impingement on fish populations in the Hudson River estuary. Volume I. Entrainment-impact estimates for six fish populations inhabiting the Hudson River estuary
This volume is concerned with the estimation of the direct (or annual) entrainment impact of power plants on populations of striped bass, white perch, Alosa spp. (blueback herring and alewife), American shad, Atlantic tomcod, and bay anchovy in the Hudson River estuary. Entrainment impact results from the killing of fish eggs, larvae, and young juveniles that are contained in the cooling water cycled through a power plant. An Empirical Transport Model (ETM) is presented as the means of estimating a conditional entrainment mortality rate (defined as the fraction of a year class which would be killed due to entrainment in the absence of any other source of mortality). Most of this volume is concerned with the estimation of several parameters required by the ETM: physical input parameters (e.g., power-plant withdrawal flow rates); the longitudinal distribution of ichthyoplankton in time and space; the duration of susceptibility of the vulnerable organisms; the W-factors, which express the ratios of densities of organisms in power plant intakes to densities of organisms in the river; and the entrainment mortality factors (f-factors), which express the probability that an organism will be killed if it is entrained. Once these values are obtained, the ETM is used to …
Date:
January 1, 1982
Creator:
Boreman, J.; Barnthouse, L. W.; Vaughn, D. S.; Goodyear, C. P.; Christensen, S. W.; Kumar, K. D. et al.
Object Type:
Report
System:
The UNT Digital Library
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 299, Ed. 1 Saturday, January 23, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 23, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 291, Ed. 1 Thursday, January 14, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 14, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 285, Ed. 1 Thursday, January 7, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 7, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 290, Ed. 1 Wednesday, January 13, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 13, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 88, No. 298, Ed. 1 Friday, January 22, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 22, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 302, Ed. 1 Wednesday, January 27, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 27, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 87, No. 1, Ed. 1 Thursday, January 7, 1982
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
January 7, 1982
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Experiments to determine the migration potential for water and contaminants in shallow land-burial facilities: design, emplacement, and preliminary results
Although there have been many laboratory studies on water movement and contaminant transport, there is a need for more large scale field experiments. Large scale field experiments are necessary to (1) measure hydraulic conductivities on a scale typical of actual shallow land burial facilities and hazardous waste disposal facilities, (2) allow comparisons to be made between full scale and laboratory measurements, (3) verify the applicability of calculational methods for determining unsaturated hydraulic conductivities from water retention curves, and (4) for model validation. Experiments that will provide the information to do this are described in this paper. The results of these experiments will have applications for both the shallow land burial of low level radioactive wastes and the disposal of hazardous chemical wastes. These experiments will provide results that can be used in model verification for system performance. This type of data on experiments done at this scale has not been available, and are necessary for validating unsaturated transport models and other models used to predict long term system performance. Even though these experiments are done on crushed Bandelier Tuff, most models use physical properties of the backfill material such as density, porosity, and water retention curves. For this reason, once …
Date:
January 1, 1982
Creator:
DePoorter, G. L.; Abeele, W. V. & Burton, B. W.
Object Type:
Article
System:
The UNT Digital Library
The Perry Daily Journal (Perry, Okla.), Vol. 88, No. 303, Ed. 1 Thursday, January 28, 1982
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 28, 1982
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Experiments with highly ionized low-energy tandem accel-decel beams
The present status of the production of low-energy highly ionized beams by the 4-stage tandem accel-decel method is surveyed, and their use in three atomic physics experiments is summarized. The experiments are: the measurement of the charge state dependence of K-x-ray production in S/sup +q/-Ar collisions at 10 MeV, the impact-parameter dependence of quasimolecular x rays in S/sup +15/-Ar collisions again at 10 MeV, and the determination of charge transfer cross sections in S/sup +q/ + Ar, He collisions. The results of the three experiments give evidence that the 4-stage accel-decel ion production technique is extremely powerful and useful.
Date:
January 1, 1982
Creator:
Jones, K. W.; Johnson, B. M.; Meron, M.; Da-Hai, W.; Thieberger, P.; Barrette, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Poloidal OHMIC heating in a multipole
The feasibility of using poloidal currents to heat plasmas confined by a multipole field has been examined experimentaly in Tokapole II. The machine is operated as a toroidal octupole, with a time-varying toroidal magnetic field driving poloidal plasma currents I/sub plasma/ - 20 kA to give densities n/sub e/ - 10/sup 13/ cm/sup -3/ and temperatures T/sub e/ - 30 eV.
Date:
January 1, 1982
Creator:
Holly, D.J.
Object Type:
Report
System:
The UNT Digital Library
Assessment of low-temperature geothermal resources of the United States - 1982
Separate abstracts were prepared for six papers. (MHR)
Date:
January 1, 1982
Creator:
Reed, M.J. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Texas Jewish Post (Fort Worth, Tex.), Vol. 36, No. 1, Ed. 1 Thursday, January 7, 1982
Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date:
January 7, 1982
Creator:
Wisch, J. A. & Wisch, Rene
Object Type:
Newspaper
System:
The Portal to Texas History
Initial operation and performance of the PDX neutral-beam injection system
In 1981, the joint ORNL/PPPL PDX neutral beam heating project succeeded in reliably injecting 7.2 MW of D/sup 0/ into the PDX plasma, at nearly perpendicular angles, and achieved ion temperatures up to 6.5 keV. The expeditious achievement of this result was due to the thorough conditioning and qualification of the PDX neutral beam ion sources at ORNL prior to delivery coupled with several field design changes and improvements in the injection system made at PPPL as a result of neutral beam operating experience with the PLT tokamak. It has been found that the operation of high power neutral beam injection systems in a tokamak-neutral beam environment requires procedures and performance different from those required for development operation on test stands. In this paper, we review the installatin of the PDX neutral beam injection system, and its operation and performance during the initial high power plasma heating experiments with the PDX tokamak.
Date:
January 19, 1982
Creator:
Kugel, H. W.; Eubank, H. P.; Kozub, T. A.; Rossmassler, J. E.; Schilling, G.; van Halle, A. et al.
Object Type:
Report
System:
The UNT Digital Library
Uncertainty estimates for predictions of the impact of breeder-reactor radionuclide releases
This paper summarizes estimates, compiled in a larger report, of the uncertainty associated with models and parameters used to assess the impact on man radionuclide releases to the environment by breeder reactor facilities. These estimates indicate that, for many sites, generic models and representative parameter values may reasonably be used to calculate doses from annual average radionuclide releases when these calculated doses are on the order of one-tenth or less of a relevant dose limit. For short-term, accidental releases, the uncertainty in the dose calculations may be much larger than an order of magnitude. As a result, it may be necessary to incorporate site-specific information into the dose calculation under such circumstances. However, even using site-specific information, inherent natural variability within human receptors, and the uncertainties in the dose conversion factor will likely result in an overall uncertainty of greater than an order of magnitude for predictions of dose following short-term releases.
Date:
January 1, 1982
Creator:
Miller, C. W. & Little, C. A.
Object Type:
Article
System:
The UNT Digital Library
Studies of Photoionization Processes From Ground-State and Excited-State Atoms and Molecules
Recent triply-differential photoelectron spectroscopy experiments designed for the study of correlation effects in atoms and molecules are described. Final-state symmetry of the n=2 state of helium has been determined. The non-Franck-Condon behavior of vibrational branching ratios and large variations of the angular asymmetry parameter has been observed for shape resonances and autoionizing resonances in CO and other molecules. Recent observations of the photoionization of excited sodium atoms are also described.
Date:
January 1, 1982
Creator:
Ederer, D. L.; Parr, A. C. & West, J. B.
Object Type:
Article
System:
The UNT Digital Library
Fast-neutron capture cross sections
SEparate abstracts were prepared for 30 of the 39 papers presented. Nine papers wre previously included in the data base. (WHK)
Date:
January 1, 1982
Creator:
Smith, A. B. & Poenitz, W. P. (eds.)
Object Type:
Article
System:
The UNT Digital Library
Determination of species yield of ion sources used for intense neutral-beam injection
For efficient plasma heating, ion sources of neutral-beam injectors should be capable of producing ion beams with an atomic fraction of 90% or higher. Diagnostic techniques for quantitatively determining source species yield have been developed and evaluated. These include magnetic momentum analysis of the unneutralized ions passing through the neutralizer, energy analysis of the neutral beam by electrostatic separation of ions emanating from a stripping cell, and quantity vs implantation-depth analysis of hydrogen implanted into a crystal by SIMS technique. The operational features and advantages and disadvantages of each technique will be discussed. If the effects of beamlet optics, energy straggling in the accelerator, and neutralizer gas scattering are taken into account, the results of the measurements using the three techniques are shown to be mutually consistent within experimental error.
Date:
January 1, 1982
Creator:
Tsai, C. C.; Barnett, C. F.; Haselton, H. H.; Langley, R. A. & Stirling, W. L.
Object Type:
Article
System:
The UNT Digital Library
Low- to Moderate-Temperature Geothermal Resource Assessment for Nevada: Area Specific Studies, Pumpernickel Valley, Carlin and Moana. Final Report June 1, 1981-July 31, 1982
Geological, geophysical and geochemical surveys were used in conjunction with temperature gradient hole drilling to assess the geothermal resources in Pumpernickel Valley and Carlin, Nevada. This program is based on a statewide assessment of geothermal resources that was completed in 1979. The exploration techniques are based on previous federally-funded assessment programs that were completed in six other areas in Nevada and include: literature search and compilation of existing data, geologic reconnaissance, chemical sampling of thermal and non-thermal fluids, interpretation of satellite imagery, interpretation of low-sun angle aerial photographs, two-meter depth temperature probe survey, gravity survey, seismic survey, soil-mercury survey, and temperature gradient drilling.
Date:
January 1, 1982
Creator:
Trexler, D. T.; Flynn, T.; Koenig, B. A.; Bell, E. J. & Ghusn, G., (Jr.)
Object Type:
Report
System:
The UNT Digital Library
Advanced design of positive-ion sources for neutral-beam applications
The APIS ion source is being developed to meet a goal of producing ion beams of less than or equal to 200 keV, 100 A, with 10-30-s pulse lengths. In a continuing effort to advance the state of the art and to produce long pulse ion beams, APIS ion sources with grid dimensions of 10 x 25 cm, 13 x 43 cm, and 16 x 48 cm are being developed. In the past year, the 10- x 25-cm ion source has been operated to produce ion beams in excess of 100 keV for many seconds pulse length. An advanced design concept is being pursued with the primary objectives to improve radiation protection, reduce fabrication costs, and simplify maintenance. The source magnetic sheild will be designed as a vacuum enclosure to house all source components. The electrical insulation requirements of energy recovery are also considered. Because of the frequent maintenance requirements, the electron emitter assembly will be designed with a remote handling capability. A new accelerator design which incorporates the necessary neutron shielding and associated steering gimbal system is also described.
Date:
January 1, 1982
Creator:
Marguerat, E. F.; Haselton, H. H.; Menon, M. M.; Schechter, D. E.; Stirling, W. L. & Tsai, C. C.
Object Type:
Article
System:
The UNT Digital Library
The Big Lake Wildcat (Big Lake, Tex.), Vol. 57, No. 1, Ed. 1 Thursday, January 7, 1982
Weekly newspaper from Big Lake, Texas that includes local, state and national news along with advertising.
Date:
January 7, 1982
Creator:
Werst, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Big Lake Wildcat (Big Lake, Tex.), Vol. 57, No. 3, Ed. 1 Thursday, January 21, 1982
Weekly newspaper from Big Lake, Texas that includes local, state and national news along with advertising.
Date:
January 21, 1982
Creator:
Werst, David
Object Type:
Newspaper
System:
The Portal to Texas History