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Experimental attempt to achieve microstructure variations through temperature/time permutations for a nonwrought powder metallurgy uranium-6 niobium alloy

Description: The powder metallurgical processing of uranium-6 niobium (U-6Nb) alloy has undergone 3 years of characterization at the Oak Ridge Y-12 Plant. The current structure of the powder metallurgy (P/M) alloy has been described as duplex: a mixture of two or more distinct grain sizes. An experiment was conducted to determine a gamma stabilizing heat treatment (time and temperature combination) to produce a structure consisting of one gamma grain size. Two heat treatments were found to produce an irregu… more
Date: June 7, 1985
Creator: Alexander-Morrison, G.M.
Item Type: Refine your search to only Report
open access

An experimental study of the SSC (Superconducting Super Collider) magnet aperture criterion

Description: A beam dynamics experiment, performed in the Fermilab Tevatron, that was mainly motivated by planning for the Superconducting Super Collider (SSC) is described. Nonlinearities are introduced in the Tevatron by special sextupoles in order to stimulate the SSC environment. ''Smear'' is one of the parameters used to characterize the deviation from linear behavior. Smear is extracted from experimental data and compared with calculation over a wide range of conditions. The agreement is excellent. Th… more
Date: June 7, 1988
Creator: Merminga, N.; Edwards, D.; Finley, D.; Gerig, R.; Gelfand, N.; Harrison, M. et al.
Item Type: Refine your search to only Article
open access

Inversion approach for thermal data from a convecting hydrothermal system. Revision 1

Description: Hydrothermal systems are often studied by collecting thermal gradient data and temperature-depth curves. These data contain important information about the flow field, the evolution of the hydrothermal system, and the location and nature of the ultimate heat sources. Thermal data are conventionally interpreted by the ''forward'' method; the thermal field is calculated based on selected initial conditions and boundary conditions such as temperature and permeability distributions. If the calculat… more
Date: June 7, 1985
Creator: Kasameyer, P.; Younker, L. & Hanson, J.
Item Type: Refine your search to only Article
open access

New theoretical approaches for studying electron collisions with small molecules

Description: There has been a recent resurgence of interest in the use of algebraic variational methods for studying a variety of collision problems. Much of this interest stems from the discovery that spurious singularities, which plagued the traditional methods, can be eliminated when the variational principle is formulated with outgoing-wave boundary conditions. Another reason for the recent activity is the obvious suitability of these methods to present-day supercomputers. My purpose here is to describe… more
Date: June 7, 1989
Creator: Rescigno, T. N.
Item Type: Refine your search to only Article
open access

Pulse-power circuit diagnostics for the Nova laser

Description: The Nova laser will have a large pulse power system for driving laser amplifiers, incorporating approximately 1600 flashlamp circuits. An automated system has been designed for diagnosing the condition of these flashlamp circuits. It records digitized circuit current waveforms and detects current excursions above a given threshold. In addition, it is able to fire flashlamps at a low energy to ascertain the health of the system. Data from this system can be ploted for inspection by the operator,… more
Date: June 7, 1982
Creator: Christie, D. J.; Dallum, G. E.; Gritton, D. G.; Merritt, B. T.; Whitham, K. & Berkbigler, L. W.
Item Type: Refine your search to only Article
open access

Removal of transuranics from Johnston Island soil by fractional classification

Description: The following conclusions were reached as a result of the research conducted with the TRUclean process on Johnston Island: Processed materials will have a total TRU activity of less than 500 Bq/Kg. Approximately 90% of the TRU activity in coral/soil is removed by a single pass through the fractional classification process. A volume reduction of greater than 90% of the original contaminated volume can be achieved with the returned ''clean'' volume less than or equal to the cleanup criteria. Repr… more
Date: June 7, 1987
Creator: Sunderland, N.R.
Item Type: Refine your search to only Article
open access

The use of the Fermilab antiproton Accumulator in medium energy physics experiments

Description: The Fermilab antiprotron Accumulator has been modified for use in a medium energy experiment. The experiment is conducted with circulating antiproton beam of momentum between 6.7 GeV/c and 3.7 GeV/c colliding with protons from an internal gas jet. Antiprotons are accumulated at the normal momentum of 8.9 GeV/c and then decelerated to the appropriate energy. It is necessary to cool the beam continually during the time it is colliding with the gas jet. The experiment requires new provisions for t… more
Date: June 7, 1988
Creator: Bharadwaj, V.; Church, M.; Harms, E.; Hsueh, S.Y.; Kells, W.; MacLachlan, J. et al.
Item Type: Refine your search to only Article
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