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LANSCE steady state unperturbed thermal neutron fluxes at 100. mu. A

Description: The ''maximum'' unperturbed, steady state thermal neutron flux for LANSCE is calculated to be 2 /times/ 10/sup 13/ n/cm/sup 2/-s for 100 ..mu..A of 800-MeV protons. This LANSCE neutron flux is a comparable entity to a steady state reactor thermal neutron flux. LANSCE perturbed steady state thermal neutron fluxes have also been calculated. Because LANSCE is a pulsed neutron source, much higher ''peak'' (in time) neutron fluxes can be generated than at a steady state reactor source. 5 refs., 5 fi… more
Date: January 1, 1989
Creator: Russell, G. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Equivalent-spherical-shield neutron dose calculations

Description: Neutron doses through 162-cm-thick spherical shields were calculated to be 1090 and 448 mrem/h for regular and magnetite concrete, respectively. These results bracket the measured data, for reinforced regular concrete, of /approximately/600 mrem/h. The calculated fraction of the high-energy (>20 MeV) dose component also bracketed the experimental data. The measured and calculated doses were for a graphite beam stop bombarded with 100 nA of 800-MeV protons. 6 refs., 2 figs., 1 tab.
Date: January 1, 1988
Creator: Russell, G. J. & Robinson, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental program to validate analyses of accelerator breeder concepts

Description: The concept of using high-energy particle accelerators to produce neutrons for converting fertile material to fissile is over 25 years old. It is only relatively recently that accelerator design has progressed to a point where the operation approaches commercial viability. Critical unknowns in the concept were identified in a detailed study of specic configurations. Experiments to elucidate these unknowns in a timely manner using existing material and facilities are defined and identified. Basi… more
Date: January 1, 1977
Creator: Talbert Jr., W. L.; Russell, G. J. & Malenfant, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Infinite Slab-Shield Dose Calculations

Description: I calculated neutron and gamma-ray equivalent doses leaking through a variety of infinite (laminate) slab-shields. In the shield computations, I used, as the incident neutron spectrum, the leakage spectrum (<20 MeV) calculated for the LANSCE tungsten production target at 90{degree} to the target axis. The shield thickness was fixed at 60 cm. The results of the shield calculations show a minimum in the total leakage equivalent dose if the shield is 40-45 cm of iron followed by 20-15 cm of borate… more
Date: January 1, 1989
Creator: Russell, G. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shielding concerns at a spallation source

Description: Neutrons produced by 800-MeV proton reactions at the Los Alamos Neutron Scattering Center spallation neutron source cause a variety of challenging shielding problems. We identify several characteristics distinctly different from reactor shielding and compute the dose attenuation through an infinite slab/shield composed of iron (100 cm) and borated polyethylene (15 cm). Our calculations show that (for an incident spallation spectrum characteristic of neutrons leaking from a tungsten target at 90… more
Date: January 1, 1989
Creator: Russell, G. J.; Robinson, H.; Legate, G. L. & Woods, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shielding the LANSCE (Los Alamos Neutron Scattering Center) 800-MeV spallation neutron source

Description: Neutrons produced by medium-energy (800-MeV) proton reactions at the Los Alamos Neutron Scattering Center spallation neutron source cause a variety of difficult shield problems. We describe the general shielding questions encountered at such a spallation source, and contrast spallation and reactor source shielding issues using an infinite slab-shield composed of 100 cm of iron and 15 cm of borated polyethylene. The calculations show that (for an incident spallation spectrum characteristic of ne… more
Date: January 1, 1988
Creator: Russell, G. J.; Legate, G. L.; Robinson, H. & Woods, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fertile-to-fissile and fission measurements for depleted uranium bombarded by 800-MeV protons

Description: Axial distributions of fertile-to-fissile conversions (/sup 238/U to /sup 239/Pu) and fissions have been measured for a thick depleted uranium target bombarded by 800-MeV protons. The /sup 239/Pu production was determined by measuring the amount of /sup 239/Np produced. The axial distributions were integrated to get the total conversions and fissions occurring in the target. Preliminary experimental results give 3.81 +- 0.19 /sup 239/Np atoms produced per incident proton and 5.59 +- 0.56 fissio… more
Date: January 1, 1981
Creator: Russell, G. J.; Gilmore, J. S.; Robinson, H. & Prael, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of a lead reflector for a pulsed neutron source

Description: This paper examines the consequences of adopting a non-moderating reflector and compares its performance to that of beryllium. Reflector studies on a time modulated source have shown lead to be an excellent reflector, maintaining the structure of the long time pulse (500 ..mu..s) marginally better than beryllium and with a slightly superior yield. Engineering, fabrication and cost factors as well as improved gamma and fast neutron shielding properties further favour lead as a reflector for thes… more
Date: January 1, 1982
Creator: Taylor, A. D.; Russell, G. J.; Meier, M. M. & Robinson, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Moderated-neutron pulse shapes

Description: The time dependence of the neutron pulse from hydrogeneous moderators is well known in the slowing down region. The full width at half maximum, ..delta..t/sub 50/, behaves as 2/..sqrt..E when time is measured in ..mu..s and energy in eV. The shape of the pulse throughout the slowing down region is a universal function of vt, phi(v,t) = (..sigma../sub s/vt)/sup 2/ exp (-..sigma../sub s/vt). In this equation, v is the neutron velocity, ..sigma../sub s/ the macroscopic cross section of the moderat… more
Date: January 1, 1982
Creator: Taylor, A. D.; Russell, G. J.; Meier, M. M. & Robinson, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Drying crude drugs.

Description: Explains the fundamental principles of drying crude vegetable drugs. Provides drawings and instructions for constructing two types of driers.
Date: November 1921
Creator: Russell, G. A.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Spallation source neutron target systems

Description: This is the final report for a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project sought to design a next-generation spallation source neutron target system for the Manuel Lujan, Jr., Neutron Scattering Center (LANSCE) at Los Alamos. It has been recognized for some time that new advanced neutron sources are needed in the US if the country is to maintain a competitive position in several important scientific and technol… more
Date: July 1, 1996
Creator: Russell, G.; Brown, R.; Collier, M. & Donahue, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lansce liquid hydrogen moderator system hardware-characteristic-operation

Description: In this paper, we report the current status of the hardware development and testing program for a liquid hydrogen moderator system currently being fabricated for installation into the Los Alamos Neutron Scattering Center (LANSCE) upgraded target system.
Date: January 1, 1985
Creator: Robinson, H.; Russell, G. J.; Tucker, E.; Whitaker, R.; Williamson, K. & Edeskuty, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Target station design for a 1 MW pulsed spallation neutron source

Description: Target stations are vital components of the 1 MW, next generation spallation neutron source proposed for LANSCE. By and large, target stations design determines the overall performance of the facility. Many traditional concepts will probably have to be rethought, and many new concepts will have to be put forward to meet the 1 MW challenge. This article gives a brief overview of the proposed neutron spallation source from the target station viewpoint, as well as the general philosophy adopted fo… more
Date: December 31, 1993
Creator: Russell, G. J.; Baker, G. D. & Brewton, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reference moderator calculated performance for the LANSCE upgrade project

Description: The authors have calculated the performance of five moderators of interest to the LANSCE upgrade project. Coupled and decoupled light water and liquid hydrogen moderators in flux-trap geometry surrounded by a neutronically infinite heavy-water cooled beryllium reflector have been studied. Time and energy spectra, as well as semi-empirical fits to the data, are presented. The data has been made available to aid the instrument design and moderator selection process.
Date: December 1, 1995
Creator: Ferguson, P. D.; Russell, G. J. & Pitcher, E. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Introduction to spallation physics and spallation-target design

Description: When coupled with the spallation process in appropriate target materials, high-power accelerators can be used to produce large numbers of neutrons, thus providing an alternate method to the use of nuclear reactors for this purpose. Spallation offers exciting new possibilities for generating intense neutron fluxes for a variety of applications, including: (a) spallation-neutron sources for materials science research; (b) accelerator-based production of tritium; (c) accelerator-based transmutatio… more
Date: March 1, 1995
Creator: Russell, G. J.; Pitcher, E. J. & Daemen, L. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coupled moderator neutronics

Description: Optimizing the neutronic performance of a coupled-moderator system for a Long-Pulse Spallation Source is a new and challenging area for the spallation target-system designer. For optimal performance of a neutron source, it is essential to have good communication with instrument scientists to obtain proper design criteria and continued interaction with mechanical, thermal-hydraulic, and materials engineers to attain a practical design. A good comprehension of the basics of coupled-moderator neut… more
Date: December 1, 1995
Creator: Russell, G. J.; Pitcher, E. J. & Ferguson, P. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spallation target-moderator-reflector studies at the Weapons Neutron Research facility. [800-MeV p]

Description: Basic neutronics data, initiated by 800-MeV proton spallation reactions, are important to spallation neutron source development and electronuclear fuel production. Angle-dependent and energy-dependent neutron production cross sections, energy-dependent and total neutron yields, thermal and epithermal neutron surface and beam fluxes, and fertile-to-fissile conversion ratios are being measured. The measurements are being done at the Weapons Neutron Research facility on a variety of targets and ta… more
Date: January 1, 1980
Creator: Russell, G. J.; Gilmore, J. S.; Prael, S. D.; Robinson, H. & Howe, S. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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International workshop on cold neutron sources

Description: The first meeting devoted to cold neutron sources was held at the Los Alamos National Laboratory on March 5--8, 1990. Cosponsored by Los Alamos and Oak Ridge National Laboratories, the meeting was organized as an International Workshop on Cold Neutron Sources and brought together experts in the field of cold-neutron-source design for reactors and spallation sources. Eighty-four people from seven countries attended. Because the meeting was the first of its kind in over forty years, much time was… more
Date: August 1, 1991
Creator: Russell, G. J. & West, C. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The drag of inflatable rubber de-icers

Description: Force tests on rubber de-icer models of several different profiles, at approximately one-third full scale, been carried out in the NACA 8-foot high speed wind tunnel. The conventional de-icer installation, deflated, added about 15 percent to the smooth-wing drag and, inflated, added about 100 percent. An improved installation with flash attaching strips added about 10 percent, deflated. The bulging, or ballooning, of de-icers from the wing surface is described and some remedies are discussed.
Date: October 1938
Creator: Robinson, Russell G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Surface Irregularities on Wing Drag 4 - Manufacturing Irregularities

Description: "Tests were made in the NACA 8-foot high speed wind tunnel of a metal-covered, riveted, 'service' wing of average workmanship to determine the aerodynamic effects of the manufacturing irregularities incident to shop fabrication. The wing was of 5-foot chord and of NACA 23012 section and was tested in the low-lift range at speeds from 90 to 450 miles per hour corresponding to Reynolds numbers from 4,000,000 to 18,000,000. At a cruising condition the drag of the service wing was 46% higher than t… more
Date: February 1938
Creator: Robinson, Russell G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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