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in creator/contributor: "United States. Department of Defense."

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(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

This report presents information concerning field procedures employed during the monitoring, well construction, well purging, sampling, and well logging at the Wright-Patterson Air Force Base. Activities were conducted in an effort to evaluate ground water contamination.

Date: October 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

An environmental investigation of ground water conditions has been undertaken at Wright-Patterson Air Force Base (WPAFB), Ohio to obtain data to assist in the evaluation of a potential removal action to prevent, to the extent practicable, migration of the contaminated ground water across Base boundaries. Field investigations were limited to the central section of the southwestern boundary of Area C and the Springfield Pike boundary of Area B. Further, the study was limited to a maximum depth of… more

Date: March 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Laser diagnostics of H sup minus formation in a magnetic multicusp ion source

The populations of ground electronic state atomic hydrogen and ground electronic state, vibrationally-rotationally excited hydrogen molecules in a negative hydrogen ion source discharge have been measured using vacuum ultraviolet (VUV) laser absorption spectroscopy. Vibrational states up to v=8 and rotational levels as high as J=15 have been measured. The measurements have been made under a range of discharge conditions. The complete vibrational population distribution for v=1-8, J=1 has been o… more

Date: May 1, 1991

Creator: Young, A. T.; Chen, P.; Kunkel, W. B.; Leung, K. N.; Li, C. Y. & Stutzin, G. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Geophysics: Building E5032 decommissioning, Aberdeen Proving Ground

integration of data from surveys using three geophysical technologies has provided information used to define the locations of buried utilities, tanks, vaults, and debris near building E5032 at the Aberdeen Proving Ground. Ground penetrating radar (GPR) profiles indicate the presence of buried pipes, tanks, reinforcement rods (rebar), and remnants of railroad tracks. A magnetic map constructed from a detailed magnetic survey on the north side of the building outlines buried iron-rich objects th… more

Date: July 1, 1991

Creator: McGinnis, L.D. & Miller, S.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

This report contains information related to the sampling and chemical analysis of ground water at the Wright-Patterson Air Force Base. It is part of a field investigation of ground water contamination.

Date: March 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Calculated thickness of tungsten alloy required for specified attenuation of gamma radiation from sup 137 CS

The traditional method of evaluating and calibrating health physics instruments is to use a calibrator that consists of a single high-activity gamma radiation source with different attenuators to select the radiation level desired for tesing. To have accurate radiation intensities inside the calibrator cavity, the attenuators must be designed from precise absorption calculations. This paper reports calculations made to determine the thickness of tungsten alloy metal required for specific attenu… more

Date: January 1, 1991

Creator: Chiles, M. M.; Allin, G. W. & Pace, J. V. III

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Electron beam and high-speed optical diagnostics for the Los Alamos HIBAF (High Brightness Accelerator FEL) Facility

Characterization of the electron beam's properties will be a major task after the upgrade of the Los Alamos Free-Electron Laser (FEL) Facility with a photoelectric injector (PEI) and increased acceleration capability to 40 MeV. Adjustments to the previous diagnostics package that address the lower beam emittance, higher energy, and wakefield source reduction issues will be discussed. 6 refs., 8 figs., 1 tab.

Date: January 1, 1989

Creator: Lumpkin, A. H.; Cornelius, W. D.; Stein, W. E.; Feldman, R. B.; Meier, K. L. & Young, L. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessment of the need for dual indoor/outdoor warning systems and enhanced tone alert technologies in the Chemical Stockpile Emergency Preparedness Program

The need for a dual indoor/outdoor warning system as recommended by the program guidance and Alert and Notification (A N) standard for the Chemical Stockpile Emergency Preparedness Program is analyzed in this report. Under the current program standards, the outdoor warning system consists of omnidirectional sirens and the new indoor system would be an enhanced tone alert (TA) radio system. This analysis identifies various tone-alert technologies, distribution options, and alternative siren conf… more

Date: May 1, 1992

Creator: Sorensen, J.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

In April 1990 Wright-Patterson Air Force Base (WPAFB) initiated an investigation to evaluate a potential CERCLA removal action to prevent, to the extent practicable, the migration of ground-water contamination in the Mad River Valley Aquifer within and across WPAFB boundaries. The action will be based on a Focused Feasibility Study with an Action Memorandum serving as a decision document that is subject to approval by the Ohio Environmental Protection Agency. The first phase (Phase 1) of this e… more

Date: October 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Study of the corrosion rate behavior of ion implanted Fe-based alloys

We report on some studies we have made of the time evolution of the corrosion behavior of ion implanted samples of pure iron, medium carbon steel, and 18-8 Cr-Ni stainless steel. Ti, Cr, Ni, Cu, Mo and Yb were implanted at mean ion energies near 100 keV and at doses up to 1 {times} 10{sup 17} cm{sup {minus}2} using a Mevva metal ion implantation facility. A novel feature of this experiment was the simultaneous implantation with several different implanted species. The implanted samples were imm… more

Date: June 1, 1991

Creator: Weiping, Cai; Wei, Tian; Wu Run (Wuhan Iron and Steel Univ., HB (China)); Godechot, X. & Brown, I. (Lawrence Berkeley Lab., CA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Installation restoration program: Hydrologic measurements with an estimated hydrologic budget for the Joliet Army Ammunition Plant, Joliet, Illinois. [Contains maps of monitoring well locations, topography and hydrologic basins]

Hydrologic data were gathered from the 36.8-mi{sup 2} Joliet Army Ammunition Plant (JAAP) located in Joliet, Illinois. Surface water levels were measured continuously, and groundwater levels were measured monthly. The resulting information was entered into a database that could be used as part of numerical flow model validation for the site. Deep sandstone aquifers supply much of the water in the JAAP region. These aquifers are successively overlain by confining shales and a dolomite aquifer of… more

Date: July 1, 1991

Creator: Diodato, D. M.; Cho, H. E. & Sundell, R. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

In April 1990, Wright-Patterson Air Force Base (WPAFB), initiated an investigation to evaluate a potential Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) removal action to prevent, to the extent practicable, the offsite migration of contaminated ground water from WPAFB. WPAFB retained the services of the Environmental Management Operations (EMO) and its principle subcontractor, International Technology Corporation (IT) to complete Phase 1 of the environmental inv… more

Date: October 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

H sup minus temperature dependencies in a Penning surface-plasma source

Simple analysis of the nearly-Maxwellian angular distribution of the ribbon H{sup {minus}} ions beams extracted from a long, narrow slit on the 8X source yields the H{sup {minus}} temperature, kT{sub H{minus}}. The derived kT{sub H{minus}} are 0.1--0.3 eV for a 2-A dc discharge and 0.7-1.3 eV for a 400-A pulsed discharge. Because this diagnostic method relies on simple electronic techniques, it allows rapid study of the dependencies of kT{sub H{minus}} on the source parameters, such as gas flow… more

Date: January 1, 1991

Creator: Smith, H. V. Jr.; Sherman, J. D.; Geisik, C. & Allison, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

An assessment of the ModSim/TWOS parallel simulation environment

The Time Warp Operating System (TWOS) has been the focus of significant research in parallel, discrete-event simulation (PDES). A new language, ModSim, has been developed for use in conjunction with TWOS. The coupling of ModSim and TWOS is an attempt to address the development of large-scale, complex, discrete-event simulation models for parallel execution. The approach, simply stated, is to provide a high-level simulation-language that embodies well-known software engineering principles combin… more

Date: January 1, 1991

Creator: Rich, D.O. & Michelsen, R.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

MESA 3-D calculations of armor penetration by projectiles with combined obliquity and yaw

We introduce and briefly describe MESA, a new 3-D hydrodynamic code, developed specifically for simulations of armor and anti-armor systems. The code's current capabilities an its planned model improvements and additions are discussed. An Eulerian code using state-of-the-art numerical methods, MESA runs faster and is less affected by spurious numerical diffusion than older codes. It models hydrodynamic flow and the dynamic deformation of solid materials. It uses simple elastic-perfectly plastic… more

Date: January 1, 1989

Creator: Cagliostro, D. J.; Mandell, D. A.; Schwalbe, L. A.; Adams, T. F. & Chapyak, E. J. (Los Alamos National Lab., NM (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Analytical treatment of electron trajectory straightener issues in free-electron lasers

The poincare orbit of the electron's journey must be straight and narrow through a many period FEL. To utilize an available technology level, the straightest wiggler orbit operating point (SWOOP) is chosen by adjusting the spacing parameter of an orbit correction scheme. This eases the requirements for achieving the full potential of FEL wigglers. One quality index, one cost index, two quality factors, two measures of field noise, an improvement index, and a straightener classification scheme a… more

Date: January 1, 1989

Creator: Elliott, C.J.; Quimby, D.C. (Los Alamos National Lab., NM (USA) & Spectra Technology, Inc., Bellevue, WA (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Phase stability in Be-Nb and Be-Nb-Zr intermetallics

Sputter deposition of Be-Nb alloys at low temperature (30{degrees}C) produces an amorphous phase for compositions >5 at.% Nb. A metastable crystalline phase which can be considered a highly faulted form of the Be{sub 12}Nb occurs at higher deposition temperatures or by low-temperature annealing of the amorphous phase. Because of structural similarities, this metastable phase is a precursor to the formation of either Be{sub 12}Nb or Be{sub 17}Nb{sub 2} upon high temperature annealing. There was … more

Date: September 1, 1991

Creator: Brimhall, J.L.; Charlot, L.A. & Bruemmer, S.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Microscopic determination of stress distribution in GaAs grown at low temperature on GaAs (100)

A microscopic strain distribution across commensurate interfaces between GaAs layers grown on semi-insulating GaAs substrates was observed by means of convergent beam electron diffraction (CBED) and large angle convergent beam methods (LACBED). Strain relaxation at a specific distance from the interface was observed in these layers without formation of misfit dislocations. It was proposed that specific point defects distributed close to the interface can explain the asymmetric broadening of hig… more

Date: January 1991

Creator: Liliental-Weber, Z.; Tanaka, M.; Ishikawa, A. & Teriauchi, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A perspective on MoSi sub 2 based composites

MoSi{sub 2} based composites represent an important new class of high temperature structural silicides,'' with significant potential for elevated temperature structural applications in the range of 1200--1600{degrees}C in oxidizing and aggressive environments. The properties of MoSi{sub 2} which make it an attractive matrix for high temperature composites are described and the development history of these materials traced. Latest results on elevated temperature creep resistance, low temperature… more

Date: January 1, 1992

Creator: Petrovic, J.J. (Los Alamos National Lab., NM (United States)) & Vasudevan, A.K. (Office of Naval Research, Arlington, VA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Contingent post-closure plan, hazardous waste management units at selected maintenance facilities, US Army National Training Center, Fort Irwin, California

The National Training Center (NTC) at Fort Irwin, California, is a US Army training installation that provides tactical experience for battalion/task forces and squadrons in a mid- to high-intensity combat scenario. Through joint exercises with US Air Force and other services, the NTC also provides a data source for improvements of training doctrines, organization, and equipment. To meet the training and operational needs of the NTC, several maintenance facilities provide general and direct sup… more

Date: January 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of a portable GC/MS for screening organic contaminants in soil

In an effort to speed up clearance of building-construction sites in the Edgewood Area of Aberdeen Proving Ground. Maryland, Argonne National Laboratory leased a Bruker Instruments Mobile Environmental Monitor (MEM) to analyze for organics in soils. The MEM is a portable gas chromatograph/mass spectrometer (GC/MS). Argonne's MEM was mounted in a Chevy Blazer and driven to each site of interest. The Bruker analytical system uses a probe'' with a thermal devolatilization ring on the end and short… more

Date: January 1, 1992

Creator: Harrison, W.; Reed, L.L. (Armed Services Technical Information Agency, Arlington, VA (United States)); Sandberg, S.A. (Hydro-Terra, Inc., Columbia, MD (United States)) & Anuszewski, C.L. (Corps of Engineers, Baltimore, MD (United States). Baltimore District)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

(Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio)

In April 1990, Wright-Patterson Air Force Base (WPAFB) initiated an effort for the evaluation of potential removal of ground water contamination at the Base. This report presents a current assessment of the nature and extent of the contamination believed to be migrating across the southwestern boundary of Area C and the northern boundary of Area B based upon analysis of existing environmental data obtained from several sources. The existing data base indicates widespread, low-level contaminatio… more

Date: October 1, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development of advanced secondary zinc cells for power-source applications

The general advantages of Zn/AgO batteries are high specific energy, high discharge rate capability, good charge acceptance, and low self-discharge rate. However, the principal disadvantages of high cost and short cycle life have limited the use of this battery to applications where high specific energy is the prime requisite, such as military and flight applications, portable electronic equipment, etc. The major objectives of this research project are to improve the Zn/AgO cell cycle life and … more

Date: December 1, 1991

Creator: Chen, Jenn-Shing; McLarnon, F. R. & Cairns, E. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Grazing-incidence Cerenkov x-ray generation

X-ray Cerenkov radiation can be generated by electrons incident on thin foils. For grazing incidence the Cerenkov radiation intensity can be more than a decade greater than for perpendicular incidence. Experimental results are discussed in terms of a simple formalism. 17 refs., 3 figs.

Date: August 1, 1989

Creator: Moran, Michael J.; Chang, Britton; Schneider, Marilyn B. & Maruyama, Xavier K.

Item Type: Article

Partner: UNT Libraries Government Documents Department