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ENVIRONMENTAL SAMPLING AND ANALYSIS - GETTING IT RIGHT

Description: The Department of Energy's Hanford Site in southeastern Washington State was established in the 1940s as part of the Manhattan Project. Hanford's role was to produce weapons-grade nuclear material for defense, and by 1989, when the Site's mission changed from operations to cleanup, Hanford had produced more than 60 percent of the nation's plutonium. The legacy of Hanford's production years is enormous in terms of nuclear and hazardous waste, especially the 270 billion gallons of contaminated gr… more
Date: January 22, 2008
Creator: CW, CONNELL
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Real-time X-ray Diffraction Measurements of Shocked Polycrystalline Tin and Aluminum

Description: A new, fast, single-pulse x-ray diffraction (XRD) diagnostic for determining phase transitions in shocked polycrystalline materials has been developed. The diagnostic consists of a 37-stage Marx bank high-voltage pulse generator coupled to a needle-and-washer electron beam diode via coaxial cable, producing line and bremsstrahlung x-ray emission in a 35-ns pulse. The characteristic Kα lines from the selected anodes of silver and molybdenum are used to produce the diffraction patterns, with thin… more
Date: November 22, 2008
Creator: Dane V. Morgan, Don Macy, Gerald Stevens
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Characteristics of KE Basin Sludge Samples Archived in the RPL - 2007

Description: Samples of sludge were collected from the K East fuel storage basin (KE Basin) floor, contiguous pits (Weasel Pit, North Load Out Pit, Dummy Elevator Pit, and Tech View Pit), and fuel storage canisters between 1995 and 2003 for chemical and radionuclide concentration analysis, physical property determination, and chemical process testing work. Because of the value of the sludge in this testing and because of the cost of obtaining additional fresh samples, an ongoing program of sludge preservati… more
Date: November 22, 2011
Creator: Delegard, Calvin H.; Schmidt, Andrew J. & Chenault, Jeffrey W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Unique microchannel plate process doubles MCPI resolution

Description: Applying a dielectric layer to the output of a microchannel plate (MCP) has allowed the screen voltage of a sealed microchannel-plate intensifier tube (MCPI) to be raised to over 10 kV, producing a field strength of 36 kV/mm without any detectable field emission or breakdown of the MCP/screen gap. Tube resolution exceeded 16 lp/mm at 50% modulation. Breakdown is higher in a dielectric than in a vacuum. In a concept being patented by Gary Power, a few-{mu}m-thick layer of a dielectric was sputte… more
Date: August 22, 1994
Creator: Thomas, S. & Power, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Bunch shape measurement of CW heavy-ion beam.

Description: An accurate bunch shape measurement is one of the most important tasks during the fine tuning of multicavity accelerators. A device for the measurement of bunch time structure of cw heavy-ion beams with time resolution {approx}20 picoseconds was developed, constructed and commissioned at ATLAS which is a 50 MV superconducting heavy-ion linac. The Bunch Shape Monitor (BSM) is based on the analysis of secondary electrons produced by a primary beam hitting a tungsten wire to which a potential of -… more
Date: August 22, 2002
Creator: Vinogradov, N. Y.; Billquist, P.; Ostroumov, P. N.; Pardo, R. C.; Portillo, M.; Sharamentov, S. I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sub-Microsecond Decay Time Phosphors for Pressure Sensitive Paint Applications

Description: The results suggest that garnet phosphors can be engineered to function thermographically over desired temperature ranges by adjusting gallium content. Substituting gadolinium for the yttrium in the host matrix also has an effect but it is not as large. A silicate phosphor showed the greatest temperature dependence though it could not be excited to fluoresce by a blue LED. All the garnet phosphors could be excited with such a blue source. Two phosphors tested showed an increase in intensity wit… more
Date: March 22, 2001
Creator: Allison, S.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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