8,278 Matching Results

Search Results

Advanced search parameters have been applied.

Radiation and recovery corrections and time constants of several chromel-alumel thermocouple probes in high-temperature, high-velocity gas streams

Description: Report presenting an experimental determination of radiation and recovery corrections and time constraints for several designs of shielded and unshielded thermocouple probes using chromel-alumel wire. Radiation and time constant data were obtained for Mach numbers from 0.3 to 0.9 and a range of static pressures and temperatures. Tables and graphs are presented which show the correction factors of the various designs to aid in selecting a probe for a particular application.
Date: October 1956
Creator: Glawe, George E.; Simmons, Frederick S. & Stickney, Truman M.
Partner: UNT Libraries Government Documents Department

1.06 μm 150 psec laser damage study of diamond turned, diamond turned/ polished and polished metal mirrors

Description: Using a well characterized 1.06 μm 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45$sup 0$ with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)
Date: July 24, 1975
Creator: Saito, T. T.; Milam, D.; Baker, P. & Murphy, G.
Partner: UNT Libraries Government Documents Department

Neutron Soft Errors in Xilinx FPGAs at Lawrence Berkeley National Laboratory

Description: The LBNL 88-Inch Cyclotron offers broad-spectrum neutrons for single event effects testing. We discuss results from this beamline for neutron soft upsets in Xilinx Virtex-4 and -5 field-programmable-gate-array (FPGA) devices.
Date: July 25, 2008
Creator: George, Jeffrey S.; Koga, Rocky & McMahan, Margaret A.
Partner: UNT Libraries Government Documents Department

Standard Practice for Dosimetry of Proton Beams for use in Radiation Effects Testing of Electronics

Description: Representatives of facilities that routinely deliver protons for radiation effect testing are collaborating to establish a set of standard best practices for proton dosimetry. These best practices will be submitted to the ASTM International for adoption.
Date: July 25, 2008
Creator: McMahan, Margaret A.; Blackmore, Ewart; Cascio, Ethan W.; Castaneda, Carlos; von Przewoski, Barbara & Eisen, Harvey
Partner: UNT Libraries Government Documents Department

Papers Prepared for Radiation Effects Review Meeting, Congress Hotel, Chicago, July 31-August 1, 1956

Description: Research in radiation effects on reactor materials is reviewed in ten papers presented by representatives of Oak Ridge National Laboratory, General Electric Company, knolls Atomic Power Laboratory, Dattelle Memorial Institute, Brookhaven Nationaal Laboratory, Argonne National Laboratory, Bettis Plant, and Atomic Power Development Associates. Separate abstracts have been prepared for each paper. (T.R.H.)
Date: August 1, 1956
Partner: UNT Libraries Government Documents Department

Radiation-enhanced diffusion in metals and alloys

Description: Some phenomena that involves diffusion during irradiation include fission-product redistribution in reactor fuels, defect clustering in CTR walls or fast-reactor cladding, smearing-out of gradients in ion-implanted semiconductors, and microstructure development in a HVEM. This paper is a review of the basics of radiation-enhanced diffusion (REM). The present status of REM today is somewhat the same as diffusion in the 1940's, and recommendations are made for further work. 105 references. (DLC)
Date: January 1, 1975
Creator: Lam, N.Q. & Rothman, S.J.
Partner: UNT Libraries Government Documents Department