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Displaying 49151 - 49175 of 73779

Domain-Engineered Pyroelectric Radiometer

December 1, 1999
Author(s)
John H. Lehman, George P. Eppeldauer, J A. Aust, M. Racz
We built a large-area domain-engineered pyroelectric radiometer with high spatial and spectral response uniformity that is an excellent primary transfer standard for measurements in the near- and the mid-infrared wavelength regions.

Electrical Control of the Spatial Uniformity of Reactive Species in Plasmas

December 1, 1999
Author(s)
Mark A. Sobolewski, Kristen L. Steffens
We report a new method for controlling the spatial distribution of reactive chemical species in a parallel-plate reactor, by means of a variable-impedance load placed between the unpowered electrode and ground. The technique was demonstrated in 89% CF(sub4

Energy Dispersive X-Ray Spectrometry With the Transition Edge Sensor Microcalorimeter: A Revolutionary Advance in Materials Microanalysis

December 1, 1999
Author(s)
Dale E. Newbury, David A. Wollman, Kent D. Irwin, Gene C. Hilton, John M. Martinis
The NIST microcalorimeter energy dispersive x-ray spectrometer provides important advances in x-ray spectrometry. The high spectral resolution, approaching 2 eV for photon energies below 2 keV, the wide photon energy coverage, 250 eV to 10 keV, and the

Equivalent Circuit Models for Coaxial OSLT Standards

December 1, 1999
Author(s)
Donald C. DeGroot, K. L. Reed, Jeffrey Jargon
We use a general description of transmission lines to develop analytic descriptions for offset OSLT (Open-Short-Load-Thru) standards used to calibrate vector network analyzers.

Exposure Parameters During Studies with ELF Magnetic and Electric Fields

December 1, 1999
Author(s)
Martin Misakian
Following a brief introduction to terminology that describes power frequency and other extremely low frequency [ELF] magnetic and electric fields, a short survey is given of methods for simulating and characterizing in a laboratory setting fields
Displaying 49151 - 49175 of 73779
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