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Displaying 46101 - 46125 of 74220

Kinematic Modeling and Analysis of a Planar Micro-Positioner

January 1, 2001
Author(s)
Nicholas G. Dagalakis, John A. Kramar, E Amatucci, Robert Bunch
The static and dynamic performance of a control system depends on the accuracy of the mathematical model of the plant that is being controlled. In this work, the accuracies of a linear and a second-order kinematic model were evaluated for a two-dimensional

Kinetics of Reactions of H Atoms With Methane and Chlorinated Methanes

January 1, 2001
Author(s)
M G. Bryukov, I R. Slagle, Vadim D. Knyazev
The reactions of H atoms with methane, four chlorinated methanes, and isobutene have been studied experimentally using the Discharge Flow / Resonance Fluorescence technique over wide ranges of temperatures. The rate constants were obtained in direct

Large-Area TKIDs for a New Generation of Neutron Beta Decay Experiments

January 1, 2001
Author(s)
Elizabeth Scott, Jimmy P. Caylor, Maynard S. Dewey, Jiansong Gao, Colin A. Heikes, Shannon Hoogerheide, Hans Pieter Mumm, Jeffrey S. Nico, Joel Ullom, Michael Vissers
Nuclear physics has long played a central role in our efforts to better understand the natural world. Several experiments are well positioned to improve limits in searches for physics Beyond the Standard Model (BSM). Many of the experiments in nuclear

Lasers, Ultrafast Pulse Technology

January 1, 2001
Author(s)
Tracy S. Clement, Scott Diddams, David J. Jones
Ultrafast pulse technology refers to the generation and use of laser pulses with durations in the femtosecond range. These ultrafast pulses are useful for a variety of applications ranging from the scientific study of very fast chemical and biological

Length and Dimensional Measurement at NIST

January 1, 2001
Author(s)
Dennis A. Swyt
This paper reports on the past, present, and future of length and dimensional measurements at NIST. It covers the evolution of the SI unit of length through its three definitions and the evolution of NBS-NIST dimensional measurement from early linescales

Likelihood Models for Two-Stage Neutron Lifetime Experiments

January 1, 2001
Author(s)
Grace L. Yang, Kevin J. Coakley
At the NIST Cold Neutron Research Facility, a multiple run neutron lifetime experiment is underway. Each run of the two-stage experiment consists of a neutron production stage and a neutron decay stage. Salient features of the experimental data are that

Low Voltage Microanalysis using Microcalorimeter EDS

January 1, 2001
Author(s)
David A. Wollman, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Norman F. Bergren, Steven Deiker, John M. Martinis, Martin Huber, Dale Newbury
We present the current performance of the prototype high-resolution microcalorimeter energy-dispersive spectrometer (υcal EDS) developed at NIST for x-ray microanalysis. In particular, the low-energy υcal EDS designed for operation in the energy range from

Magnetic Anisotropy and Thermal Stability of Ta-pinned Spin Valves

January 1, 2001
Author(s)
R A. Fry, Robert D. McMichael, John E. Bonevich, P J. Chen, William F. Egelhoff Jr., Chang H. Lee
It has recently been found that large uniaxial anisotropy fields in excess of 120 kA/m (1500 Oe) can be created in thin (3 nm to 5 nm) films of Co by obliquely sputtered Ta underlayers. This anisotropy can be used to pin the bottom film of a spin valve

Magnetic Combinatorial Thin-Film Libraries

January 1, 2001
Author(s)
Stephen E. Russek, William E. Bailey, G A. Alers
Magnetic combinatorial libraries have been fabricated to investigate complex magnetic thin-film systems and to provide test systems to develop on-wafer metrologies. The use of combinatorial materials techniques is a new and powerful method to develop and
Displaying 46101 - 46125 of 74220