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Metrology

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Displaying 226 - 250 of 5208

Calculation of magnetic forces and torques on the Kibble coil

October 22, 2022
Author(s)
Stephan Schlamminger, Lorenz Keck, Frank Seifert, Leon Chao, Darine El Haddad, Shisong Li
Analytically the force and torques on a coil in a field of magnetic flux density can be calculated one of two ways. The line integral can be conducted along the coil's wire, summing up the differential force contribution. For each differential line segment

2022 NCWM-NIST National Survey on 20 lb LPG (Propane) Cylinders

October 19, 2022
Author(s)
David Sefcik, Katrice Lippa, N. Alan Heckert, Stephen Benjamin, Ivan Hankins, Don Onwiler
The National Conference on Weights and Measures (NCWM) in partnership and cooperation with the NIST Office of Weights and Measures (OWM) and the Weights and Measures Divisions of select U.S. States initiated the 2022 National Survey on 20 lb LPG (Propane)

The Digital NIST: Challenges and opportunities in the digital transformation of NIST's calibration services

September 21, 2022
Author(s)
Catherine Cooksey, James A. Fedchak, Robert Hanisch, Gregory (Greg) C. Cala, Damian Lauria, Raymond Plante, Benjamin Long, John S. Quintavalle, Manmohan Moodra
Early in 2022 NIST embarked on a pilot project to produce digital calibration reports and certificates of analysis for reference materials. The goal of the project was to produce a few examples of each for the purpose of assessing the scope and challenges

The Digital NIST: Challenges And Opportunities in the Digital Transformation of NIST's Reference Materials

September 21, 2022
Author(s)
William Dinis Camara, Steven J. Choquette, Katya Delak, Robert Hanisch, Benjamin Long, Melissa M. Phillips, Jared Ragland, Kate Rimmer
Early in 2022 NIST embarked on a pilot project to produce digital calibration reports and digital certificates of analysis for reference materials. The goal of the project is to produce a few examples of digital reports and certificates for the purpose of

Energy Broadening of Neutron Depth Profiles by Thin Polyamide Films

September 7, 2022
Author(s)
Jamie Weaver, Anna Job, Kedar Manandhar, Ichiro Takeuchi, Robert Gregory Downing
A protective covering is often required for neutron depth profiling (NDP) measurements of sensitive materials (e.g., Li-ion batteries). Addition of this layer can increase NDP profile energy broadening and depth assignment uncertainty. This study evaluates

Improved Uranium Particle Analysis by SIMS using O3- Primary Ions

September 6, 2022
Author(s)
Evan Groopman, Todd Williamson, David S. Simons
We have investigated the use of negative molecular oxygen primary ion beams (i.e., O2- and O3-) to determine the benefits of using such beams for uranium particle SIMS analyses. Typically, O- is the most practical negative primary ion species for both age