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Search Publications by: John R. Stoup (Fed)

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Displaying 1 - 25 of 40

Non-nulling Protocols for Fast, Accurate, 3-D Velocity Measurements in Stacks

July 28, 2023
Author(s)
Iosif Isaakovich Shinder, Aaron Johnson, James Filla, Vladimir B. Khromchenko, Michael R. Moldover, Joey Boyd, John D. Wright, John R. Stoup
We present protocols for making fast, accurate, 3-D velocity measurements in the stacks of coal-fired power plants. The measurements are traceable to internationally-recognized standards; therefore, they provide a rigorous basis for measuring and/or

Physical Models and Dimensional Traceability of 2.4 mm Coaxial Airline Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters

July 6, 2023
Author(s)
Jeffrey Jargon, Dylan Williams, Angela Stelson, Chris Long, Aaron Hagerstrom, John R. Stoup, Eric S. Stanfield
In this report, we document the models and dimensional traceability of our 2.4 mm coaxial airline standards for performing multiline thru-reflect-line calibrations up to 50 GHz using vector network analyzers. We identify the equations used in our models of

D-to-A_eff converter

August 1, 2022
Author(s)
Patrick Egan, Eric S. Stanfield, John R. Stoup
Recent developments in diameter metrology at NIST have enabled the dimensional characterization of piston-cylinder assemblies (PCA) with unprecedented precision. For the newest generation of PCA, standard uncertainty on measurement of outer diameter is 12

CCM Key Comparison in the Pressure Range 0.05 MPa to 1 MPa (Gas Medium, Gauge Mode) - Phase A1: Dimensional Measurements and Calculation of Effective Area

October 12, 2021
Author(s)
G F. Molinar, B Rebaglia, A Sacconi, J C. Legras, G P. Vailleau, James W. Schmidt, John R. Stoup, D R. Flack, Waldimir Sabuga, O Jusko
The results obtained by five laboratories in the determination of the effective areas of two gas-operated 10 cm 2 piston-cylinder assemblies from dimensional measurements carried out as part, called phase A1, of a key comparison in the pressure range 0.05

Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters

August 10, 2020
Author(s)
Jeffrey A. Jargon, Dylan F. Williams, Angela C. Stelson, Christian J. Long, Aaron M. Hagerstrom, Paul D. Hale, John R. Stoup, Eric S. Stanfield, Wei Ren
In this report, we document the models and dimensional traceability of our WR15 rectangular waveguide standards for performing multiline thru-reflect-line calibrations from 50 GHz to 75 GHz using vector network analyzers. We identify the equations used in

Sphere Diameter Interferometry with Nanometer Uncertainty

February 20, 2020
Author(s)
Eric S. Stanfield, John R. Stoup, Michael P. Braine, Theodore D. Doiron
In this paper we present both the design details and uncertainty budget for a National Institute of Standards and Technology (NIST)-developed high-accuracy Fizeau-type interferometer specifically adapted to measurement sphere diameter. To do this, we

Measuring Step Gauges Using the NIST M48 CMM

April 1, 2011
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new Advanced Measurement

Micro-feature dimensional and form measurements with the NIST fiber probe on a CMM

July 30, 2010
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup, Chittaranjan Sahay
The NIST fiber probe is a Coordinate Measuring Machine (CMM) probing system intended for diameter and form measurement of micro features and small holes. This Moore M48 CMM at NIST can measure holes down to 500 um diameter with the Movamatic probe; the

Measuring Step Gauges Using the NIST M48 CMM

July 25, 2010
Author(s)
John R. Stoup, Bryon S. Faust
The Moore M48 coordinate measuring machine (CMM) has provided NIST with unique and very flexible measurement capabilities for many years. The machine’s state of the art performance was further improved following the move of the machine into the new

Roundness Measurements Using the NIST Fiber Probe

January 1, 2007
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup
We have described a fiber probe for dimensional measurement of micro-holes in the 2004 and 2006 ASPE annual meetings. In this abstract, we describe the adaptation of this probe for measuring roundness of tiny holes and knife edge apertures. In its current

Early Results From the NIST M48 CMM in the New AML Facility

March 3, 2006
Author(s)
John R. Stoup, Bryon S. Faust, Theodore D. Doiron
The Advanced Measurement Laboratory at NIST in Gaithersburg has already provided real, measurable improvement in some dimensional metrology measurement processes at NIST, most notably in the performance of the NIST Moore M48 coordinate measuring machine1

Enhanced Capabilities of the NIST Fiber Probe for Microfeature Metrology

January 1, 2006
Author(s)
Bala Muralikrishnan, Jack A. Stone Jr., John R. Stoup
We have previously reported work in the area of fiber probe development at NIST for micro feature measurement. This probe, which we refer to as the Fiber Deflection Probe, functions by optically imaging the stem from two orthogonal directions a few

Fiber Deflection Probe for Small Hole Metrology

January 1, 2006
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup
This paper presents the development of a new probing method for Coordinate Measuring Machines (CMM) to inspect diameter and form of small holes. The technique, referred to as fiber deflection probing, can be used for holes of approximately 100 mm nominal

Fiber Deflection Probe Uncertainty Analysis for Micro Holes

January 1, 2006
Author(s)
Bala Muralikrishnan, Jack A. Stone Jr., John R. Stoup
We have recently reported on a new probe, the Fiber Deflection Probe (FDP), for diameter and form measurement of large aspect ratio micro-holes (100 um nominal diameter, 5 mm deep). In this paper, we briefly review the measurement principle of the FDP

Form-Profiling of Optics Using the Geometry Measuring Machine and NIST M-48 CMM

January 1, 2006
Author(s)
Nadia Machkour-Deshayes, John R. Stoup, John Lu, Johannes A. Soons, Ulf Griesmann, Robert S. Polvani
We are developing an instrument, the Geometry Measuring Machine (GEMM), to measure the profile errors of aspheric and free form optical surfaces, which require measurement uncertainties near 1nm. Using GEMM, an optical profile is reconstructed from a set

A Fiber Probe for CMM Measurements of Small Features

August 1, 2005
Author(s)
Jack A. Stone Jr., Balasubramanian Muralikrishnan, John R. Stoup
We report on performance of a new form of fiber probe, which can be used in conjunction with a coordinate measuring machine (CMM) for microfeature measurement. The probe stylus is a glass fiber with a small ball (?75 ?m diameter) glued to the end. When the

Measuring Internal Geometry of Fiber Ferrules

May 1, 2005
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup
The focus of this paper is on the metrology of microstructures. Traditional Coordinate Measuring Machines (CMM) are limited to measuring holes of 300 m diameter. Smaller features and holes require thinner styli & novel probing technologies that can