Calibration services

News and Updates

NIST Offers New Calibration Service for Wavemeters

December 23, 2024

For more than three decades, the National Institute of Standards and Technology (NIST) has calibrated the wavelengths of lasers used in industry, academia, and

Cassie Stoffer smiles while wearing safety glasses and standing next to a large metal tank with many pipes and wires attached to it.

Spotlight: Cassie Stoffer Helps Run Calibration and Measurement Services Related to Magnetic Resonance

August 27, 2024

If you ask NIST physicist Cassie Stoffer what she finds most exciting about science, it’s seeing what she learned in a textbook have real-world applications

A sunset. Text reads: "Radio Station WWVH. Reception Report, 15.0 MHz. Serial #23818. Date 4/7/2023."

Spotlight: Disseminating Time Signals Far and Wide With NIST’s Radio Stations

January 31, 2024

There are dedicated, enthusiastic people in this world who have made a cause (and hobby) out of saying, “I heard that.” NIST is keenly aware. We’re talking

Projects and Programs

Basic Metrology: High-Dose Dosimetry Uncertainty Tables

Ongoing

Gammacell™ Calibration Geometry Dose Rate Uncertainty Source Type A (%) Type B (%) Water Calorimetry in Vertical Beam 0.16 0.51 Gammacell/Pool Source Ratio Data 0.10 Pool/B036 Source Ratio Data 0.17 Geometry Correction Factor 0.11 Field Uniformity 0.01 Source Timer (irrad time > 8min) 0.20 Co-60

Ocean Color

Ongoing

The primary reference instrument for the United States and most international ocean-color sensors is the Marine Optical Buoy (MOBY), an automated radiometric system operated by NOAA and deployed about 20 km offshore from Lanai, Hawaii, where the atmospheric and water conditions support utilizing

Comparisons (Archive): International Comparison of Tc-99 Activity

Completed

Measurements by NIST on the solution were performed by three methods: viz., liquid scintillation (LS) standardizations (with 3H-standard efficiency tracing); with triple-to-double-coincidence ratio (TDCR) method; and with by 4ηβ(LS)-γ(NaI) live-timed anticoincidence (LTAC) measurements. Impurities

Calibration Services: New Calibration Facility for X-Ray Air Kerma

Ongoing

The NIST x-ray calibration facility is composed of a suite of rooms that includes the 11 m by 7 m calibration range, a dedicated equipment room, connected by custom shielding ports for communication with the x-ray tubes in the radiation area, an operator control center with a viewing window and

Publications

Comparison of Three Methods for Oscillating Flow Measurements in Cryocoolers

October 16, 2024

Author(s)

Ryan Snodgrass, Vincent Kotsubo, Joel Ullom

Measurement of oscillating mass flows is typically required for the study of cryocoolers and cryocooler compressors. Although many measurement techniques are

Traceable RF Power Metering Procedures With Thermoelectric Sensors

September 4, 2024

Author(s)

Zenn Roberts, Aaron Hagerstrom, Cole Gray, Angela Stelson, Vincent Neylon, Christian Long

The National Institute of Standards and Technology (NIST) maintains the United State's primary standards for traceable RF and mm-wave power measurements. These

NIST's Antenna Gain and Polarization Calibration Service Reinstatement

October 9, 2023

Author(s)

Josh Gordon, Benjamin Moser

After a five-year renovation of the National Institute of Standards and Technology (NIST) Boulder, CO, antenna measurement facility, the Antenna On-Axis Gain

Report from the Extreme Ultraviolet (EUV) Lithography Working Group Meeting: Current State, Needs, and Path Forward

August 22, 2023

Author(s)

Elizabeth Rasmussen, Boris Wilthan, Brian Simonds

This is the report of a hybrid working group meeting held on April 25, 2023, at the National Institute of Standards and Technology (NIST) in Boulder, CO. The