Table-Top Primary Mass and Torque Realization at NIST: The Kibble Principle Coming to a Lab Near You
- Start Date : 10 February, 2027
- Start Time : 8:00am
- End Date : 10 February, 2027
- End Time : 5:00pm
- Address : Salon VI, N Tower
No Schedule
Abstract
The 2019 redefinition of the International System of Units has opened the door to a new era of mass and torque realization. The definition of the kilogram is no longer a platinum-iridium cylinder locked away in a vault in France but is instead tied to the precisely defined value of Planck’s constant. This extended seminar will discuss how the Planck constant gives us the definition of the kilogram, ramifications of the redefinition, and how this new definition can be used to potentially revolutionize mass and torque metrology using the Kibble principle. Two projects from the National Institute of Standards and Technology; the tabletop Kibble balance project (Kibb-g2) and the Electronic NIST Torque Realizer (ENTR) will be used as examples of the leading edge of Kibble-based realization of mass and torque metrology, offering a window into the future of mass and torque standard dissemination.
Zane Comden
Zane Comden is a researcher at the National Institute of Standards and Technology and member of the Fundamental Electrical Measurements Group, presently pursuing his master’s in applied physics at Johns Hopkins University. For the past six years, his research has focused on application of the Kibble principle to research, design, and create table-top devices which utilize electrical standards to realize mass and torque with a focus on use within primary and secondary standards laboratories.
Chandra B. Shahi
Chandra B. Shahi is a research scientist at the National Institute of Standards and Technology (NIST), specializing in precision metrology and electromechanical system design. He is a key member of the design and development team for the Electronic NIST Torque Realizer Version 3 (ENTR3), an SI-traceable torque realization system with a measurement range up to 340 N·m that supports national metrology and Department of Defense applications. He also has experience performing high-precision mass calibrations in NIST’s Mass and Force Group. His earlier research included neutron interferometry, boron-10–based neutron detectors, and advanced experimental instrumentation. He earned his Ph.D. in Physics from Tulane University in 2016 and has co-authored several peer-reviewed publications in metrology and experimental physics.