Stambaugh, C.
(2015),
THE CONTROL SYSTEM FOR THE MAGNETIC SUSPENSION OF THE NIST VACUUM-TO-AIR MASS DISSEMINATION SYSTEM, Proceedings of Asia-Pacific Symposium on Measurement of Mass, Force & Torque , SEOUL, KR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919530 (Accessed April 25, 2026)
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THE CONTROL SYSTEM FOR THE MAGNETIC SUSPENSION OF THE NIST VACUUM-TO-AIR MASS DISSEMINATION SYSTEM
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Abstract
High precision mass comparisons are typically performed such that both masses are measured under nearly identical conditions. However, there are situations where an artifact needs to be calibrated against a standard kept under different conditions. For example, the new realization of the kilogram will be carried out in vacuum but the majority of calibrations services are performed at atmospheric pressure. At the National Institute of Standards and Technology we have developed an apparatus to perform direct mass comparison under such a condition using a magnetic suspension system. The stability of the magnetically suspended portion of the system plays a large role in the overall uncertainty of a measurement. Here we describe the control system for the magnetic suspension and the improvements we have made to increase its stability.Proceedings Title
Proceedings of Asia-Pacific Symposium on Measurement of Mass, Force & Torque
Conference Dates
October 27-30, 2015
Conference Location
SEOUL, KR
Pub Type
Conferences
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Keywords
MASS, MAGNETIC SUSPENSION, KILOGRAM, PLANCK, CONTROL, PID
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Created November 1, 2015, Updated April 21, 2026