151 citations · 535 across the 11 of their papers we have counts for
11 papers
Nanoscale torsional dissipation dilution for quantum experiments and precision measurement
Jon R. Pratt, Aman R. Agrawal, Charles A. Condos +3
We show that torsion resonators can experience massive dissipation dilution due to nanoscale strain, and draw a connection to a century-old theory from the torsion balance communit…
The Performance of the KIBB-g1 Tabletop Kibble Balance at NIST
Leon Chao, Frank Seifert, Darine Haddad +3
A tabletop-sized Kibble balance (KIBB-g1) designed to directly realize mass at the gram-level range with uncertainties on the order of parts in 10 has been developed at the Nat…
Measurement of the Planck constant at the National Institute of Standards and Technology from 2015 to 2017
D. Haddad, F. Seifert, L. S. Chao +5
Researchers at the National Institute of Standards and Technology(NIST) have measured the value of the Planck constant to be Js (relati…
Optomechanical reference accelerometer
Oliver Gerberding, Felipe Guzman Cervantes, John Melcher +2
We present an optomechanical accelerometer with high dynamic range, high bandwidth and read-out noise levels below 8 g/. The straightforward assembly and low…
First measurements of the flux integral with the NIST-4 watt balance
D. Haddad, F. Seifert, L. S. Chao +5
In early 2014, construction of a new watt balance, named NIST-4, has started at the National Institute of Standards and Technology (NIST). In a watt balance, the gravitational forc…
A determination of the local acceleration of gravity for the NIST-4 watt balance
E. J. Leaman, D. Haddad, F. Seifert +5
A new watt balance is being constructed at the National Institute of Standards and Technology (NIST) in preparation for the redefinition of the International System of Units and th…