Work

A Bi-Polar Current Source With High Short-Term Stability for Tsinghua Tabletop Kibble Balance

Year: 2024

Type: article

Abstract: A high-precision current source, capable of supporting weighing measurements with a relative uncertainty at the$10^{-9}$level, is essential for Kibble balance experiments. However, most current sources utilized in Kibble balances to date are homemade and not commercially available. In this article, we introduce a digital-feedback two-stage current source (DTCS) designed for the Tsinghua tabletop Kibble balance, relying solely on commercially available sources and voltmeters. A high-resolution, small-range current source is employed to digitally compensate for current output fluctuations from a large-range current source. Experimental tests show that the proposal can offer an easy realization of a current source with nA/A stability to support Kibble balance measurements.

Source: IEEE Transactions on Instrumentation and Measurement

DOI: 10.1109/tim.2024.3481546

Authors: Kang Ma, Xiaohu Liu, Wei Zhao, Songling Huang, Shisong Li

Institution: Tsinghua University

Language: English

Topic: Scientific Measurement and Uncertainty Evaluation

Subfield: Instrumentation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Institute of Metrology, China, National Key Research and Development Program of China

Awards: G2816316378, G4820270495, G913515397