A tunable vacuum-gap cryogenic coaxial capacitor

Author

Overney, Frédéric ; Jeanneret, Blaise ; Furlan, Miha

Author_Institution

Swiss Federal Office of Metrol., Bern, Switzerland

Volume

49

Issue

6

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1326

Lastpage

1330

Abstract

In order to realize a quantum capacitance standard, a vacuum-gap cryogenic capacitor based on a coaxial design has been developed. A tuning mechanism allows adjustment of the room temperature value of the capacitance to obtain the value of 1 pF at cryogenic temperature. At 10 mK, the difference between the measured value and the target value is less than 30×10^-6. In this paper, the capacitor and its tuning mechanism are described in detail. The variation of the capacitance during the vacuum and temperature cycles and its stability at 10 mK are also investigated

Keywords

capacitance measurement; capacitors; electrometers; measurement standards; quantum interference devices; tuning; 1 pF; 10 mK; coaxial design; low temperature stability; mechanical stability; quantum capacitance standard; single electron tunnelling; temperature cycles; tuning mechanism; vacuum cycles; vacuum-gap cryogenic capacitor; Bridge circuits; Capacitors; Coaxial components; Cryogenics; Electrons; Elementary particle vacuum; Quantum capacitance; Stability; Standards development; Temperature;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.893278

Filename

893278