High-temperature superconducting quantum voltage standard system and regulation and control method

Abstract

The invention discloses a high-temperature superconducting quantum voltage standard system and a regulation and control method, and relates to the technical field of quantum voltage. Comprising a liquid nitrogen low-temperature tank, a measuring rod, a Fabry-Perot resonant cavity, an adjusting mechanism, a microwave signal source, a measuring unit and an upper computer, and the liquid nitrogen low-temperature tank provides a 77K low-temperature working environment; one end of the measuring rod bears the Fabry-Perot resonant cavity and is placed in the liquid nitrogen low-temperature tank, the Fabry-Perot resonant cavity is configured to excite a resonant mode in a frequency band of 70-75GHz, and the plane mirror is provided with a high-temperature superconductive Josephson junction array chip. The arrangement direction of the chip junction array is configured to be parallel to the polarization direction of an electric field in the resonant cavity; the adjusting mechanism is used for adjusting the relative position and posture of the chip and the spherical reflector so that the electric field polarization direction can be parallel to the junction array direction. According to the invention, the Josephson junction array realizes stable and accurate quantum voltage output in a high-temperature superconductive liquid nitrogen temperature zone environment, and the system complexity is reduced at the same time.

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