Terahertz ultralow-temperature superconducting detection system and reading circuit thereof

Abstract

The invention discloses a terahertz ultralow temperature superconducting detection system and a reading circuit thereof. The system comprises a first cavity and a second cavity located in the first cavity, the first cavity is a room temperature cavity, the second cavity is a sub-Kelvin cavity, a plurality of refrigerators are arranged in the first cavity, used for refrigerating the second cavity to reach a sub-Kelvin working temperature. The first cavity is provided with a working window for terahertz signal transmission, and the second cavity is internally provided with a superconducting dynamic inductor array, a low-temperature attenuator and a low-temperature amplifier, and the low-temperature attenuator and the low-temperature amplifier are electrically connected with the superconducting dynamic inductor array. The superconducting dynamic inductor array can work in a stable low Kelvin temperature range, the system noise is greatly reduced, the receiving sleep degree of the dynamic inductor is improved, and meanwhile the difficulty and the operation cost of temperature control and maintenance of a low-temperature system are greatly reduced; through a frequency reuse mode, the reading circuit supports signal reading of the multi-pixel superconducting dynamic inductor.

Description

technical field [0001] The invention belongs to the technical field of terahertz detection, and in particular relates to a terahertz ultra-low temperature superconducting detection system and a reading circuit thereof, which can be applied to the fields of active and passive terahertz security inspection, space and aerospace cosmic ray observation, medical imaging diagnosis and the like. Background technique [0002] Terahertz refers to electromagnetic waves with a frequency in the range of 100GHz-10THz. Terahertz radiation has the ability to penetrate most insulators, such as clothing, ceramics, plastics, paper and cardboard, etc., and metal substances have the ability to block them. Generate shadow conformations, these characteristics have good practical applications for using terahertz waves to detect hidden dangerous objects in human clothing or on the skin, such as human body security inspection systems to detect dangerous objects hidden inside clothing. The terahertz f...

AI Technical Summary

Problems solved by technology

For example, transition boundary sensors and superconducting quantum interferometers are used as readout systems. However, such systems have very complex manufacturing process requirements for superconducting devices and quantum readout circuits, and the readout circuits are huge. They are special research and development products for scientific research. Low yield rate and high cost

Images