Intelligent testing device for high-temperature superconducting terahertz radiation source based on different bias conditions

Abstract

The invention discloses an intelligent testing device for a high-temperature superconducting terahertz radiation source based on different bias conditions. The device comprises a test board, a low-temperature refrigeration system, an optical path transmission system and a signal acquisition and storage system are fixedly mounted on the upper surface of the test board, and a sealed shell is fixedlymounted on the left side of the upper surface of the test board. The low-temperature refrigerating system comprises a Stirling refrigerator, a cooling cavity is formed in the output end of the Stirling refrigerator, and a liquid nitrogen cooling tank is installed on the right side of the cooling cavity. According to the intelligent testing device for the high-temperature superconducting terahertzradiation source based on different bias conditions, the improved Stirling refrigerator and the liquid nitrogen cooling tank are used in cooperation, and the radiation source is installed in the cooling cavity of the Stirling refrigerator through a red copper supporting piece; and a computer controls a liquid nitrogen flow switch of the liquid nitrogen cooling tank through the self-made temperature controller in the laboratory so as to control the flow of liquid nitrogen and the cooling efficiency of the Stirling refrigerator, and the temperature in the cooling cavity is accurately controlled.

Description

technical field [0001] The invention relates to the field of test devices, in particular to the field of an intelligent test device for a high-temperature superconducting terahertz radiation source based on different bias conditions. Background technique [0002] As we all know, terahertz waves include electromagnetic waves with a frequency of 0.1 to 10 THz, and this term applies to the range between the high-frequency edge (300 GHz) of the millimeter-wave band of electromagnetic radiation and the low-frequency far-infrared spectral band edge (3000 GHz). Frequency, the radiation of the corresponding wavelength ranges from 0.03mm to 3mm in this frequency band. During the research on the high-temperature superconducting terahertz radiation source, it was found that the radiation performance of the sample was significantly affected by the DC bias. Under different bias conditions Under different conditions, the electrical transport, frequency linewidth, radiation stability and o...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a high-temperature superconducting terahertz radiation source intelligent testing device based on different bias conditions, which can effectively solve the problems in the background technology: first, the Stirling refrigerator is provided with a cold head frame, and the radiation If the cooling source is placed under the cold head frame of the Stirling refrigerator, cooling may lead to unbalanced cooling on the surface of the radiation source, resulting in poor cooling effect. Secondly, the cooling method of the Stirling refrigerator is relatively simple and cannot be quickly Accurately adjust the refrigeration temperature. Finally, using a Stirling refrigerator to spray liquid helium to the radiation source may cause the terahertz wave emitted by the radiation source to be scattered by the liquid helium molecules, thus affecting the power of the terahertz wave.

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