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Superconducting material low-temperature microwave surface resistance testing device and method

A technology of microwave surface resistance and testing equipment, which is applied in the field of superconductivity, can solve problems such as rising operating frequency and inability to directly obtain microwave surface resistance, and achieve the effects of ensuring effectiveness, increasing test sensitivity, and improving measurement accuracy

Inactive Publication Date: 2019-07-30
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI +1
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Problems solved by technology

But when the sample diameter is small, the working frequency rises, and the microwave surface resistance of the sample at low frequency cannot be obtained directly

Method used

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  • Superconducting material low-temperature microwave surface resistance testing device and method
  • Superconducting material low-temperature microwave surface resistance testing device and method
  • Superconducting material low-temperature microwave surface resistance testing device and method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0026] Such as figure 2 As shown, the superconducting material superconducting material low-temperature microwave surface resistance testing device includes a cylindrical high-purity niobium cavity and sapphire filled in the high-purity niobium cavity. The bottom surface of the metal cavity 3 is provided with a sample hole. The central axis is located at the center of the bottom surface of the metal cavity 3 .

[0027] Such as image 3 As shown, the low-temperature microwave surface resistance test device for superconducting materials and superconducting materials provided by the present invention is installed on a low-temperature platform to perform superconducting tests. It should be noted that those skilled in the art are well aware that the test for the microwave surface resistance of superconducting materials must be performed in a low temper...

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Abstract

The invention discloses a superconducting material low-temperature microwave surface resistance multimode testing device and method. The device comprises a cylindrical metal cavity and a dielectric material filled in the metal cavity, wherein the bottom surface of the metal cavity is provided with a sample hole. The microwave surface resistance multimode testing method by using the testing devicecomprises the following steps: S1, placing high-purity niobium in the sample hole, and respectively measuring no-load quality factors in a TE 011 working mode and a TE 021 working mode; S2, placing asample to be detected in the sample hole, and respectively measuring the no-load quality factors in a TE 011 working mode and a TE 021 working mode; and S3, calculating the microwave surface resistance values of the sample to be detected in the TE 011 working mode and the TE 021 working mode according to the related formulas. The device and the method can directly perform nondestructive measurement on the microwave surface resistance of a small-size sample at low temperature at low frequency by using a plurality of modes of the filling medium cylindrical resonant cavity, and the measurement uncertainty is low.

Description

technical field [0001] The invention belongs to the technical field of superconducting, and in particular relates to a low-temperature microwave surface resistance (Rs) testing device and method of superconducting materials. Background technique [0002] Measuring the microwave surface resistance of superconducting materials can provide a quantitative reference for the loss of superconducting materials in the application process, so it has very important significance for its preparation, production and practical application. [0003] With the development of related technologies, superconducting niobium cavities are widely used in major accelerators to accelerate charged particles. Compared with normal temperature accelerating cavities, the loss of superconducting cavities at the same frequency is extremely low, and the loss of the cavity is proportional to the surface resistance. Proportional, that is, the surface resistance of the superconducting cavity is much smaller than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 董超沙鹏曾成张详振徐妙富
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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