表面阻抗各向异性测量介质谐振器的概念与初步设计

Q3 Engineering

Acta IMEKO Pub Date : 2023-09-29 DOI:10.21014/actaimeko.v12i3.1447

Kostiantyn Torokhtii, Andrea Alimenti, Pablo Vidal García, Nicola Pompeo, Enrico Silva

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引用次数: 1

摘要

超导体的表面阻抗是相对于晶体轴在不同方向上的强(~ 10 T)静磁场的函数，从材料工程的角度来看，从基础物理实验中使用的设备的角度来看，这对于表征目的都是非常感兴趣的。不同的磁场方向通常是通过机械旋转磁铁获得的，其复杂性限制了可获得的最大磁场为几t。在这里，我们提出了一种特殊的概念验证设计，用于测量单元，其中磁场方向是固定的，而样品方向可以通过将其纳入单元的旋转部分来改变。因此，提出了测量单元的主要设计选择:一个圆柱形介质负载谐振器，用于测量典型尺寸平面样品的表面阻抗10×10mm2的表面摄动方法。这项初步工作的主要重点放在表面电阻(即表面阻抗的实部)可达到的灵敏度上。从材料工程和基础物理实验中使用的设备的角度来看，超导体的表面阻抗在相对于晶体轴的不同方向上的强(~ 10 T)静磁场的函数对于表征目的和基础物理实验中使用的设备具有很大的兴趣。不同的磁场方向通常是通过机械旋转磁铁获得的，其复杂性限制了可获得的最大磁场为几t。在这里，我们提出了一种特殊的概念验证设计，用于测量单元，其中磁场方向是固定的，而样品方向可以通过将其纳入单元的旋转部分来改变。因此，提出了测量单元的主要设计选择:一个圆柱形介质负载谐振器，用于测量典型尺寸为10 × 10 mm2的平面样品的表面阻抗的表面摄动方法。这项初步工作的主要重点放在表面电阻(即表面阻抗的实部)可达到的灵敏度上。

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Concept and preliminary design of dielectric resonator for anisotropic measurement of the surface impedance

The surface impedance of superconductors as a function of intense (∼ 10 T) static magnetic field at varying orientations with respect to the crystallographic axes is of large interest for both characterization purposes, in view of the material engineering, and from the point of view of devices to be used in fundamental physics experiments. A varying field orientation is customarily obtained with mechanically rotating magnets, whose complexity limits the attainable maximum fields to a few T. Here we propose a special proof of concept design for a measuring cell in which the magnetic field orientation is fixed, while the sample orientation can be changed through its incorporation in a rotating portion of the cell. The main design choices are thus proposed for the measuring cell: a cylindrical dielectric loaded resonator, to be used within the surface perturbation approach for the measurement of the surface impedance of flat samples with typical size 10×10mm2. The main focus in this preliminary work is put on the sensitivity attainable on the surface resistance, i.e. the real part of the surface impedance.The surface impedance of superconductors in function of intense (∼ 10 T) static magnetic field at varying orientations with respect to the crystallographic axes is of large interest for both characterization purposes, in view of the material engineering, and from the point of view of devices to be used in fundamental physics experiments. A varying field orientation is customarily obtained with mechanically rotating magnets, whose complexity limits the attainable maximum fields to a few T. Here we propose a special proof of concept design for a measuring cell in which the magnetic field orientation is fixed, while the sample orientation can be changed through its incorporation in a rotating portion of the cell. The main design choices are thus proposed for the measuring cell: a cylindrical dielectric loaded resonator, to be used within the surface perturbation approach for the measurement of the surface impedance of flat samples with typical size 10 × 10 mm2. The main focus in this preliminary work is put on the sensitivity attainable on the surface resistance, i.e. the real part of the surface impedance.

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来源期刊

Acta IMEKO Engineering-Mechanical Engineering

CiteScore

2.50

自引率

0.00%

发文量

期刊介绍： The main goal of this journal is the enhancement of academic activities of IMEKO and a wider dissemination of scientific output from IMEKO TC events. High-quality papers presented at IMEKO conferences, workshops or congresses are seleted by the event organizers and the authors are invited to publish an enhanced version of their paper in this journal. The journal also publishes scientific articles on measurement and instrumentation not related to an IMEKO event.