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在联邦通信委员会（FCC）研究框架下厚REBCO涂层导体的高频响应

High frequency response of thick REBCO coated conductors in the framework of the FCC study.

作者信息

Romanov Artur, Krkotić Patrick, Telles Guilherme, O'Callaghan Joan, Pont Montse, Perez Francis, Granados Xavier, Calatroni Sergio, Puig Teresa, Gutierrez Joffre

机构信息

Institut de Ciència de Materials de Barcelona, C.S.I.C., Campus U.A. Barcelona, 08193, Bellaterra, Catalonia, Spain.

ALBA Synchrotron-CELLS, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallés, Barcelona, Spain.

出版信息

Sci Rep. 2020 Jul 23;10(1):12325. doi: 10.1038/s41598-020-69004-z.

DOI:10.1038/s41598-020-69004-z
PMID:32704019
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7378233/
Abstract

A thorough microwave response study of high temperature superconductors, considered as an alternative beam screen coating, has become integral in the design decisions for CERN's future research infrastructure. Here, we present the surface resistance [Formula: see text] of various [Formula: see text] (RE = rare earth) coated conductors available in large scale as a function of magnetic field in a broad temperature range measured by a Hakki-Coleman type resonator with resonant frequency [Formula: see text]. Analysis of the high frequency dissipation supported by DC transport characterization reveals the vortex dynamics in thick [Formula: see text] films. Determined microscopic vortex parameters span over a wide range of magnitudes and reflect the relevance of the superconducting layer's microstructure. We demonstrate that the depinning frequencies [Formula: see text] surpass [Formula: see text], which confirms the operation in high performing, low dissipation pinning regime at measurement conditions. Surface impedance extrapolation to FCC-hh conditions points towards a significant outperformance of copper by coated conductors in terms of surface resistance. The surface resistance margins would open up potential ways for a more efficient frontier circular collider.

摘要

作为一种替代束流屏涂层，对高温超导体进行全面的微波响应研究已成为欧洲核子研究组织（CERN）未来研究基础设施设计决策中不可或缺的一部分。在此，我们展示了通过具有共振频率[公式：见原文]的哈基 - 科尔曼型谐振器在宽温度范围内测量的各种[公式：见原文]（RE = 稀土）涂层导体的表面电阻[公式：见原文]随磁场的变化情况。通过直流输运特性对高频耗散进行分析，揭示了厚[公式：见原文]薄膜中的涡旋动力学。确定的微观涡旋参数跨越了广泛的量级范围，反映了超导层微观结构的相关性。我们证明，去钉扎频率[公式：见原文]超过[公式：见原文]，这证实了在测量条件下处于高性能、低耗散钉扎状态下的运行情况。将表面阻抗外推到FCC - hh条件表明，涂层导体在表面电阻方面明显优于铜。表面电阻余量将为更高效的前沿环形对撞机开辟潜在途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/48da85a6553b/41598_2020_69004_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/d63feca34484/41598_2020_69004_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/1e3dcc0b8c9a/41598_2020_69004_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/51aa9a31bdc5/41598_2020_69004_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/19168a9b1c59/41598_2020_69004_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/f3ac99ea127b/41598_2020_69004_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/347abd910ba0/41598_2020_69004_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/faf32600eac1/41598_2020_69004_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/48da85a6553b/41598_2020_69004_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/d63feca34484/41598_2020_69004_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/1e3dcc0b8c9a/41598_2020_69004_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/51aa9a31bdc5/41598_2020_69004_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/19168a9b1c59/41598_2020_69004_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/f3ac99ea127b/41598_2020_69004_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/347abd910ba0/41598_2020_69004_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/faf32600eac1/41598_2020_69004_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b435/7378233/48da85a6553b/41598_2020_69004_Fig8_HTML.jpg

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