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arXiv 1902.04551physics.ins-dethep-ex
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用于强磁场中暗物质轴子研究的高品质因数高温超导微波腔的研制

High Quality Factor High-Temperature Superconducting Microwave Cavity Development for the Dark Matter Axion Search in a Strong Magnetic Field

Danho Ahn, Dojun Youm, Ohjoon Kwon, Woohyun Chung, Yannis K. Semertzidis

摘要:

我们展示了一个超导(SC)微波(MW)腔,可以通过在高直流磁场中保持超导性来加速暗物质的搜索。为了防止高温超导体在磁场作用下失效,我们采用了相变温度为90 K的高温超导体钇钡铜氧化物(YBCO)。由于在金属微波腔体上直接沉积高温超导薄膜是非常困难的,我们使用了商业化的高温超导带材,即涂覆有高温超导薄膜的柔性金属带材。我们制作的谐振腔($f_{TM010}$ ~ 6.89 GHz)的三分之一的内壁覆盖YBCO磁带和测量的品质因数(Q因子)在4K温度下,从0到8特斯拉的直流磁场。即使在8特斯拉的磁场中,也没有显著的品质(Q)因子下降,并且超导性很好地保持。这意味着高温超导微波谐振腔在强磁场下具有良好的轴子探测性能的可能性。

英文摘要:

We demonstrate a superconducting (SC) microwave (mw) cavity that can accelerate the dark matter search by maintaining superconductivity in a high DC magnetic field. We used high-temperature superconductor (HTSC) yttrium barium copper oxide (YBCO) with a phase transition temperature of 90K to prevent SC failure by the magnetic field. Since the direct deposition of HTSC film on the metallic mw cavity is very difficult, we used the commercial HTSC tapes which are flexible metallic tapes coated with HTSC thin films. We fabricated resonating cavity ($f_{TM010}$ ~ 6.89 GHz) with a third of the inner wall covered by YBCO tapes and measured the quality factor (Q factor) at 4K temperature, varying the DC magnetic field from 0 to 8 tesla. There was no significant quality (Q) factor drop and the superconductivity was well maintained even in 8 tesla magnetic field. This implies the possibility of good performance of HTSC mw resonant cavity under a strong magnetic field for axion detection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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