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arXiv 2302.06753cond-mat.supr-con
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REBCO导体的ab平面倾斜角

ab-plane tilt angles in REBCO conductors

Jun Lu, Yan Xin, Yifei Zhang, Hongyu Bai

AI总结:

本研究针对商用REBCO带材ab平面实际存在横向微倾斜的问题,采用XRD室温测量SuperPower公司多款导体的倾斜角,结合TEM探究倾斜成因,为精准测Ic(θ)及磁体线圈设计提供依据。

摘要:

REBCO带材的临界电流(Ic)随磁场方向呈现强烈的各向异性。通常情况下,当REBCO晶体的ab平面与磁场平行时,Ic达到最大值。在商用REBCO带材中,人们普遍假设ab平面与带材平面重合。但实际上,ab平面虽接近带材平面,却在横向方向上存在轻微倾斜。为准确测量作为场角θ(定义为ab平面与磁场方向之间的夹角)函数的Ic,并基于测得的Ic(角度)设计和制造REBCO磁体线圈,测量该倾斜角十分重要。在本研究中,我们使用X射线衍射(XRD)在室温下测量了大量由SuperPower Inc.生产的REBCO导体的倾斜角。我们还采用透射电子显微镜(TEM)探究了该倾斜的成因。文中给出了测量数据,并讨论了测量不确定度。

英文摘要:

Critical current (Ic) of REBCO tapes is strongly aniso-tropic with respect to the orientation of the magnetic field. Usually, Ic is at maximum when the ab-plane of the REBCO crystal is parallel to the magnetic field. In commercial REBCO tapes, it is commonly assumed that the ab-plane is coincide with the tape plane. While in fact, the ab-plane is near but slightly tilted from the tape plane in the transverse direction. To accurately measure Ic as a function of the field angle θ , which is defined as the angle between ab-plane and the magnetic field direction, and to design and fabricate REBCO mag-net coils based on the measured Ic(angle), it is important to measure the tilt angle. In this work, we used x-ray diffraction (XRD) to measure the tilt angles at room temperature for a large number of REBCO conductors made by SuperPower Inc. Transmission electron mi-croscopy (TEM) was also used to investigate the origin of this tilt. The measured data are presented, and the measurement uncer-tainty is discussed.

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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