SBIR Phase I: Scanning Wire Magnetometer for Nondestructive Evaluation for High-Temperature Superconducting Wire

SBIR 第一阶段：用于高温超导线材无损评估的扫描线磁力计

• 批准号: 9661170
• 负责人: Sankaran Kumar
• 金额: $ 7.48万
• 依托单位: Quantum Magnetics, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9661170&HistoricalAwards=false
• 关键词: SBIR; Phase; Scanning; Wire; Magnetometer

This Small Business Innovation Research Phase I project will develop a new instrument for the nondestructive evaluation (NDE) of high-temperature superconducting (HTS) wires. A major obstacle to commercial development of HTS applications is the inability to manufacture long lengths of wire reliably. One conventional method to test long lengths of wire is to cut pieces from their ends and perform critical current measurements. This leaves most of the wire untested. The four-point resistivity method requires the attachment and subsequent removal of contacts, which risks damaging the wire and provides poor spatial resolution of defects. This project will develop the Scanning WIre Magnetometer (SWIM) to scan the entire wire length's ac magnetic susceptibility continuously, measuring critical current density noninvasively and with high spatial resolution. Operated as an eddy current instrument above the superconducting transition temperature, SWIM also evaluates the physical integrity of the wire's silver cladding. In Phase I, the project will demonstrate feasibility of scanning wire magnetometry using HTS wire samples provided by two project collaborators, Intermagnetics General Corp. and the State University of New York at Buffalo. In Phase II, an automated prototype will be fabricated for testing at an HTS wire fabrication facility. This specific NDE market aims primarily to facilitate the cost-effective production of HTS wire, tape and thin film materials, with a secondary application to low-temperature superconducting wire production. A direct commercial market for the SWIM of the order of several million dollars per year is expected, but has the potential to greatly accelerate the commercial development of HTS devices and thus indirectly to generate much larger markets.

这个小型企业创新研究第一阶段项目将开发一种用于高温超导(HTS)线材无损评估(NDE)的新仪器。HTS应用商业化发展的一个主要障碍是无法可靠地制造长线。测试长导线的一种传统方法是从导线的末端切下几块，然后进行临界电流测量。这使得大部分电线都没有经过测试。四点电阻率法需要连接和随后移除触点，这有损坏导线的风险，并且提供了较差的缺陷空间分辨率。该项目将开发扫描线磁强计(SWIM)，以连续扫描整个导线长度的交流磁化率，非侵入性地测量临界电流密度，并具有高空间分辨率。作为一种高于超导转变温度的涡流仪器，SWIFE还可以评估导线银层的物理完整性。在第一阶段，该项目将展示使用由两个项目合作者InterMagics General Corp.和纽约州立大学布法罗分校提供的HTS线材样品进行扫描线磁测量的可行性。在第二阶段，将制造一个自动化原型，以便在高温超导线材制造设施进行测试。这一特殊的无损检测市场主要旨在促进具有成本效益的高温超导线材、带材和薄膜材料的生产，并辅之以低温超导线材的生产。预计每年将有数百万美元的直接商业市场，但有可能极大地加速HTS设备的商业发展，从而间接产生更大的市场。