Radio Frequency Surface Impedance Characterization System for Superconducting Samples at 7.5 GHz [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 530 Physics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2011
• Mô tả vật lý: Size: 6104 (3 pages) : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268500
• Chủ đề: 1. 36 materials science; 2. 47 other instrumentation; 3. Impedance; 4. Magnetic flux; 5. Superconductors

Tóm tắt

A radio frequency (RF) surface impedance characterization (SIC) system that uses a sapphire-loaded Nb cavity operating at 7.5 GHz has been fabricated to measure the RF surface impedance of flat superconducting samples. Currently, the SIC system can make direct calorimetric surface impedance measurements in the central 0.8 cm2 area of 5 cm diameter disk samples in a temperature range from 2 to 20 K, exposed to a magnetic flux density of up to 14 mT. As an application, we present the measurement results for a bulk Nb sample.