Azial High-temperature RF SQUID Gradiometer System for Geomagnetic Prospecting

摘要：

In order to implement the geomagnetic prospecting in unshielded environment,an axial high-temperature radio frequency superconducting quantum interference device (RF SQUID) gradiometer system operating in liquid nitrogen at 77K is proposed in the paper. The gradiometer consists of two RF SQUID magnetometers,each with sensitivity better than 30 fT/Hz1/2. The gradiometer baseline is adjustable from 6 cm to 10 cm. The SQUID electronics we designed is automated and the working points are adjusted by the integrated microcontroller. The system maintains continuously two RF SQUID magnetometers in the fluxlocking condition. According to a long-term experiment,it is indicated that the gradiometer system developed by us demonstrated a good performance in the application of geomagnetic prospecting.

关键词： RF SQUID gradiometer SQUID electronics geomagnetic prospecting.

作者: Jing Zhao Jun Wang Guangda Liu

作者单位: College of Instrumentation and Electrical Engineering,Jilin University,No.938 Ximinzhu Street,Changchun,130061,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 704-707

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）