摘要
嗓声失锁和钉扎磁通干扰是影响锁定式高温ＲＦ－ＳＯＵＩＤ磁力仪在野外长时间稳定工作的两大难题。由于采用了钉扎磁通消除器，并在高温ＲＦ－ＳＱＵＩＤ测控系统的设计中采取了一系列的技术措施，使我们选用国产ＹＢＣＯ块材ＲＦ－ＳＱＵＩＤ研制出的锁定式高温ＲＦ－ＳＯＵＩＤ磁力仪，可以在野外长达１４０００ｓ的测量期间内稳定工作不出现失锁和量子磁通跳变。在地层结构巳知的测点上，用这台高温ＲＦ－ＳＱＵＩＤ磁力仪得到的大地视电阻率曲线与西德ＫＩＭ－７８０２感应探头所得到的曲线几乎完全相同。
Two major difficulties,that is,the noise-caused out-of-locks and the pinned magnetic flux influences have to be solved before a flux-locked HTc RF-SQUIDmagnetometer can stably operate long hours in the field.A flux-locked HTc RF- SOUID magnetometer built with China- made bulk YBCO RF-SQUIDS can stablywork as long as 14000 seconds in the field enviroments without any out-Of-locks andmagnetic flux quantum jumps ,because a pinned magnetic flux suppressor for the HTc RF-SQUID and a series of techniques for the measurement and control system of themagnetometer have been used.At a measurement location of known earth strata,thecalculated resistance-ratio-curves based on the data measured with the HTc RF-SOUID magnetometer have proved nearly same as those curves given by the KIM-7802electromagnetic induction probe for magnetotelluric sounding
基金
国家教委优秀青年教师基金
关键词
磁力仪
电磁测深
电阻率
HTc RF-SQUID,magnetometer,YBCO superconductor,magnetortelluric sounding,pinned magnetic flux
