高温RF-SOUID磁力仪及其在大地电磁测深中的应用 |
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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。
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关 键 词: | 高温RF-SQUID磁力仪,YBCO超导体,大地电磁测深,钉扎磁通 |
HTc RF-SQUID MAGNETOMETER AND ITS APPLICATION TO MAGNETOTELLURIC SOUNDING |
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Authors: | Li Wenquan Qiu Shangyong Fang Shuju Ren Guangqun Zuo Zhancai |
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Institution: | Dep.of Instrument Device |
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Abstract: | 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 |
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Keywords: | HTc RF-SQUID magnetometer YBCO superconductor magnetortelluric sounding pinned magnetic flux |
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