Detecting magnetic field is of great importance for many applications,such as magnetoencephalography and underground prospecting.There have been many magnetometers being widely used since the age of Hall magnetometer....Detecting magnetic field is of great importance for many applications,such as magnetoencephalography and underground prospecting.There have been many magnetometers being widely used since the age of Hall magnetometer.One of the magnetometers,the superconducting quantum interference device,is capable of measuring femtotesla magnetic fields at cryogenic temperature.However,a solid-state magnetometer with femtotesla sensitivity under ambient conditions remains elusive.Here we present a hybrid magnetometer based on the ensemble nitrogen-vacancy centers in diamond with the sensitivity of(195±60)fT/Hz^(1/2)under ambient conditions,which can be further advanced to 11 fT/Hz^(1/2)at 100 Hz with cutting-edge fabrication technologies.Our method will find potential applications in biomagnetism and geomagnetism.展开更多
针对地球物理勘探中高精度磁场测量以及远距离数据同步的需求,本文基于低温超导量子干涉仪和图形化系统开发平台构建了一种可通过GPS同步的新型磁力仪,并可采用简便的直读方式进行磁场测量。首先介绍了新型低温超导磁力仪的工作原理,并...针对地球物理勘探中高精度磁场测量以及远距离数据同步的需求,本文基于低温超导量子干涉仪和图形化系统开发平台构建了一种可通过GPS同步的新型磁力仪,并可采用简便的直读方式进行磁场测量。首先介绍了新型低温超导磁力仪的工作原理,并重点阐述了由其程控直读电路以及软硬件设计方案;然后在分析影响超导磁力仪数据同步因素的基础上,给出了GPS同步实现及其同步精度标定的方法;最后在良好的磁屏蔽环境中对超导磁力仪的性能以及电磁兼容进行了评估,并对影响其同步的相关因素进行了测试和标定,试验表明传感器的本底噪声约为6 f T/Hz@1 kHz,数据同步精度可达1 ms,满足实用要求。展开更多
基金supported by the National Key R&D Program of China(2018YFA0306600 and 2016YFB0501603)the National Natural Science Foundation of China(11761131011)+2 种基金the Chinese Academy of Sciences(GJJSTD20170001,QYZDY-SSW-SLH004 and QYZDBSSW-SLH005)Anhui Initiative in Quantum Information Technologies(AHY050000)the Youth Innovation Promotion Association of Chinese Academy of Sciences for the support。
文摘Detecting magnetic field is of great importance for many applications,such as magnetoencephalography and underground prospecting.There have been many magnetometers being widely used since the age of Hall magnetometer.One of the magnetometers,the superconducting quantum interference device,is capable of measuring femtotesla magnetic fields at cryogenic temperature.However,a solid-state magnetometer with femtotesla sensitivity under ambient conditions remains elusive.Here we present a hybrid magnetometer based on the ensemble nitrogen-vacancy centers in diamond with the sensitivity of(195±60)fT/Hz^(1/2)under ambient conditions,which can be further advanced to 11 fT/Hz^(1/2)at 100 Hz with cutting-edge fabrication technologies.Our method will find potential applications in biomagnetism and geomagnetism.
文摘针对地球物理勘探中高精度磁场测量以及远距离数据同步的需求,本文基于低温超导量子干涉仪和图形化系统开发平台构建了一种可通过GPS同步的新型磁力仪,并可采用简便的直读方式进行磁场测量。首先介绍了新型低温超导磁力仪的工作原理,并重点阐述了由其程控直读电路以及软硬件设计方案;然后在分析影响超导磁力仪数据同步因素的基础上,给出了GPS同步实现及其同步精度标定的方法;最后在良好的磁屏蔽环境中对超导磁力仪的性能以及电磁兼容进行了评估,并对影响其同步的相关因素进行了测试和标定,试验表明传感器的本底噪声约为6 f T/Hz@1 kHz,数据同步精度可达1 ms,满足实用要求。
