抽運(yùn)-檢測(cè)型非線性磁光旋轉(zhuǎn)銣原子磁力儀的研究
發(fā)布時(shí)間:2018-08-31 08:29
【摘要】:報(bào)道了一種抽運(yùn)-檢測(cè)型的非線性磁光旋轉(zhuǎn)銣原子磁力儀.其原理是線偏振光通過(guò)處于外磁場(chǎng)環(huán)境中被極化的原子介質(zhì)后,由于原子對(duì)線偏振光中左、右圓偏成分不同的吸收和色散,導(dǎo)致光的偏振方向會(huì)產(chǎn)生與磁場(chǎng)相關(guān)的轉(zhuǎn)動(dòng).分析了該磁力儀的工作原理,并測(cè)試了它對(duì)不同磁場(chǎng)大小的響應(yīng).測(cè)試結(jié)果表明,磁力儀測(cè)量范圍為100—100000 nT,極限靈敏度為0.2 p T/Hz~(1/2),磁場(chǎng)分辨率為0.1 p T.進(jìn)一步研究了不同磁場(chǎng)下原子系綜極化態(tài)的橫向弛豫時(shí)間,討論了原子磁力儀高磁場(chǎng)采樣率的獲得方法.本文的原子磁力儀在5000—100000 n T的磁場(chǎng)測(cè)量范圍內(nèi)磁場(chǎng)采樣率可實(shí)現(xiàn)1—1000 Hz范圍內(nèi)可調(diào),能夠測(cè)量低頻的微弱交變磁場(chǎng).本文的研究?jī)?nèi)容為大磁場(chǎng)測(cè)量范圍、高靈敏度、高磁場(chǎng)采樣率的原子磁力儀研制提供了重要參考.
[Abstract]:A pump-detection nonlinear magneto-optic rotating rubidium atomic magnetometer is reported.The principle is that the polarized light passes through an atomic medium polarized in an external magnetic field and the polarized light is rotated in a magnetic field due to the different absorption and dispersion of the atoms to the left and right circular polarization components of the linearly polarized light. The measuring results show that the magnetometer has a measuring range of 100-100000 nT, a limiting sensitivity of 0.2 P T/Hz~ (1/2) and a magnetic field resolution of 0.1 P T. The transverse relaxation time of the atomic ensemble polarization state in different magnetic fields is further studied, and the height of the atomic magnetometer is discussed. The magnetic field sampling rate of the atomic magnetometer can be adjusted in the range of 1-1000 Hz in the magnetic field measurement range of 5000-100000 n T. It can measure the weak alternating magnetic field of low frequency. Important reference.
【作者單位】: 蘭州空間技術(shù)物理研究所真空技術(shù)與物理重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:O562
本文編號(hào):2214448
[Abstract]:A pump-detection nonlinear magneto-optic rotating rubidium atomic magnetometer is reported.The principle is that the polarized light passes through an atomic medium polarized in an external magnetic field and the polarized light is rotated in a magnetic field due to the different absorption and dispersion of the atoms to the left and right circular polarization components of the linearly polarized light. The measuring results show that the magnetometer has a measuring range of 100-100000 nT, a limiting sensitivity of 0.2 P T/Hz~ (1/2) and a magnetic field resolution of 0.1 P T. The transverse relaxation time of the atomic ensemble polarization state in different magnetic fields is further studied, and the height of the atomic magnetometer is discussed. The magnetic field sampling rate of the atomic magnetometer can be adjusted in the range of 1-1000 Hz in the magnetic field measurement range of 5000-100000 n T. It can measure the weak alternating magnetic field of low frequency. Important reference.
【作者單位】: 蘭州空間技術(shù)物理研究所真空技術(shù)與物理重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:O562
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,本文編號(hào):2214448
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