本文選題：復(fù)合磁屏蔽 + 超導(dǎo)量子干涉儀��； 參考：《物理》2017年05期

【摘要】：高效磁屏蔽對(duì)于超高精度超導(dǎo)量子干涉儀(SQUID)等超高靈敏器件可靠穩(wěn)定工作至關(guān)重要。實(shí)踐中一般采用多層的高磁導(dǎo)率笨重復(fù)合磁屏蔽,或者用小型的輕量屏蔽桶配合差分式平面梯度計(jì)完成超高靈敏信號(hào)測(cè)量。文章作者提出并實(shí)現(xiàn)了一種新型的高性能磁屏蔽裝置,采用實(shí)時(shí)的動(dòng)態(tài)磁補(bǔ)償與高溫超導(dǎo)線圈相結(jié)合就可以實(shí)現(xiàn)。對(duì)該裝置磁屏蔽效果進(jìn)行了數(shù)值仿真計(jì)算,并實(shí)際測(cè)量了該屏蔽裝置的軸向和橫向磁場(chǎng),裝置屏蔽因數(shù)最高可達(dá)80 dB;實(shí)驗(yàn)測(cè)量發(fā)現(xiàn),新型裝置可以同時(shí)有效地屏蔽軸向與縱向磁場(chǎng)干擾。
[Abstract]:High efficiency magnetic shielding is very important for the reliable and stable operation of ultra-high sensitive devices such as super high precision superconducting quantum interferometer (squid). In practice, multilayer magnetic shield with high permeability and heavy composite magnetic shield, or small light shield barrel with differential plane gradiometer are used to measure ultra-high sensitive signal. A new type of high performance magnetic shielding device is proposed and implemented in this paper, which can be realized by combining real-time dynamic magnetic compensation with high temperature superconducting coil. The magnetic shielding effect of the device is numerically simulated, and the axial and transverse magnetic fields of the shielding device are measured. The maximum shielding factor of the device is 80 dB, and the experimental results show that, The new device can effectively shield both axial and longitudinal magnetic field interference at the same time.
【作者單位】： 北京航空航天大學(xué)微納測(cè)控與低維物理教育部重點(diǎn)實(shí)驗(yàn)室;北京航空航天大學(xué)航天器磁學(xué)與超導(dǎo)技術(shù)聯(lián)合實(shí)驗(yàn)室;山東省質(zhì)量技術(shù)監(jiān)督教育培訓(xùn)中心;
【基金】：國(guó)家國(guó)防科技工業(yè)局資助項(xiàng)目
【分類(lèi)號(hào)】：TN03

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本文編號(hào)：2074989