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相关概念视频

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
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相关实验视频

Updated: Jan 15, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy
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Picometer-Precision Atomic Position Tracking through Electron Microscopy

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基于CPT的高精度原子磁力计,具有紧的光学和电子架构.

Ruochen Zhang, Renfeng Dai, Hua Liu

    Optics letters
    |October 15, 2025
    PubMed
    概括

    我们使用CPT开发了一个紧的原子磁力计和一个调制的激光器,用于敏感的磁场检测. 这种便携式设备为实时矢量磁场传感提供了高精度.

    科学领域:

    • 原子物理学和量子传感.
    • 开发新的磁场传感器.

    背景情况:

    • 原子磁力计为磁场测量提供高灵敏度.
    • 现有的技术可能缺乏可移植性或实时矢量传感能力.

    研究的目的:

    • 为了呈现一个紧的,高灵敏度的原子磁力计.
    • 为了展示实时矢量磁场传感能力.

    主要方法:

    • 使用了基于CPT的紧型原子磁力计.
    • 采用直接调制的垂直腔表面发射激光器 (VCSEL).
    • 实现了用于信号处理的相位敏感检测.

    主要成果:

    • 实现了20 pT (1σ) 的静态磁场测量精度.
    • 证明方向一致性超过99.6%.
    • 线圈校准显示线性响应与Mx型磁力计相匹配.

    结论:

    • 验证了便携式高灵敏度CPT磁力计的可行性.
    • 开发的设备适用于实时矢量磁场传感.
    • 这项技术推进了紧的磁传感应用.

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    Last Updated: Jan 15, 2026

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