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相关概念视频

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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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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相关实验视频

Updated: Mar 13, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy
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多佩塔赫兹电子计量技术

M Garg1, M Zhan1, T T Luu1

  • 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany.

Nature
|October 21, 2016
PubMed
概括
此摘要是机器生成的。

科学家使用强烈的光学场驱动二氧化中的电子运动, 将电子计量扩展到多倍赫兹范围. 这一突破使得新的连贯电子学和凝聚物质中的电子动态探索成为可能.

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科学领域:

  • 凝聚物质物理学
  • 量子电子
  • 一秒钟的科学

背景情况:

  • 电子设备的速度受固体电流的频率所限制.
  • 光场可以驱动比传统方法更高的频率的电子,使得太赫兹电子成为可能.
  • 目前的技术仅限于几百兆赫.

研究的目的:

  • 将电子计量技术扩展到多倍赫兹的频率范围.
  • 探测和控制固体中的光诱导的电子动态.
  • 建立实现多佩塔赫兹连贯电子的方法.

主要方法:

  • 在大量二氧化中驱动电子运动,使用单周期强烈的光学场.
  • 探测电子动力学与attosecond条纹的地图极端紫外线的短暂.
  • 分析光学驱动器和发射辐射的时间结构.

主要成果:

  • 证明了多倍赫兹频率范围内的电子计量技术 (具体而言,最多8倍赫兹).
  • 建立了极端紫外线辐射与光诱导的相连贯带内电流之间的联系.
  • 获得了二氧化的动态非线性导电性.

结论:

  • 在每秒的时间尺度上对带内电流进行直接探测和控制,从而实现多倍赫兹连贯电子.
  • 这种技术为探索电子动力学和原子尺度上的凝聚物质结构开辟了新的途径.
  • 这些发现突破了电子速度和信号处理的极限.