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相关概念视频

Group Polarization01:01

Group Polarization

38.3K
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
38.3K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.6K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.6K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

966
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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相关实验视频

Updated: Jan 8, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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使用细分的APPLE-II波动器进行任意极化控制.

Kento Inaba1, Yoshiyuki Ohtsubo1, Akane Agui1

  • 1NanoTerasu Center, National Institutes for Quantum Science and Technology (QST), Sendai, Miyagi 980-8572, Japan.

Journal of synchrotron radiation
|December 15, 2025
PubMed
概括

一个新的APPLE-II波浪器为光谱学提供了灵活的X射线极化控制. 这项技术可以精确调整光子极化,推进软和柔软的X射线应用.

关键词:
果二号波浪器的使用方法极化控制 极化控制细分的波浪器是细分的波浪器.

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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 频谱学是一种光谱学.

背景情况:

  • 先进的X射线源对于光谱学至关重要.
  • 控制光子极化可以增强材料分析.
  • 现有的波浪器在极化多功能性方面存在局限性.

研究的目的:

  • 开发和评估一款新的四段式APPLE-II波浪器.
  • 为了在柔软到柔软的X射线区域实现任意偏振控制.
  • 为了使NanoTerasu BL13U的多功能X射线吸收光谱成为可能.

主要方法:

  • 使用了四段的APPLE-II波动器设计.
  • 采用电磁相变器来调整同步辐射的相位.
  • 在180-3000 eV的能量范围内研究了极化控制.

主要成果:

  • 通过循环偏振光来证明任意的线性偏振控制.
  • 成功生成并控制圆极化辐射.
  • 实现了多功能极化状态,包括对圆角的控制.

结论:

  • 开发的波动器为X射线光谱学提供了前所未有的极化控制.
  • 这项技术显著提高了同步光源的功能.
  • 未来的工作包括探索第三和生成的X射线圆极化.