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Related Concept Videos

Thomson's e/m Experiment01:19

Thomson's e/m Experiment

In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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).
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Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

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Related Experiment Video

Updated: Jun 14, 2026

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels
11:34

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels

Published on: September 8, 2016

Thomson scattering on a 20-psec time scale.

H A Baldis, C J Walsh, R Benesch

    Applied Optics
    |April 8, 2010
    PubMed
    Summary
    This summary is machine-generated.

    High-resolution Thomson scattering, using a spectrograph and streak camera, achieves 20 picosecond time resolution for laser-plasma interaction studies. This method effectively analyzes plasma instabilities by capturing time and spectrally resolved scattered signals.

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    Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels
    11:34

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    Published on: September 8, 2016

    High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
    08:48

    High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water

    Published on: April 28, 2022

    Area of Science:

    • Plasma Physics
    • Laser-Plasma Interactions
    • Spectroscopy

    Background:

    • Thomson scattering is a crucial diagnostic for plasma characterization.
    • Previous methods lacked sufficient temporal and spectral resolution for dynamic plasma phenomena.
    • Understanding plasma instabilities is vital for fusion energy and astrophysics.

    Purpose of the Study:

    • To present a novel technique for high-resolution Thomson scattering.
    • To achieve precise time and spectral resolution of scattered signals.
    • To investigate plasma instabilities in laser-produced plasmas.

    Main Methods:

    • Coupling a spectrograph to a high-sensitivity streak camera.
    • Utilizing Thomson scattering to probe plasma properties.
    • Achieving time resolutions down to 20 picoseconds.

    Main Results:

    • Demonstration of time and spectrally resolved Thomson scattered signals.
    • Identification of temporal dispersion in the spectrograph as a key limitation.
    • Presentation of experimental results from laser-plasma interaction studies.

    Conclusions:

    • The developed technique offers significant advancements in high-resolution Thomson scattering.
    • The method is effective for studying dynamic processes like plasma instabilities.
    • Further improvements can be made by addressing spectrograph temporal dispersion.