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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Atomic Emission Spectroscopy: Overview01:20

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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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,...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
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Explosive Particle Dispersion in Plasma Turbulence.

S Servidio1, C T Haynes2, W H Matthaeus3

  • 1Dipartimento di Fisica, Università della Calabria, I-87036 Cosenza, Italy.

Physical Review Letters
|September 10, 2016
PubMed
Summary
This summary is machine-generated.

Particle dynamics in plasma turbulence show normal diffusion over long times. In intermediate ranges, particles exhibit explosive dispersion, crucial for astrophysical and laboratory plasmas.

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Area of Science:

  • Plasma Physics
  • Astrophysics
  • Computational Physics

Background:

  • Plasma turbulence is a key phenomenon in astrophysical and laboratory settings.
  • Understanding particle dynamics within this turbulence is essential for explaining heating, mixing, and acceleration processes.

Purpose of the Study:

  • To investigate particle dynamics in 2D plasma turbulence using self-consistent kinetic simulations.
  • To analyze the trajectories of single protons and proton pairs at varying plasma beta values.

Main Methods:

  • Utilized self-consistent kinetic simulations in two dimensions.
  • Studied steady-state particle trajectories for single protons and proton pairs.
  • Examined particle behavior across different plasma beta (β) values.

Main Results:

  • Single-particle displacements align with fluid and magnetic field line dynamics, showing normal diffusion over extended periods.
  • Higher plasma beta values correlate with increased diffusion.
  • Particles exhibit explosive dispersion in intermediate time ranges, consistent with Richardson's prediction.

Conclusions:

  • The findings provide the first kinetic model validation of explosive particle dispersion in plasma turbulence.
  • Results are significant for understanding processes in astrophysical and laboratory plasmas.