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Related Concept Videos

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).
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.
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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...
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,...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...

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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
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2D electron cyclotron emission imaging at ASDEX Upgrade (invited).

I G J Classen1, J E Boom, W Suttrop

  • 1Max Planck Institut für Plasmaphysik, 85748 Garching, Germany. ivo.classen@ipp.mpg.de

The Review of Scientific Instruments
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

A new electron cyclotron emission imaging diagnostic offers high-resolution 2D measurements of electron temperature dynamics. This tool aids in studying plasma phenomena like edge localized modes and reversed shear Alfvén eigenmodes.

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Area of Science:

  • Plasma Physics
  • Fusion Energy Research

Background:

  • Understanding electron temperature dynamics is crucial for magnetic confinement fusion.
  • Existing diagnostics have limitations in spatial and temporal resolution for capturing fast plasma phenomena.

Purpose of the Study:

  • To introduce and detail the new electron cyclotron emission imaging (ECEi) diagnostic on ASDEX Upgrade.
  • To demonstrate the capabilities of ECEi for 2D electron temperature measurements.
  • To showcase advanced data analysis techniques for ECEi data.

Main Methods:

  • Installation and calibration of the ECEi diagnostic.
  • Acquisition of 2D electron temperature data during plasma discharges.
  • Analysis of edge localized modes (ELMs) and reversed shear Alfvén eigenmodes (RSAEs).
  • Application of singular value decomposition (SVD) for data analysis and filtering.

Main Results:

  • The ECEi diagnostic provides high spatial and temporal resolution 2D electron temperature measurements.
  • Measurements successfully captured dynamics of ELMs and RSAEs, highlighting the advantages of 2D imaging.
  • Limitations of ECE measurements were identified and illustrated.
  • SVD proved effective for analyzing and filtering complex 2D ECEi data.

Conclusions:

  • The ECEi diagnostic is a valuable tool for studying 2D electron temperature dynamics in fusion plasmas.
  • ECEi enhances the understanding of plasma instabilities and transport phenomena.
  • Advanced analysis methods like SVD are essential for maximizing the utility of ECEi data.