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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.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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...
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: 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: 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...
Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

Light emission computed tomography system for plasma diagnostics.

M Hino, T Aono, M Nakajima

    Applied Optics
    |June 5, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new noninvasive method, light emission computed tomography (LECT), images internal plasma emission intensity in 3-D. This technique provides effective 3-D plasma diagnostics by analyzing visible radiation, yielding good intensity distribution images.

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    Area of Science:

    • Plasma physics
    • Tomography
    • Optical diagnostics

    Background:

    • 3-D plasma measurement is crucial for analysis.
    • Practical and noninvasive diagnostic methods are needed.
    • Existing methods may lack noninvasive capabilities for internal emission intensity.

    Purpose of the Study:

    • To introduce a novel noninvasive method for 3-D plasma diagnostics.
    • To demonstrate the capability of imaging internal emission intensity of 3-D plasma sources.
    • To develop and validate a system for light emission computed tomography.

    Main Methods:

    • Developed a light emission computed tomography (LECT) system.
    • Implemented automatic data collection for LECT.
    • Performed experiments on discharge plasmas to test the system.
    • Sensed visible radiation emitted by the plasma.

    Main Results:

    • Successfully obtained 3-D images of internal emission intensity.
    • Demonstrated good images of radiation intensity distributions.
    • Validated the effectiveness of the LECT technique for plasma diagnostics.

    Conclusions:

    • Light emission computed tomography is an effective noninvasive method for 3-D plasma diagnostics.
    • The developed LECT system with automatic data collection performs well.
    • This technique enables imaging of internal emission intensity across any spectral range.