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Related Concept Videos

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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IR Spectroscopy: Molecular Vibration Overview01:24

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When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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IR Frequency Region: Fingerprint Region01:03

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
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Defining the infrared systems for ITER.

R Reichle1, P Andrew, G Counsell

  • 1ITER Organization, 13115 St. Paul-lez-Durance, France. roger.reichle@iter.org

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

Wide angle viewing and divertor thermography systems for the International Thermonuclear Experimental Reactor (ITER) will provide crucial infrared imaging. These diagnostics are essential for operational monitoring and detailed physics research on plasma-facing components.

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Area of Science:

  • Nuclear Fusion Engineering
  • Plasma Physics Diagnostics
  • Infrared Imaging Technology

Background:

  • The International Thermonuclear Experimental Reactor (ITER) requires advanced diagnostic systems for monitoring and research.
  • Effective thermal management and surface analysis of plasma-facing components are critical for fusion reactor operation.

Purpose of the Study:

  • To define specifications for wide angle viewing and divertor thermography systems for ITER.
  • To ensure these systems provide adequate spatial and temporal resolution for operational and physics investigation needs.

Main Methods:

  • Proposing detailed specifications for infrared coverage of divertor and first wall surfaces.
  • Jointly defining system requirements to meet operational and physics investigation objectives.
  • Conducting risk analysis to prioritize future development efforts.

Main Results:

  • Specifications are proposed to enable infrared coverage of key ITER components.
  • The proposed systems aim to achieve resolutions suitable for both operational monitoring and in-depth physics studies.
  • Identified key areas for future work including mirror degradation and radiation effects on optics.

Conclusions:

  • The proposed specifications for wide angle viewing and divertor thermography systems are designed to meet ITER's diagnostic requirements.
  • Addressing identified risks is crucial for the successful implementation and long-term performance of these diagnostic systems.
  • These advanced diagnostics will be vital for ITER's operational success and scientific exploration.