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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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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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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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Updated: Aug 12, 2025

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Imaging velocimetry techniques, specifically Velocity Interferometer System for Any Reflector (VISAR) variants, are crucial for high energy density (HED) science. These methods enable detailed studies in fields from fusion energy to planetary science.

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Area of Science:

  • High energy density (HED) physics
  • Optical diagnostics
  • Materials science

Background:

  • Optical imaging velocimetry, including Velocity Interferometer System for Any Reflector (VISAR), is vital for HED science.
  • Key applications include inertial confinement fusion and dynamic compression studies.

Purpose of the Study:

  • To review the historical development of imaging VISAR techniques.
  • To describe current implementations at major HED facilities.
  • To showcase diverse applications of imaging VISARs.

Main Methods:

  • Review of historical development of 1D streaked line-imaging and 2D time-resolved area-imaging VISAR.
  • Description of current VISAR implementations at global HED facilities (e.g., OMEGA, NIF).
  • Compilation of diverse experimental applications.

Main Results:

  • Imaging VISARs have evolved significantly and are widely implemented.
  • These techniques are versatile tools for dynamic compression and HED research.
  • Applications span materials science, shock physics, plasma physics, and astrophysics.

Conclusions:

  • Imaging VISARs are powerful and versatile diagnostics in HED science.
  • Their continued development and application are essential for advancing research in fusion energy and beyond.
  • The techniques support a wide array of scientific disciplines and experimental approaches.