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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.
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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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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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High performance testbed for four-beam infrared interferometric nulling and exoplanet detection.

Stefan Martin1, Andrew Booth, Kurt Liewer

  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA. stefan.r.martin@jpl.nasa.gov

Applied Optics
|June 15, 2012
PubMed
Summary

A new testbed demonstrates key components for a space interferometer designed to detect and characterize earthlike exoplanets. It addresses instability noise, a critical factor for improving sensitivity in planet detection missions.

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Area of Science:

  • * Astronomy and Astrophysics
  • * Optical Interferometry
  • * Exoplanet Detection

Background:

  • * Space-based infrared nulling interferometers are crucial for detecting and characterizing earthlike exoplanets.
  • * Development in this field has intensified over the last decade.
  • * Instability noise is a significant challenge impacting the sensitivity of nulling interferometers.

Purpose of the Study:

  • * To present the design, functions, and controls of a four-beam nulling interferometer testbed.
  • * To demonstrate the principal components of a beam combiner train for space-based interferometry.
  • * To investigate methods for mitigating instability noise in high-performance nulling interferometers.

Main Methods:

  • * Development of a four-beam nulling interferometer testbed at the Jet Propulsion Laboratory.
  • * Incorporation of essential features required for a space interferometer's beam combiner.
  • * Testing and performance evaluation of the testbed to match mission requirements.

Main Results:

  • * The developed testbed successfully demonstrates the principal components of a four-beam nulling interferometer.
  • * The testbed generates instability noise, enabling the study of mitigation techniques.
  • * Testbed performance aligns with the requirements for a space-based exoplanet detection mission.

Conclusions:

  • * The developed testbed is a vital tool for advancing space-based exoplanet detection technology.
  • * It provides a platform for understanding and mitigating instability noise.
  • * The testbed's capabilities meet the necessary performance levels for future space missions.