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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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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.
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Optical pyrometer system for collisionless shock experiments in high-power laser-produced plasmas.

T Morita1, Y Sakawa, Y Kuramitsu

  • 1Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan. moritat@ile.osaka-u.ac.jp

The Review of Scientific Instruments
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A new optical pyrometer system measures laser-produced plasma emissions. This system, using a gated optical imager and streaked optical pyrometer, accurately determines electron temperature and density in low-density plasmas.

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Area of Science:

  • Plasma physics
  • Optical diagnostics
  • Laser-produced plasmas

Background:

  • Accurate measurement of plasma properties is crucial for understanding high-energy density physics.
  • Laser-produced plasmas are complex systems requiring advanced diagnostic tools.
  • Previous methods for plasma characterization have limitations in temporal and spatial resolution.

Purpose of the Study:

  • To develop and field a temporally and spatially resolved optical pyrometer system for Gekko XII experiments.
  • To measure self-emission from laser-produced plasmas.
  • To assess the system's applicability for determining electron temperature and density in low-density plasmas.

Main Methods:

  • Utilized a gated optical imager (GOI) and a streaked optical pyrometer (SOP).
  • Measured plasma self-emission at 450 nm with a ~10 nm FWHM bandpass filter.
  • Calibrated measurements using multiple methods, achieving agreement within 30%.

Main Results:

  • Successfully fielded a temporally and spatially resolved optical pyrometer system.
  • Demonstrated the system's capability to measure plasma self-emission intensity.
  • Validated the system's accuracy through cross-calibration.

Conclusions:

  • The developed optical pyrometer system is a valuable tool for characterizing laser-produced plasmas.
  • The system provides accurate measurements of electron temperature and density in low-density plasmas.
  • Applicable for studying phenomena such as collisionless shock experiments.