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Related Experiment Video

Updated: Jul 2, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

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Multiwavelength optical pyrometer for shock compression experiments.

G A Lyzenga¹, T J Ahrens

¹Seismological Laboratory, California Institute of Technology, Pasadena, California 91125, USA.

The Review of Scientific Instruments

|November 1, 1979

Summary

This summary is machine-generated.

This study details a new system for measuring the spectral radiance and shock temperatures of materials up to 8000 K. The method uses a light gas gun and photodiodes, achieving high accuracy for shock temperature measurements.

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Area of Science:

High-pressure physics
Materials science
Spectroscopy

Background:

Understanding material behavior under extreme conditions is crucial.
Accurate temperature measurements are vital for validating shock physics models.

Purpose of the Study:

To describe a novel system for measuring spectral radiance and temperature of shocked materials.
To present results from exploratory experiments on metals.

Main Methods:

Utilized a light gas gun to shock materials to approximately 100 GPa.
Employed a system to sample thermal radiation in six visible wavelength bands.
Used solid-state photodiodes for detection with 10 ns time resolution.

Main Results:

Successfully measured shock temperatures in metals within the 4000-8000 K range.
Determined spectral radiance and temperatures with uncertainties as low as 2%.

Conclusions:

The developed system reliably measures shock temperatures and spectral radiance.
The findings contribute to the understanding of material properties at high pressures.