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Related Experiment Video

Updated: May 29, 2026

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

High resolution 3D gas-jet characterization.

Björn Landgraf¹, Michael Schnell, Alexander Sävert

¹Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, Jena, Germany.

The Review of Scientific Instruments

|September 8, 2011

Summary

This summary is machine-generated.

We developed a tomographic method to characterize non-symmetric gas jets for laser-plasma experiments. This technique accurately reconstructs 3D neutral density distributions, improving experimental precision.

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Last Updated: May 29, 2026

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Area of Science:

Plasma Physics
Optical Diagnostics
Fluid Dynamics

Background:

High-intensity laser-plasma interactions require precise characterization of gas jet targets.
Gas jet shapes can be complex and non-symmetric, posing challenges for traditional diagnostic methods.

Purpose of the Study:

To present a tomographic method for characterizing the 3D neutral density distribution of gas jets.
To establish criteria for optimal interferogram acquisition and compare with existing methods.

Main Methods:

Utilized a Mach-Zehnder interferometer to measure phase shifts through the gas jet.
Employed tomographic reconstruction based on filtered back projections to retrieve 3D density maps.
Compared tomographic results with Abel inversion techniques.

Main Results:

Achieved a spatial resolution of less than 60 μm for Argon gas.
Successfully characterized non-symmetric gas jets, including those with shock waves and rectangular nozzles.
Determined criteria for the minimum number of interferograms needed for accurate reconstruction.

Conclusions:

Tomographic reconstruction offers a robust method for characterizing complex gas jet geometries.
The developed technique provides high spatial resolution and sensitivity for laser-plasma experiment diagnostics.