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Imaging velocity interferometer system for any reflector (VISAR) diagnostics for high energy density sciences.

Peter M Celliers¹, Marius Millot¹

¹Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of Scientific Instruments

|February 1, 2023

Summary

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.