Laser Scattering Diagnostic for Shock Front Arrival and Electron Number Density, Phase I

Metadata Updated: November 12, 2020

Three diagnostic methods are proposed for measuring properties of interest in the post-shock regions of a hypersonic bow shock wave that is used for studying planetary entry and earth reentry flows. Shock location is measured using an imaging approach by laser Rayleigh scattering from molecules, shock velocity is measured by beam deflection via schlieren effects, and electron number density is measured by Thomson scattering. The Rayleigh and Thomson scattering methods are complimentary to each other and can use the same pulsed laser. The schlieren deflection is accomplished with a continuous wave laser and can be used to generate a precise arrival time and provide triggering for the pulsed laser. Thomson and Rayleigh scattering imaging may be extended to MHz rates with pulse burst laser technology, providing a capability to time-resolve the motion of the shock wave as it passes through the test section. The electron density measurement is a direct technique with the potential for high accuracy time and space-resolved measurements. The Phase I effort will demonstrate all three techniques in laboratory environments at relevant conditions.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_90361
Data First Published 2016-12-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 78f99085a010d3199c9c6cbfb558fab56a3b8409
Source Schema Version 1.1

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