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

Metadata Updated: May 2, 2019

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: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_90361
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TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id e2141539-5715-4982-91c7-c44024fc4cd4
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2016-12-01
Homepage URL https://techport.nasa.gov/view/90361
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 6bd2270218cccadb7b40987d35acd968c71e7c94
Source Schema Version 1.1

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