NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Exploratory investigations of hypervelocity intact capture spectroscopyThe ability to capture hypervelocity projectiles intact opens a new technique available for hypervelocity research. A determination of the reactions taking place between the projectile and the capture medium during the process of intact capture is extremely important to an understanding of the intact capture phenomenon, to improving the capture technique, and to developing a theory describing the phenomenon. The intact capture of hypervelocity projectiles by underdense media generates spectra, characteristic of the material species of projectile and capture medium involved. Initial exploratory results into real-time characterization of hypervelocity intact capture techniques by spectroscopy include ultra-violet and visible spectra obtained by use of reflecting gratings, transmitting gratings, and prisms, and recorded by photographic and electronic means. Spectrometry proved to be a valuable real-time diagnostic tool for hypervelocity intact capture events, offering understanding of the interactions of the projectile and the capture medium during the initial period and providing information not obtainable by other characterizations. Preliminary results and analyses of spectra produced by the intact capture of hypervelocity aluminum spheres in polyethylene (PE), polystyrene (PS), and polyurethane (PU) foams are presented. Included are tentative emission species identifications, as well as gray body temperatures produced in the intact capture process.
Document ID
20040089667
Document Type
Reprint (Version printed in journal)
Authors
Tsou, P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena CA United States)
Griffiths, D. J.
Date Acquired
August 21, 2013
Publication Date
January 1, 1993
Publication Information
Publication: International journal of impact engineering
Volume: 14
ISSN: 0734-743X
Subject Category
Exobiology
Distribution Limits
Public
Copyright
Other
Keywords
NASA Center JPL
NASA Discipline Exobiology