Accession Number : ADA291368

Title :   Investigation of Optical Damage, Energy Partitioning and Scaling Laws at Extremely High Velocities.

Descriptive Note : Contract rept. Aug 93-Aug 94,

Corporate Author : KENT UNIV CANTERBURY (UNITED KINGDOM) DEPT OF PHYSICS

Personal Author(s) : McDonnell, J. A. ; Ratcliff, P. R. ; Kay, L. ; Niblett, D. H. ; Burchell, M. J.

PDF Url : ADA291368

Report Date : OCT 1994

Pagination or Media Count : 115

Abstract : Optical damage assessment is presented from analysis of retrieved space damaged material (solar cell arrays); results, show a peak in the space environment damage effects in millimetre region and a dominance by meteoroids in this region. Impact damage features on glass will be folded with the results of the energy partitioning which derive from the unique 2 MV Van de Graaff facility achieving (in this report) velocities of up to 42 km sec-1. Results from experimental campaigns incorporating simultaneous measurement of impact plasma, impact light flash and momentum enhancement provide new data on the fundamental features of energy partitioning in hypervelocity impacts phenomena such as ejecta momentum and kinetic energy, plasma and vapour production, and light flash energies. Hydrocode simulations are also described, which give insight into energy partitioning. Results from a study of the impact light flash are presented which have proven principles of the prototype chamber design. Results which complement the energy partitioning data obtained from the plasma studies show readily the sensitivity of this technique as a study tool on the Van de Graaff facility. (AN)

Descriptors :   *HYPERVELOCITY IMPACT, *DAMAGE ASSESSMENT, *OPTICAL ANALYSIS, COMPUTERIZED SIMULATION, LIGHT SCATTERING, OPTICAL PROPERTIES, EXPERIMENTAL DATA, OPTIMIZATION, SPACE ENVIRONMENTS, PLASMAS(PHYSICS), HIGH VELOCITY, PROTOTYPES, ENERGY TRANSFER, IMPACT STRENGTH, SOLAR CELLS, SCALING FACTOR, KINETIC ENERGY, SYNCHRONISM, MOMENTUM, VAN DE GRAAFF GENERATORS, GREAT BRITAIN, SOLAR PANELS, EJECTA, IMPACT FLASH, METEOROIDS.

Subject Categories : Optics
      Mechanics
      Electric Power Production and Distribution
      Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE