Physics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..771e&link_type=abstract
Planetary and Space Science, vol. 24, Aug. 1976, p. 771-781.
Physics
29
Hypervelocity Impact, Light Emission, Metal Particles, Microparticles, Angular Distribution, Cratering, Luminous Intensity, Particle Accelerators, Particle Mass
Scientific paper
Measurements were made of the light intensity and total light energy of the light flash produced by the impact of microparticles consisting of iron, aluminum, carbon, and tungsten accelerated to hypervelocities by a Van de Graaf dust accelerator. Signals from a photomultiplier tube detecting the flash were recorded in order to measure maximum light intensity, total light energy, and primary impact velocity. Temperatures of the luminous material were estimated by using the entire spectral distribution of the light emission. This enabled the angular distribution of secondary particle velocities and the relative mass distribution of these particles to be determined. Using the measured dependence of the light flash on the ambient pressure in the target chamber enabled obtaining first estimates of the amount of vaporized material.
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