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Slattery, J. C.

Publications and source records attributed to Slattery, J. C..

At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Luminous efficiency measurements for silicon and aluminum simulated micrometeors

Laboratory measurements on simulated silicon and aluminum micrometeors in an air atmosphere have produced values for the elemental photographic luminous efficiencies of silicon over a velocity range 13-48 km/sec and of aluminum over a range 12-42 km/sec. The photographic luminous efficiency of both elements first increases with increasing velocity, then reaches a peak and declines. Supplementary measurements on Si and Al in atmospheres of O2 and N2 support the air results.

Becker, D. G.↗
NASA NTRS1973

A linear accelerator for simulated micrometeors.

Review of the theory, design parameters, and construction details of a linear accelerator designed to impart meteoric velocities to charged microparticles in the 1- to 10-micron diameter range. The described linac is of the Sloan Lawrence type and, in a significant departure from conventional accelerator practice, is adapted to single particle operation by employing a square wave driving voltage with the frequency automatically adjusted from 12.5 to 125 kHz according to the variable velocity of each injected particle. Any output velocity up to about 30 km/sec can easily be selected, with a repetition rate of approximately two particles per minute.

Slattery, J. C.↗
NASA NTRS1973

Study of impact cratering in lunar-like materials

Electrostatically accelerated microparticles are used to perform simulated micrometeoroid impact cratering experiments in oligoclase. Impact craters were obtained using iron, lanthanum hexaboride, and silicon as the projectile materials. Each particle material was impacted at normal incidence and at 30 and 60 deg oblique angles. Tabular data for all impacts are presented and central crater pit diameter normalized to particle diameter and the total spall diameter normalized to particle diameter are plotted vs impact velocity for nine particle/angle combinations and three crystal orientations. Impact crater characteristics are photodocumented as a function of impact velocity for the nine particle/angle combinations and three crystal orientations in oligoclase and at fixed impact velocity for six other minerals.

Roy, N. L.↗
NASA NTRS1972

Investigation of high speed phenomena

Experimental research is reported for laboratory simulation of meteors and meteoroid impacts on solid surfaces. Two types of mass measurements are discussed: impact ionization risetime effect, and luminous efficiency measurements.

Becker, D. G.↗