ACCELERATION OF MICROPARTICLES BY LASER-INDUCED VAPOR EMISSION
- 15 January 1968
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 12 (2), 52-54
- https://doi.org/10.1063/1.1651889
Abstract
The interaction of intense laser beams against single charged particles was investigated to determine the possibility of acceleration by surface evaporation. Aluminum particles of 25 μ diam, freely suspended in a time‐varying electric field possessing focusing properties, were located within the focal spot (100 μ diam) of the normal output of a ruby laser. The individual laser spikes contribute to the stepwise acceleration of the particle and serve simultaneously for stroboscopic observation of the trajectory. With power densities of 106 W/cm2 and beam energies of a fraction of a joule, the recoil pressure due to the vaporization of the material produced directed velocities of 2 · 104 cm/sec. The present results agree with momentum conservation involving vaporization of a fraction of the particle material.Keywords
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