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Proceedings Paper

Momentum induced by laser-tissue interaction
Author(s): Ronald S. Dingus
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Paper Abstract

Impulsive momentum is imparted to residual tissue during pulsed-laser ablation because the mass ablated is generally ejected with a sizable velocity. Accurate measurements of the impulse are possible, which can provide an important monitor of the ablation process. Simple models can be used to predict the impulse under a variety of conditions; in some cases, complex radiation-hydrodynamic code calculations are required. In this paper, this modeling is discussed along with the dependence of momentum on the pulsed heating and target conditions. Momentum measurement techniques are discussed briefly. The behavior is explained in terms of dimensionless parameters and the impulse coupling coefficient as a function of incident fluence, which has a well defined threshold as well as a maximum. Complications in the mixed liquid-vapor phase are also addressed.

Paper Details

Date Published: 7 July 1993
PDF: 13 pages
Proc. SPIE 1882, Laser-Tissue Interaction IV, (7 July 1993); doi: 10.1117/12.147690
Show Author Affiliations
Ronald S. Dingus, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 1882:
Laser-Tissue Interaction IV
Steven L. Jacques; Abraham Katzir, Editor(s)

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