Quartz gauge and ballistic pendulum measurements of the mechanical impulse imparted to a target by a laser pulse

Jean-Yves David; J. C. Wettling; Patrick Combis; G. Nierat; M. Rostaing

doi:10.1117/12.25960

1 February 1991 Quartz gauge and ballistic pendulum measurements of the mechanical impulse imparted to a target by a laser pulse

Jean-Yves David, J. C. Wettling, Patrick Combis, G. Nierat, M. Rostaing

Author Affiliations +

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25960
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

A laser impact striking a target with a sufficient irradiance generateg a thermo-shock. It is possible to measure the amplitude of this shock as a function of time with a quartz gauge . The integration of this pressure signal gives a first estimate of the mechanical impulse imparted to the target. It is also possible to achieve this by measuring the speed of the gravity centre of a ballistic pendulum. The momentum amount of the mobile set m?v? is a first approximation of the mechanical impulse. However,for more accurate measurement it is necessary to take into account the moment of inertia and the position of the gravity centre with respect to the rotation axis.

Citation Download Citation

Jean-Yves David, J. C. Wettling, Patrick Combis, G. Nierat, and M. Rostaing "Quartz gauge and ballistic pendulum measurements of the mechanical impulse imparted to a target by a laser pulse", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25960

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