Observation of shock waves and cooling waves in the laser ablation of Kapton films in air

Koren, G.
August 1987
Applied Physics Letters;8/24/1987, Vol. 51 Issue 8, p569
Academic Journal
Deflections of a He-Ne laser beam in excimer and CO2 laser-produced plumes from Kapton films were measured. They show that in addition to the existence of a shock wave observed earlier, a slower cooling wave is also developed. A model calculation is presented which explains the present experimental data as well as previous results regarding the decrease of etching efficiency with increasing ambient gas pressure.


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