We studied the laser ablation dynamics of steel in the thermal regime both experimentally and theoretically. The real-time monitoring of the process shows that the ablation rate depends on laser energy density and ambient pressure during the exposure time. We demonstrated that the ablation efficiency can be enhanced when the pressure is reduced with respect to the atmospheric pressure for a given laser fluence, reaching an upper limit despite of high-vacuum conditions. An analytical model based on the Hertz-Knudsen law reproduces all the experimental results.

Laser ablation dynamics in metals: The thermal regime

Mezzapesa FP;Columbo LL;Brambilla M;Dabbicco M;Ancona A;Sibillano T;Scamarcio G
2012

Abstract

We studied the laser ablation dynamics of steel in the thermal regime both experimentally and theoretically. The real-time monitoring of the process shows that the ablation rate depends on laser energy density and ambient pressure during the exposure time. We demonstrated that the ablation efficiency can be enhanced when the pressure is reduced with respect to the atmospheric pressure for a given laser fluence, reaching an upper limit despite of high-vacuum conditions. An analytical model based on the Hertz-Knudsen law reproduces all the experimental results.
2012
Istituto di fotonica e nanotecnologie - IFN
Ablation dynamics
Ablation efficiency
Ablation rates
Ambient pressures
Exposure-time
High-vacuum conditions
Laser energy den
Laser fluences
Real time monitoring
Thermal regimes
Upper limits
Ablation
Atmospheric pressure
Laser ablation
Dynamics
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/264398
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