Energy conversion and momentum coupling of the sub-kJ laser ablation of aluminum in air atmosphere

Energy conversion and momentum coupling using nano-second 1-μm-wavelength pulse laser irradiation on an aluminum target were measured in air and nitrogen gas atmospheres over a wide range of laser pulse energies from sub-J to sub-kJ. From the expansion rate of the shock wave, the blast-wave energy c...

Full description

Saved in:
Bibliographic Details
Published inJournal of applied physics Vol. 118; no. 7
Main Authors Mori, Koichi, Maruyama, Ryo, Shimamura, Kohei
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 21.08.2015
Subjects
ABLATION
ALUMINIUM
Aluminum
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONTROLLED ATMOSPHERES
Coupling
ENERGY CONVERSION
Energy conversion efficiency
ENERGY EFFICIENCY
Fluence
Laser ablation
LASER RADIATION
Lasers
Momentum
NITROGEN
Pressure
PRESSURE RANGE KILO PA
PULSED IRRADIATION
SHOCK WAVES
Wave power
WAVELENGTHS
Online AccessGet full text

Cover

More Information
Summary:Energy conversion and momentum coupling using nano-second 1-μm-wavelength pulse laser irradiation on an aluminum target were measured in air and nitrogen gas atmospheres over a wide range of laser pulse energies from sub-J to sub-kJ. From the expansion rate of the shock wave, the blast-wave energy conversion efficiency, ηbw, was deduced as 0.59 ± 0.02 in the air atmosphere at an ambient pressure from 30 to 101 kPa for a constant laser fluence at 115 J/cm2. Moreover, the momentum coupling of a circular disk target was formulated uniquely as a function of the dimensionless shock-wave radius and the ratio of the laser spot radius to the disk radius, while ηbw could be approximated as constant for the laser fluence from 4.7 to 4.1 kJ/cm2, and the ambient pressure from 0.1 to 101 kPa.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4928968