TY - JOUR KW - Model KW - Deposition KW - Energy KW - Target KW - Gas KW - USA KW - Surface KW - Efficiency KW - Deflection KW - Velocity KW - Material KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Time KW - Beam KW - Ca KW - E KW - Sample KW - Samples KW - England KW - Excimer KW - Excimer laser KW - Solution KW - Flow KW - Polymers KW - Aluminum KW - Energies KW - M KW - Dynamics KW - Blast wave KW - Ambient KW - Shock KW - Shock wave KW - Shock wave KW - Wave KW - Beam deflection KW - Excimer laser KW - Excimer laser ablation KW - Excimer laser ablation KW - Expansion KW - Plume KW - Plume propagation KW - Prediction KW - Probe KW - Propagation AU - Sungho Jeong AU - Ralph Greif AU - Richard E Russo AB -

A probe beam deflection technique was utilized to measure the propagation of a shock wave and material vapour plume generated during excimer laser ablation of aluminium samples. The measured transit time of the laser-induced shock wave was compared with the prediction based on an ideal blast-wave model, using the Sedov-Taylor solution. The prediction of the incident laser energy converted into the laser-induced gasdynamic flow utilizing this blast-wave model overestimated the efficiency, even under conditions when the measured shock-wave velocity follows the correct model relation. The propagation of material vapour was measured from the deflection of the probe beam at later times. The propagation velocity of material vapour ranged from 20-40 m s-1 with a greater velocity near the target surface.

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Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA Kwangju Inst Sci & Technol, Mechatron Dept, Kwangju, South Korea Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

BT - Journal of Physics D: Applied Physics C2 - LBNL-43859 DA - 10/1999 DO - 10.1088/0022-3727/32/19/316 IS - 19 LA - eng LB - Laser N1 -

LBNL-43859 NOT IN FILE

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A probe beam deflection technique was utilized to measure the propagation of a shock wave and material vapour plume generated during excimer laser ablation of aluminium samples. The measured transit time of the laser-induced shock wave was compared with the prediction based on an ideal blast-wave model, using the Sedov-Taylor solution. The prediction of the incident laser energy converted into the laser-induced gasdynamic flow utilizing this blast-wave model overestimated the efficiency, even under conditions when the measured shock-wave velocity follows the correct model relation. The propagation of material vapour was measured from the deflection of the probe beam at later times. The propagation velocity of material vapour ranged from 20-40 m s-1 with a greater velocity near the target surface.

PY - 1999 SP - 2578 EP - 2585 ST - J. Phys. D: Appl. Phys. T2 - Journal of Physics D: Applied Physics TI - Shock wave and material vapour plume propagation during excimer laser ablation of aluminium samples VL - 32 ER -