Plasma spectroscopy and diagnosis lab
Paper
Laser-induced ablation of tantalum in a wide range of pulse durations
Release Time:2021-03-17
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First Author:
Mittelmann, Steffen
Correspondence Author:
Oelmann, Jannis,Brezinsek, Sebastijan,吴鼎,Ding, Hongbin,Pretzler, Georg
Date of Publication:
2021-01-10
Journal:
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Document Type:
J
Volume:
126
Issue:
9
ISSN:
0947-8396
Key Words:
Pulsed laser ablation; High-Z material; Tantalum; Ablation threshold
Abstract:
We present data and analysis of the laser-induced ablation of pure tantalum (Ta, Z=73). We have identified different physical regimes using a wide range of laser pulse durations. A comparison of the influence of strongly varying laser pulse parameters on high-Z materials is presented. The crater depth caused by three different laser systems of pulse duration Delta tau 1=5 mml:mspace width="0.166667em"mml:mspace ns and wavelength lambda 1=1064 mml:mspace width="0.166667em"mml:mspace nm, Delta tau 2=35 mml:mspace width="0.166667em"mml:mspace ps, lambda 2=355mml:mspace width="0.166667em"mml:mspacenm and Delta tau 3=8.5 mml:mspace width="0.166667em"mml:mspace fs, lambda 3=790 mml:mspace width="0.166667em"mml:mspace nm are analyzed via confocal microscopy as a function of laser fluence and intensity. The minimum laser fluence needed for ablation, called threshold fluence, decreases with shorter pulse duration from 1.10 mml:mspace width="0.166667em"mml:mspace J/cm2 for the nanosecond laser to 0.17 mml:mspace width="0.166667em"mml:mspace J/cm2 for the femtosecond laser.
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