ǂThe ǂaction of a laser on an aluminium target

Višnja Henč-Bartolič (Author), Tonica Bončina (Author), Suzana Jakovljević (Author), Davor Pipić (Author), Franc Zupanič (Author)

Abstract

A nitrogen laser beam (337 nm, 6 ns (FWHM), (3.2 [plus minus] 0.2) mJ) was focused with a quartz lens (f = 100 mm) onto an aluminium target in air at normal pressure. The laser irradiation and plasma explosion caused a modification to the Al surface and the deposition of a thin film (droplets) onto a glassy carbon plate. The irradiated target and the deposited material were studied with a scanning electron microscope (SEM) and a focused-ion-beam (FIB) device. A crater surrounded by a rim was produced on the spot of maximum irradiation on the aluminium target. The crater, very deep in comparison to its width and thickness, was presumably caused by the Kelvin-Helmholtz and the Rayleigh-Taylor instabilities. The temperatures of the electron and the massive particles were explained.

Keywords

aluminium;laser ablation;thin film deposition;instabilities;temperatures;

Data

Language:	English
Year of publishing:	2008
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	Inštitut za kovinske materiale in tehnologije Ljubljana
UDC:	669.71:620.1/.2
COBISS:	678058
ISSN:	1580-2949
Parent publication:	Materiali in tehnologije
Views:	836
Downloads:	86
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Other data

Secondary language:	Slovenian
Secondary title:	Obsevanje aluminijaste tarče z laserjem
Secondary abstract:	Žarek laserske svetlobe (337 nm, 6 ns ((FWHM), (3.2 [plus minus] 0.2) mJ) smo s kremenovo lečo (f = 100 mm) fokusirali na aluminijevo tarčo, ki je bila na zraku pri normalnem zračnem tlaku. Obsevanje z laserjem in eksplozija plazme sta povzročila spremembo površine aluminija ter nanos tanke plasti in kapljic na steklasto ogljikovo ploščico. Obsevano tarčo in nanesen material smo raziskali z vrstičnim elektronskim mikroskopom (SEM) in s fokusiranim ionskim curkom (FIB). Na aluminijevi tarči je na najbolj obsevanem mestu nastal krater, ki je bil zelo globok v primerjavi z njegovo širino in debelino. Krater je bil povzročen zaradi Kelvin-Helmholtzove in Rayleigh-Taylorjeve nestabilnosti. V delu smo razložili tudi temperaturo elektronov in temperaturo masivnih delcev.
Secondary keywords:	aluminij;laserska ablacija;nanašanje tanke plasti;nestabilnosti;temperatura;
URN:	URN:NBN:SI
Type (COBISS):	Scientific work
Pages:	str. 111-115
Volume:	ǂVol. ǂ42
Issue:	ǂno. ǂ3
Chronology:	2008
ID:	9593831