26 April 2006 Plasma in bright spot and nature of void chain in fiber fuse track
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Proceedings Volume 6161, International Conference on Lasers, Applications, and Technologies 2005: Laser-Assisted Micro- and Nanotechnologies; 61610M (2006); doi: 10.1117/12.675077
Event: International Conference on Lasers, Applications, and Technologies 2005, 2005, St. Petersburg, Russian Federation
Abstract
A qualitative explanation of effect of formation of a chain of equidistant cavities at laser destruction of a fiber core is proposed. It is shown that periodicity of cavities can be caused by instability of new type. On border of plasma and a liquid there is a double layer of charges of high density. In view of repulsion between of the same charges the surface aspires to increase. That provides development of the instability resulting in formation of a chain of cavities. The simple mechanism of instability is proposed. The pressure caused by repulsion of charges on border plasma-liquid leads to formation of a stream between the isotherms corresponding to plasma-liquid border and the liquid-solid substance border. Essential development of instability takes place, when speed of a squeezed out liquid is compared to speed of a bright spot movement. The squeezed out liquid forms the "bridge". The form of a cavity as a bullet flying on laser radiation is caused by pointedness of the isotherms.
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S. I. Yakovlenko, "Plasma in bright spot and nature of void chain in fiber fuse track", Proc. SPIE 6161, International Conference on Lasers, Applications, and Technologies 2005: Laser-Assisted Micro- and Nanotechnologies, 61610M (26 April 2006); doi: 10.1117/12.675077; https://doi.org/10.1117/12.675077
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KEYWORDS
Liquids

Plasma

Bridges

Chemical species

Ionization

Absorption

Temperature metrology

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