Near threshold nucleation and growth of cavitation bubbles generated with a picosecond laser

Vid Agrež (Avtor), Jaka Mur (Avtor), Jaka Petelin (Avtor), Rok Petkovšek (Avtor)

Povzetek

The nucleation and growth of cavitation bubbles few micrometers in size in water generated by a 60 ps 515 nm fiber laser is observed and visualized near nucleation threshold. The study is performed by monitoring the plasma size, the cavitation bubble size and the emitted shock waves. The latter two aspects are supported by the Gilmore model using a Noble-Abel-stiffened-gas (NASG) equations of state. For the first time, two types of cavitation events are identified and visualized that exhibit a difference of more than two orders of magnitude in the excitation energy converted to mechanical effects with minimal change in excitation laser pulse energy. The result is localized cavitation and reduced mechanical stress on water-based media with potentially positive implications for laser treatments of biological tissue.

Ključne besede

micro cavitation;bubble nucleation;dual threshold;shockwaves;laser induced breakdown;

Podatki

Jezik:	Angleški jezik
Leto izida:	2023
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FS - Fakulteta za strojništvo
UDK:	532.528
COBISS:	132471299
ISSN:	1350-4177
Št. ogledov:	292
Št. prenosov:	139
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	mikro kavitacija;dvojni prag;udarni valovi;lasersko povzročen preboj;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 1-8
Zvezek:	ǂVol. ǂ92
Čas izdaje:	Jan. 2023
DOI:	10.1016/j.ultsonch.2022.106243
ID:	17332122