Jaka Mur (Author), Fabian Reuter (Author), Jernej Jan Kočica (Author), Žiga Lokar (Author), Jaka Petelin (Author), Vid Agrež (Author), Claus-Dieter Ohl (Author), Rok Petkovšek (Author)

Abstract

Shock wave visual detection was traditionally performed using streak cameras, limited to homogeneous shock wave emission, with the corresponding shock wave pressure measurements available at rather large distances or numerically estimated through equation of state for water. We demonstrate a multi-frame multi-exposure shock wave velocity measurement technique for all in-plane directions of propagation, based on custom-built illumination system allowing multiple illumination pulses within each frame at multi-MHz frame rates and at up to 200 MHz illumination pulse repetition frequency at sub-nanosecond pulse durations. The measurements are combined and verified using a fiber-optic probe hydrophone, providing independent shock wave pressure and time-of-flight measurements, creating a novel all-optical measurement setup. The measured pressures at distances around 100 µm from the plasma center exceed 500 MPa, while camera-based measurements at even shorter distances indicate pressures above 1 GPa.

Keywords

cavitation;laser breakdown;shock wave;laser illumination;fiber-optic hydrophone;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.9.048.7
COBISS: 123292163 Link will open in a new window
ISSN: 1094-4087
Views: 151
Downloads: 63
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Other data

Secondary language: Slovenian
Secondary keywords: kavitacija;laserski preboj;udarni val;lasersko osvetljevanje;vlakenski merilnik tlaka;
Type (COBISS): Article
Pages: str. 37664-37674
Volume: ǂVol. ǂ30
Issue: ǂno. ǂ21
Chronology: 2022
DOI: 10.1364/OE.470695
ID: 16596565