20.500.12556/RUL-141334 Multi-frame multi-exposure shock wave imaging and pressure measurements 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. cavitation laser breakdown shock wave laser illumination fiber-optic hydrophone kavitacija laserski preboj udarni val lasersko osvetljevanje vlakenski merilnik tlaka true false true Angleški jezik Slovenski jezik “© 2022 Optica Publishing Group under the terms of the Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.” (Datum opombe: 12. 6. 2023) Članek v reviji 2022-09-28 12:26:10 2022-09-28 12:26:14 2023-06-12 12:55:51 0000-00-00 00:00:00 2022 0 0 Str. 37664-37674 no. 21, art. 470695 Vol. 30 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.9.048.7 1094-4087 10.1364/OE.470695 123292163 Mur_..._-_Multi-frame_multi-exposure_shock_wave_imaging_....pdf Mur_..._-_Multi-frame_multi-exposure_shock_wave_imaging_....pdf 1 069678B45B53CD486A647AEA5A9DFB40 ee24875533f37684dc99bb60ef5dfc4113ca14d76ac96058c8f1ba9a738ca432 3549c5c6-3f19-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162358 https://opg.optica.org/oe/fulltext.cfm?uri=oe-30-21-37664&id=507385 1 02c96b23-3f18-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162353 Fakulteta za strojništvo 0 0 0