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Title: Generation of shock trains in free liquid jets with a nanosecond green laser

Abstract

Shock wave trains in liquid jets were previously generated only by ablation with femtosecond x-ray lasers. Here we show that shock trains in water microjets can be also generated using nanosecond green laser pulses with 1- to 10-mJ energy. Furthermore, the ablation of 15-, 20-, 30-, and 70-μm water microjets opened a gap in the jets and launched an initial shock wave. Fully developed shock trains were observed in the 30- and 70-μm jets up to 250-ns delays, and these trains were also transmitted inside the nozzles. A few tens of nanoseconds after the pulse, the shock dynamics and its pressure became similar to the ones generated by x-ray lasers, with a more rapid pressure decay in thinner jets. At time delays exceeding 100 ns in the 30-μm jets, the leading shock pressure stabilized to an approximately constant pressure of 40 MPa. The energy density deposited in the jets was estimated at 30 MJ/cm3 by comparing the jet gaps in the green and x-ray laser experiments, and matched previous estimates for optical ablation in water. Here, the pressure decay in the 30-μm jets was modeled based on the pressure decay observed in x-ray laser experiments.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Horia Hulubei National R&D Inst. for Physics and Nuclear Engineering (IFIN-HH), Măgurele (Romania)
  2. Rutgers Univ., Newark, NJ (United States)
Publication Date:
Research Org.:
Rutgers Univ., Newark, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1734623
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Fluids
Additional Journal Information:
Journal Volume: 5; Journal Issue: 12; Journal ID: ISSN 2469-990X
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Laser ablation; shock waves; lasers

Citation Formats

Ursescu, Daniel, Aleksandrov, Veselin, Matei, Dan, Dancus, Ioan, de Almeida, Matias D., and Stan, Claudiu A.. Generation of shock trains in free liquid jets with a nanosecond green laser. United States: N. p., 2020. Web. https://doi.org/10.1103/physrevfluids.5.123402.
Ursescu, Daniel, Aleksandrov, Veselin, Matei, Dan, Dancus, Ioan, de Almeida, Matias D., & Stan, Claudiu A.. Generation of shock trains in free liquid jets with a nanosecond green laser. United States. https://doi.org/10.1103/physrevfluids.5.123402
Ursescu, Daniel, Aleksandrov, Veselin, Matei, Dan, Dancus, Ioan, de Almeida, Matias D., and Stan, Claudiu A.. Tue . "Generation of shock trains in free liquid jets with a nanosecond green laser". United States. https://doi.org/10.1103/physrevfluids.5.123402.
@article{osti_1734623,
title = {Generation of shock trains in free liquid jets with a nanosecond green laser},
author = {Ursescu, Daniel and Aleksandrov, Veselin and Matei, Dan and Dancus, Ioan and de Almeida, Matias D. and Stan, Claudiu A.},
abstractNote = {Shock wave trains in liquid jets were previously generated only by ablation with femtosecond x-ray lasers. Here we show that shock trains in water microjets can be also generated using nanosecond green laser pulses with 1- to 10-mJ energy. Furthermore, the ablation of 15-, 20-, 30-, and 70-μm water microjets opened a gap in the jets and launched an initial shock wave. Fully developed shock trains were observed in the 30- and 70-μm jets up to 250-ns delays, and these trains were also transmitted inside the nozzles. A few tens of nanoseconds after the pulse, the shock dynamics and its pressure became similar to the ones generated by x-ray lasers, with a more rapid pressure decay in thinner jets. At time delays exceeding 100 ns in the 30-μm jets, the leading shock pressure stabilized to an approximately constant pressure of 40 MPa. The energy density deposited in the jets was estimated at 30 MJ/cm3 by comparing the jet gaps in the green and x-ray laser experiments, and matched previous estimates for optical ablation in water. Here, the pressure decay in the 30-μm jets was modeled based on the pressure decay observed in x-ray laser experiments.},
doi = {10.1103/physrevfluids.5.123402},
journal = {Physical Review Fluids},
number = 12,
volume = 5,
place = {United States},
year = {2020},
month = {12}
}

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