Effects of Voltage and Current Waveforms on Pulse Discharge Energy Transfer to Underwater Shock Waves for Medical Applications

Abstract For applying shock waves to precise medical procedures like neurosurgery, a reliable generation of micro shock waves is required. Such sensitive applications make limits on usage of conventional underwater shock wave sources like Extracoporeal Shock Waves ESW [1] or micro explosives [2]. In the present study a Q-switched Ho:YAG laser and an optical fiber are used. Advantages of this method over previous shock wave sources are two order of magnitude reduction in focusing area if compared with ESW and elimination of product gases of micro explosives. Nakahara and Nagayama [3] studied underwater shock waves emanated from surface of an optical fiber by pulse Nd:YAG laser input using shadowgraph technique. Their qualitative study limited to visualization of shock waves at its early stage. The present research aims to clarify quantitatively process of the shock wave generation by direct laser beam irradiation through optical fibers, growth and behavior of generated cavities, and structure of heat induced flow in front of the optical fiber.

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Coatings for Mitigating the Effects of Underwater Shock Waves on Structures

Blast Mitigation Strategies in Marine Composite and Sandwich Structures - Springer Transactions in Civil and Environmental Engineering ◽

10.1007/978-981-10-7170-6_17 ◽

2017 ◽

pp. 321-335 ◽

Cited By ~ 1

Author(s):

Serge Abrate

Keyword(s):

Shock Waves ◽

Underwater Shock

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Shock waves dynamics investigations for surface discharge energy analysis

Shock Waves ◽

10.1007/978-3-540-85181-3_113 ◽

2009 ◽

pp. 1491-1496

Author(s):

D.F. Latfullin ◽

I.V. Mursenkova ◽

I.A. Znamenskaya ◽

T.V. Bazhenova ◽

A.E. Lutsky

Keyword(s):

Shock Waves ◽

Energy Analysis ◽

Surface Discharge ◽

Discharge Energy

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Relaxation Effects in the Propagation of Underwater Shock Waves

Cavitation and Inhomogeneities in Underwater Acoustics ◽

10.1007/978-3-642-51070-0_25 ◽

1980 ◽

pp. 177-183

Author(s):

T. N. Fedoseeva ◽

F. E. Fridman ◽

V. N. Goldberg ◽

I. G. Zarnitsina

Keyword(s):

Shock Waves ◽

Relaxation Effects ◽

Underwater Shock

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Electrical wire explosion as a source of underwater shock waves

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/ac10a3 ◽

2021 ◽

Author(s):

Huantong Shi ◽

Guofeng Yin ◽

Xingwen Li ◽

Jian Wu ◽

Anthony B Murphy ◽

...

Keyword(s):

Shock Waves ◽

Wire Explosion ◽

Electrical Wire ◽

Electrical Wire Explosion ◽

Underwater Shock

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Strength and Frequency of Underwater Shock Waves Related to Sterilization Effects on a Marine Bacterium

31st International Symposium on Shock Waves 2 ◽

10.1007/978-3-319-91017-8_1 ◽

2019 ◽

pp. 1-8

Author(s):

J. Wang ◽

A. Abe ◽

N. Ito ◽

K. Nishibayashi

Keyword(s):

Shock Waves ◽

Marine Bacterium ◽

Underwater Shock

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New Multifunctional FGM Coatings Produced Using ESA and TRESS Methods

Materials Science Forum ◽

10.4028/www.scientific.net/msf.492-493.359 ◽

2005 ◽

Vol 492-493 ◽

pp. 359-366

Author(s):

A.E. Kudryashov ◽

E.I. Zamulaeva ◽

P.V. Vakaev ◽

Yu.S. Pogozhev ◽

E.A. Levashov

Keyword(s):

Mass Transfer ◽

Electrode Materials ◽

Pulse Discharge ◽

Discharge Energy ◽

Structure And Properties ◽

High Quality ◽

Optimum Energy ◽

Transfer Structure

The influence of nanodispersed complex additives (ZrO2, Al2O3, W, WC, WC-Co, NbC, Si3N4) to SHS electrode materials on the mass transfer, structure and properties of electrospark coatings has been considered dependent on variation of the energy regimes of processing. The influence of the pulse discharge energy on the structure, composition, and properties of TRESS coatings has been studied. The optimum energy regimes of depositing high-quality multifunctional graded ESA and TRESS coatings have been found. It has been shown that introduction of nanodispersed complexes into electrode materials promotes improvement of the properties of ESA coatings.

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