Investigation of the laser generated ablation plasma plume dynamics and plasma plume sound wave dynamics

Tański, M.; Barbucha, R.; Kočík, M.; Garasz, K.; Mizeraczyk, J.

doi:10.1117/12.2013415

Cited by 4 publications

(7 citation statements)

References 13 publications

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“…The formation of this shock wave expanding starts in a short time period (0.2-0.5 ns), when the mass of the shock wave becomes comparable with the plume mass [57,58]. The following movement of the plasma plume in ambient gas can be described by the drag model [35,56,59]:…”

Section: Plasma Shielding Effectmentioning

confidence: 99%

“…The pressure in the front shock wave is typically 100–200 atm and decays to close to ambient pressure in 100–200 ns [ 55 ]. In the latter time, the shock wave slows down to the speed of sound and travels forward as a sound wave [ 56 ]. The formation of this shock wave expanding starts in a short time period (

ns), when the mass of the shock wave becomes comparable with the plume mass [ 57 , 58 ].…”

Section: Physical Limitations Of Laser Surface Texturingmentioning

confidence: 99%

See 1 more Smart Citation

Scanning Strategies in Laser Surface Texturing: A Review

2023

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Laser surface texturing (LST) is one of the most promising technologies for controllable surface structuring and the acquisition of specific physical surface properties needed in functional surfaces. The quality and processing rate of the laser surface texturing strongly depend on the correct choice of a scanning strategy. In this paper, a comparative review of the classical and recently developed scanning strategies of laser surface texturing is presented. The main attention is paid to maximal processing rate, precision and existing physical limitations. Possible ways of further development of the laser scanning strategies are proposed.

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Section: Plasma Shielding Effectmentioning

confidence: 99%

ns), when the mass of the shock wave becomes comparable with the plume mass [ 57 , 58 ].…”

Section: Physical Limitations Of Laser Surface Texturingmentioning

confidence: 99%

Scanning Strategies in Laser Surface Texturing: A Review

2023

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“…One of the experiments were carried out by [17], taking into consideration a few significant parameters at once, i.e. pulse repetition rate, limited to megahertz range, at an average laser power level and fixed wavelength.…”

Section: State Of the Artmentioning

confidence: 99%

“…During these studies, numerous problems have appeared, such as instability of the laser pulse energy and power fluctuations. Although the fiber solid state laser was used, so far the researchers have failed to take full advantage of CPA amplified lasers laser-matter interactions investigations, mostly because of the low repetition rates used [16] [17].…”

Section: State Of the Artmentioning

confidence: 99%

Precise micromachining of materials using femtosecond laser pulses

et al. 2015

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We present the results of the experimental parametric study on efficiency, accuracy and quality of femtosecond laser micromachining of different materials. The laser micromachining process was performed with a solid-state Yb:KYW laser. The laser generates 500 fs pulses of three different wavelengths, repetition rate from 100 to 900 kHz and output power up to 50 W. This allows to perform a complex research for a wide range of parameters and materials.Laser micromachining is a process based on a laser ablation phenomenon, i.e. total evaporation of material from the target surface during laser irradiation. It is the most precise method of material removal. Applying a femtosecond laser in the process, allows the use of ultra short pulses, with a duration of 10 -15 seconds, while maintaining a high laser power. The concentration of energy within a single pulse is sufficiently high to cause the detachment of particles from the irradiated target without any thermal interactions with the surrounding material. Therefore, the removal of the material occurs only in the laser focus. This allows to avoid most of the unwanted effects of the heat affected zone (HAZ).It has been established, that the quality of laser ablation process using femtosecond pulses is much higher than while using the long pulsed lasers (i.e. nanosecond). The use of femtosecond laser pulses creates therefore an attractive opportunity for high quality micromachining of many groups of materials.

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“…30 LTSD can be adjusted based on the strong relationship between optical and acoustic emissions during the laser ablation process. [31][32][33] In LIBS measurements, the plasma expansion generates a shock wave that can be recorded using a microphone [34][35][36] because the shock wave propagates as a classical acoustic wave aer several microseconds in the air under atmospheric pressure. 37 The laser-plasma acoustic waves are generated in forward and backward modes.…”

Section: Introductionmentioning

confidence: 99%