Nanosecond laser pulse interactions with breakdown plasma in gas medium confined in a microhole

Tao, Shuxia; Wu, Benxin

doi:10.1007/s00340-013-5466-6

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…The comparisons of the simulation results for the two situations can reveal the spatial confinement effect of the microhole sidewall on the bubble evolution and the bubble-generated shock waves. The model is based on 2D axisymmetric fluid mechanics equations supplemented by suitable equations of state (EOS), and the bubble wall (i.e., the liquid-vapor interface) is handled through the volume of fluid (VOF) method, and the surface tension at the bubble wall is handled through the continuum surface force (CSF) model [6][7][8][9][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Modelmentioning

confidence: 99%

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Effects of microhole sidewall confinement on bubble growth and bubble-generated shock waves

Dabir-Moghaddam

2016

Journal of Manufacturing Processes

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The evolution of bubbles in water may be a critical process in many technologies or applications, including several manufacturing processes. Despite the previous work on cavitations and bubbles, the prior investigations in the literature are not sufficient about the effect of a micro-scale structure (such as a microhole sidewall) confinement on the bubble evolution and on the bubble-generated shock waves. In this paper, this effect has been studied using a physics-based model, which has been verified by comparing its predictions with experimental measurements in the literature on bubble evolutions in water without a micro-scale structure confinement. Under the investigated conditions, it has been found that due to the reflection of the shock waves by the microhole sidewall and the interactions among the bubble and the reflected waves, the peak pressure on the hole bottom wall surface has been significantly enhanced. It is good work in the future to study the implications of the discovery on related manufacturing processes and other applications, and how to intentionally utilize the pressure enhancement effect to benefit the related applications and manufacturing processes.

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Section: Modelmentioning

confidence: 99%

“…2 (for the simulation results shown in Fig. 3) and The dynamic evolution of the vapor inside the bubble and the water outside the bubble are governed by the 2D compressible axisymmetric fluid mechanics equations [13][14][17][18][19]:…”

Section: Modelmentioning

confidence: 99%

Effects of microhole sidewall confinement on bubble growth and bubble-generated shock waves

Dabir-Moghaddam

2016

Journal of Manufacturing Processes

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“…In this approach, the plasma/shock waves are generated by focusing high power lasers on to the target [1][2][3][4][5][6] under various confined geometries [7][8][9][10][11][12]. The plasma thus generated induces a complex flow field that expands rapidly within the cavity, governed by the input laser energy, the ambient gas atmosphere, cavity geometry, aspect ratio and material properties of the cavity [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of spatially confined ns laser induced atmospheric air plasma and shock waves: visualization vis-à-vis validation

Guthikonda

Manikanta

et al. 2023

J. Phys. D: Appl. Phys.

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A clear visualization of the physical processes of spatially confined ns laser induced atmospheric air plasma within a rectangular glass cavity using optical imaging is presented. The occurrence of various processes starting from the early plasma and shock wave expansion dynamics to shock reflection at the cavity boundaries and compression of the plasma due to reflected shockwaves is studied using defocused shadowgraphy and self-emission imaging techniques. Experimentally, we evidenced that the counter propagating reflected primary shockwaves (PSW) interact with the expanding plasma generating a secondary shockwave (SSW) which compresses the plasma core, modifying the plasma morphology resulting in enhanced plasma parameters. The numerical simulations performed via the two-dimensional hydrodynamic (2D-HD) FLASH codes, revealed that the number density increases up to a maximum of 3.6 times compared to the unconfined plasma. The input laser pulse energy and the aspect ratio of the cavity is observed to play a dominant role in the confinement and compression of the plasma.

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“…When the laser irradiates the surface of target, the laser beam instantly vaporizes the target and produces plasma that expands rapidly, creating very high pressure at the top of the plasma, therefore, the shock wave is formed, it has been applied to laser propulsion [1,3] and laser cleaning areas [4,6], such as laser shock peening and removal of waste in space field.…”

Section: Introductionmentioning

confidence: 99%

The acceleration phenomenon of shock wave induced by millisecond-nanosecond combined-pulse laser on silicon

Li²,

Zhao³

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Silicon is an indispensable raw material in the manufacture of electronic devices, and it is widely used in aerospace field. We study the motion morphology and velocity of LSW induced by millisecond-nanosecond combined-pulse laser with different pulse delay and laser energy density irradiating silicon based on the method of laser shadowgraphy. Experimental results show that when the pulse delay is 2.4 ms, the millisecond(ms) and nanosecond(ns) laser energy density is 301 J cm −2 and 12 J cm −2 , respectively, the velocity of shock wave is 1.1 times faster than that induced by single ns pulse laser. It is inferred that the shock wave propagates in the plasma is faster than that in air. The results of this research can provide a reference for the field of optimized laser propulsion.

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Nanosecond laser pulse interactions with breakdown plasma in gas medium confined in a microhole

Cited by 12 publications

References 21 publications

Effects of microhole sidewall confinement on bubble growth and bubble-generated shock waves

Effects of microhole sidewall confinement on bubble growth and bubble-generated shock waves

Dynamics of spatially confined ns laser induced atmospheric air plasma and shock waves: visualization vis-à-vis validation

The acceleration phenomenon of shock wave induced by millisecond-nanosecond combined-pulse laser on silicon

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