Experimental Research on Impulse Coupling Characteristics and Plasma Plume Dynamics of a Nanosecond Pulsed Laser Irradiated Aluminum Target

Yu, Chenghao; Zhou, Wen‐Xin; Chang, Hao; Chen, Yifu

doi:10.1109/access.2020.3037302

Cited by 20 publications

(16 citation statements)

References 35 publications

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“…However, when the laser fluence increases from 6.19 J cm −2 to 20.94 J cm −2 , the C m rises firstly and then declines except at atmospheric pressure. The tendency of C m is consistent with the previous results [11,38,39], which also proves the accuracy of the measurement method. The value of C m is one order of magnitude higher than that in reference [11] due to their measure system laid in a 10 −2 Pa environment.…”

Section: Impulse and Coupling Coefficient Measurementsupporting

confidence: 91%

“…The tendency of C m is consistent with the previous results [11,38,39], which also proves the accuracy of the measurement method. The value of C m is one order of magnitude higher than that in reference [11] due to their measure system laid in a 10 −2 Pa environment. The reduction in the C m at higher laser fluence is ascribed to the existence of the plasma shielding effect [39].…”

Section: Impulse and Coupling Coefficient Measurementsupporting

confidence: 91%

“…The impulse and coupling coefficient C m which is defined as a ratio of the impulse to incident laser energy [10], are the main criteria to evaluate the performance of laser propulsion. Therefore, the abundant experimental researches have been devoted to improving the impulse and C m by changing various conditions, including laser properties, target material, nature and pressure of ambient gas and constraint structure [4,[11][12][13][14][15][16][17][18][19][20]. Among these factors, the effect of background pressure on propulsion characteristics is relatively less investigated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study on the dynamics and parameters of nanosecond laser-induced aluminum plasma

Yang

Zhou

et al. 2022

J. Phys. D: Appl. Phys.

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In this paper, impulse measurement, spectral diagnostics, temporal evolution images and target ablation are employed to investigate the dynamic behaviors and parameters of Nd:YAG nanosecond laser-induced aluminum plasma at different pressures and laser fluences. The impulses and coupling coefficients generated by laser ablation increase firstly and then reduce with the decrease in pressure for the laser fluences of 17.22 J/cm2 and 20.94 J/cm2, but they only drop at 0.5 Torr for a laser fluence of 6.19 J/cm2. The fast exposure images captured by the high-speed camera and ICCD show that the plasma plumes present the separation at atmospheric pressure and expansion near vacuum, but last longer time at pressures of 150 Torr and 22 Torr. The duration and dynamic property of plasma are responsible for the impulse, as well as are mainly dependent on the characteristics of plasma parameters. Therefore, the electron density and electron temperature are obtained by Stark broadening method and Boltzmann plot, respectively. The change in the electron density is proportional to pressure and laser fluence. The variation trend of the crater depth and ablative mass with pressure is opposite to that of the electron density, which is ascribed to the plasma shielding effect caused by the inverse bremsstrahlung absorption mechanism. Besides, the electron temperature varies inversely with pressure in the detection range due to various recombination processes. This study provides an insight for clarifying the energy conversion mechanism and improving the laser propulsion performance.

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Section: Impulse and Coupling Coefficient Measurementsupporting

confidence: 91%

Section: Impulse and Coupling Coefficient Measurementsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Experimental study on the dynamics and parameters of nanosecond laser-induced aluminum plasma

Yang

Zhou

et al. 2022

J. Phys. D: Appl. Phys.

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“…The next step in our discussion is to consider how the mechanical coupling 𝐶 m behaves with respect to fluence, which is shown in Figure 6, from which various useful considerations can be extracted. First of all, it is worth to notice that 𝐶 m measured values are in good agreement (within the same order of magnitude) with other results reported in literature, although obtained with some different experimental conditions (laser wavelength [22,23], pulse duration [21,24], pressure [25,26], . .…”

Section: Impulse Generated Via Nonuniform Irradiationsupporting

confidence: 89%

The role of beam homogeneity in mechanical coupling evaluation of laser ablation-generated impulse

Terragni,

Battocchio,

Bazzanella

et al. 2021

Preprint

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The material emitted from the target surface during laser ablation generates a net thrust (propulsion) in the opposite direction. The energetic efficiency of this laser-driven propulsion is given by the mechanical coupling coefficient (𝐶 m ). In this work we considered nanosecond UV laser ablation of the aluminum 6061 alloy to study the 𝐶 m behaviour with different irradiating conditions. This is done by systematically changing: fluence, uniform/nonuniform intensity, and incident angle of the laser beam. In particular we found that, when dealing with nonuniform laser intensity, characterizing 𝐶 m exclusively in terms of fluence is not fully satisfactory because the energy distribution over the irradiated area plays a key-role in the way material is removed -interplay between vaporization and phase-explosion-and thrust is generated.

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“…The torsion pendulum method, a commonly used technique was employed to comprehensively compare and quantify the LMP performance parameters of different materials. [25,[51][52][53][54] The experimental setup and working principle of the torsion pendulum measuring system are depicted in Figure 3A. The measurements were conducted under vacuum conditions, with the vacuum box evacuated to 15 kPa.…”

Section: Resultsmentioning

confidence: 99%

MOFs for Ultrahigh Efficiency Pulsed Laser Micropropulsion

Rao,

Xu,

Yuan

et al. 2023

Advanced Materials

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Conventional propellant materials, such as polymers and single metal elements, have long been investigated for their potential in pulsed laser micropropulsion (LMP) technology. However, achieving superior LMP efficiency through physical mixing of these materials remains a significant challenge. In this study, we present a paradigm shift by introducing porous crystalline polymers, known as Metal‐Organic Frameworks (MOFs), as novel propellants in pulsed LMP. MOFs are composed of metal cations and organic ligands that form ordered structures through coordination, eliminating the problem of local hot zones arising from uneven physical mixing encountered in LMP. In direct comparison to conventional polymers and single element targets, MOFs exhibit substantially higher LMP efficiency. By precisely tailoring the metal atom fraction within MOFs, an extraordinary ultrahigh efficiency of 51.15% is achieved in pulsed LMP, surpassing the performance of similar materials previously reported in the literature. This pioneering application of MOFs not only revolutionizes the field of laser micropropulsion but also opens up new frontiers for MOF utilization in various energy applications.This article is protected by copyright. All rights reserved

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Experimental Research on Impulse Coupling Characteristics and Plasma Plume Dynamics of a Nanosecond Pulsed Laser Irradiated Aluminum Target

Cited by 20 publications

References 35 publications

Experimental study on the dynamics and parameters of nanosecond laser-induced aluminum plasma

Experimental study on the dynamics and parameters of nanosecond laser-induced aluminum plasma

The role of beam homogeneity in mechanical coupling evaluation of laser ablation-generated impulse

MOFs for Ultrahigh Efficiency Pulsed Laser Micropropulsion

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