Mixing of laser-induced plumes colliding in a background gas

Katayama, Keita; Kinoshita, T.; Okada, Ren; Fukuoka, Hiroshi; Yoshida, Takehiro; Yaga, Minoru; Aoki-Matsumoto, Tamao; Umezu, Ikurou

doi:10.1007/s00339-022-06136-1

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…In the case of DPLA, not only the effect of the shock wave propagating just in front of the plume but also the counter-propagating shock wave is important for plume expansion dynamics. For example, the backward movement of the plume after the collision with the counter-propagating shock front is experimentally observed in DPLA [6] [7].…”

Section: Introductionmentioning

confidence: 99%

“…The effects of the counter-propagating shock wave on the plume can be simulated by replacing the plume with the unsteady supersonic jet. The change in the plume expansion direction [8] and the backward movement of the plume [7] after the collision of the two shock waves have been discussed by this method. The advantages of the calculation are that quantitative analysis is possible and initial conditions can be set freely.…”

Section: Introductionmentioning

confidence: 99%

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Study on Collision Process of Opposing Unsteady Supersonic Jets and Shock Waves

Uno¹,

Fukuoka²,

Suda³

et al. 2023

OJFD

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Double pulsed-laser-ablation is a promising method to prepare nanoparticle composites. The backward movement of the plume after the collision with counter-propagating shock wave has been observed in experiments. In the present study, collision dynamics of the oppositely injected Si and Ge jets into a He background gas was numerically calculated as a simulation for double pulsed-laser-ablation. The experimentally observed backward movement was reproduced. The effect of distance between two jet exits on the distance of backward movement of the jet, B L , after the collision with the counter-propagating shock front was calculated to discuss the collision dynamics and to optimize the target distance for the experiment. We found that B L does not decrease monotonically with increasing distance between two jet exits, but has a maximum value at a certain distance. This behavior is discussed by calculating the expansion dynamics of an individual jet. Shock wave grows with time at the initial stage of the jet expansion and then attenuates; the density just behind the shock front for individual jet has a maximum value at a certain time and position. B L has a maximum value when the densities just behind the shock fronts for the individual jets have maximum values. This result is important for designing the appropriate distance between the two jet exits, i.e., the distance between the targets of double pulsed-laser-ablation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Collision Process of Opposing Unsteady Supersonic Jets and Shock Waves

Uno¹,

Fukuoka²,

Suda³

et al. 2023

OJFD

Self Cite

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Geometrical Analysis of the Stagnation Zone in Laterally Colliding Plasmas: Effects of Plasma Plume Separation and Ablating Target Material

Al-Juboori

McCormack

2023

Plasma

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The influence of an ablating target’s atomic mass on the development and growth of the interaction zone in laterally colliding plasmas has been investigated. As diagnostic tools, fast imaging and optical emission techniques were used to evaluate the characteristics of the seed plasma as well as the interaction zone created by different target materials (i.e., aluminum and silicon). The current findings show that the dynamical, spectral, and geometrical properties of the generated interaction zone are affected by the features of the ablated species and the geographical separation of the interacting plumes. The interaction of aluminum plume species results in a sharper, more intense, and more directed stagnation zone than that reported for silicon targets using a 450 nm filter. Furthermore, the investigation of the interaction area emission from both regions for aluminum (Al) and silicon (Si) plasma explains the variation in plasma properties in the stagnation zone. As a part of this work’s description, a comparative study of the dynamics and characteristics of the homogenous interaction region produced by colliding plasma plumes by laser ablation of flat Al and Si targets has been presented, which can provide deep insight into the characterization of colliding laser-produced plasma expansion and related physical and technical properties.

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Mixing of laser-induced plumes colliding in a background gas

Cited by 2 publications

References 22 publications

Study on Collision Process of Opposing Unsteady Supersonic Jets and Shock Waves

Study on Collision Process of Opposing Unsteady Supersonic Jets and Shock Waves

Geometrical Analysis of the Stagnation Zone in Laterally Colliding Plasmas: Effects of Plasma Plume Separation and Ablating Target Material

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