Propagation of a laser-supported detonation wave

Bournot, Philippe; Pincosy, P.A.; Inglesakis, G.; Autric, M.; Dufresne, D.; Caressa, J. P.

doi:10.1016/0094-5765(79)90097-3

Cited by 19 publications

(9 citation statements)

References 7 publications

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“…This is an analog of the chemical detonation-wave that can be viewed as a shock followed by a strong deflagration. However, the velocity given by a Chapman-Jouguet relation does not agree with the measurements [8], [9]. Raizer suggested that some nonhydrodynamic ionization mechanism is more dominant than the shock wave, from the analog of overdriven detonation.…”

mentioning

confidence: 80%

Precursor Ionization and Propagation Velocity of a Laser-Absorption Wave in 1.053 and 10.6-<inline-formula> <tex-math notation="TeX">$\mu{\rm m}$ </tex-math></inline-formula> Wavelengths Laser Radiation

Shimamura

Komurasaki

Ofosu

et al. 2014

IEEE Trans. Plasma Sci.

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A propagation model of a laser-absorption wave was proposed and validated using the measured propagation velocity. The model describes the propagation mechanism in terms of avalanche ionization through an inverse Bremsstrahlung process and photoionization by UV radiation from bulk plasma behind the wave. Using plasma spectroscopy, the electron temperature and density at the head of laser-absorption wave were estimated as 2 eV and (1.5-2.6) × 10 24 m −3 , respectively, at 10.6-µm laser wavelength and 5 eV and (2.6-3.3) × 10 24 m −3 at 1.05 µm when the laser intensity was near the laser-supported detonation threshold in the air and argon atmosphere. Using the measured plasma properties, we estimated UV photon flux radiated by the Bremsstrahlung, which contributes the photoionization ahead of the laser-absorption wave. The resulting propagation velocity of the laser-absorption wave was 10 3 m/s, which showed good agreement with the velocity measured using a high-speed camera.Index Terms-Laser-induced plasma, laser propulsion, plasma measurement, shock wave.

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mentioning

confidence: 80%

Precursor Ionization and Propagation Velocity of a Laser-Absorption Wave in 1.053 and 10.6-<inline-formula> <tex-math notation="TeX">$\mu{\rm m}$ </tex-math></inline-formula> Wavelengths Laser Radiation

Shimamura

Komurasaki

Ofosu

et al. 2014

IEEE Trans. Plasma Sci.

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“…Laser-induced shock waves may have an important role in the early stages of plasma formation in solid targets. In fact, if the energy of the shock wave generated by the laser is enough for ionizing the surrounding gas, a so-called laser-supported detonation (LSD) [22,23] might be activated.…”

Section: Shock Wave and Plasmasmentioning

confidence: 99%

Shock Waves in Laser-Induced Plasmas

Campanella

Legnaioli

Pagnotta

et al. 2019

Atoms

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The production of a plasma by a pulsed laser beam in solids, liquids or gas is often associated with the generation of a strong shock wave, which can be studied and interpreted in the framework of the theory of strong explosion. In this review, we will briefly present a theoretical interpretation of the physical mechanisms of laser-generated shock waves. After that, we will discuss how the study of the dynamics of the laser-induced shock wave can be used for obtaining useful information about the laser-target interaction (for example, the energy delivered by the laser on the target material) or on the physical properties of the target itself (hardness). Finally, we will focus the discussion on how the laser-induced shock wave can be exploited in analytical applications of Laser-Induced Plasmas as, for example, in Double-Pulse Laser-Induced Breakdown Spectroscopy experiments.

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“…However, studies using a millimeter-wave band have begun because of the widening use of gyrotrons. According to past studies, the propagation velocity of an ionization front in a millimeter-wave discharge is revealed to have a very different tendency from that in laser discharge, as presented in Figure 8, where the measured propagation velocities in a millimeter-wave discharge using a 170 GHz (wavelength, λ = 1.76 mm) gyrotron [34,35] and a 110 GHz (λ = 2.73 mm) gyrotron [36] are shown along with those in laser discharge obtained using a CO 2 laser (λ = 10.6 μm) with sufficiently large beam spot size [37][38][39]. The propagation velocity of an ionization front in a millimeter-wave discharge is greater than those in laser discharge by one order of magnitude.…”

Section: Propagation Of Ionization Front and Filamentary Plasma Strucmentioning

confidence: 99%

“…Millimeter-wave discharge occurs even at the beam intensity far below breakdown threshold [44]. This discharge cannot be explained by field concentration nor by ambient gas expansion behind a blast wave [45,46] and requires other Figure 8: Ionization-front propagation velocity in an atmospheric millimeter-wave discharge [34,36] and laser discharge [37][38][39]. [44].…”

Section: Numerical Simulation Of Millimeter-wave Discharge Plasmamentioning

confidence: 99%

Development of a Novel Launch System Microwave Rocket Powered by Millimeter-Wave Discharge

Komurasaki

Tabata

2018

International Journal of Aerospace Engineering

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This paper presents the state of art of Microwave Rocket development and related researches on atmospheric discharge in a high-power millimeter-wave beam. Its operational mechanisms, thruster design, history of development, and flight path and cost analyses are introduced along with millimeter-wave discharge observations and numerical simulations. A thruster model of 126 g weight with no on-board propellant was launched to 1.2 m altitude using a 1 MW class gyrotron. A flight analysis that shows 77% cost reduction is possible using Microwave Rocket as the first stage of H-IIB heavy. A millimeter-wave discharge with unique plasma structure such as a quarter-wavelength microstructure and a comb-shaped filamentary structure was observed and reproduced by a two-dimensional numerical model.

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Propagation of a laser-supported detonation wave

Cited by 19 publications

References 7 publications

Precursor Ionization and Propagation Velocity of a Laser-Absorption Wave in 1.053 and 10.6-<inline-formula> <tex-math notation="TeX">$\mu{\rm m}$ </tex-math></inline-formula> Wavelengths Laser Radiation

Precursor Ionization and Propagation Velocity of a Laser-Absorption Wave in 1.053 and 10.6-<inline-formula> <tex-math notation="TeX">$\mu{\rm m}$ </tex-math></inline-formula> Wavelengths Laser Radiation

Shock Waves in Laser-Induced Plasmas

Development of a Novel Launch System Microwave Rocket Powered by Millimeter-Wave Discharge

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