Launch and impact characteristics of typical multi-layered flyers driven by ns-pulsed laser

Zhang, Haonan; Wu, Lizhi; Hu, Peng; Guo, Weibo; Zhang, Wei; Ye, Yinghua; Shen, Ruiqi

doi:10.1016/j.optlastec.2019.105709

“…In the 1980s, Paisley realized the impact initiation of finegrained HNS by using the laser-driven flyer plate for the first time and started the impact initiation of insensitive explosives by using the laser as energy [7]. In order to realize the miniaturization and engineering application of the laserdriven flyer plate impact initiation, many researchers have carried out a wealth of research from the aspects of optical fiber transmission of pulsed laser energy, preparation of high-efficiency flyer plates, and refinement of detonating agents [8][9][10][11][12][13][14][15]. Bowden et al developed a laser-driven flyer initiation system under the condition of closed optical path by using the optical fiber transmission laser [16].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Optimization Design of Multilayer Flyer Plates for Laser-Driven Loading

Guo

¹

,

Cao

²

,

Wang

³

et al. 2022

Self Cite

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The laser-driven flyer plate is an important loading technology in high energy physics, shock wave physics, and explosive initiation application. How to generate a high-velocity and intact flyer plate by using the laser is a matter of concern for laser driving. In this study, the multilayer flyer plates (MFPs) of Al/Al2O3/Al and TiO2/Al/Al2O3/Al with adjustable performance were designed and fabricated by magnetron sputtering and analyzed by scanning electron microscopy (SEM), laser reflectance spectrometer, and differential thermal analysis (DTA). The effects of the structure and material on the output performance of MFPs were analyzed by photon Doppler velocimetry (PDV) and ultrahigh-speed video. The morphology results showed that the structure of MFPs had uniform and clear boundaries between side-by-side layers. The MFP velocity was controlled in the range of 4.0–6.0 km/s by adjusting the film thickness, structure, and thermite material with 43.1 J/cm2 laser ablation. Among them, the energetic flyers with the thermite ablation layer had the highest final velocity of 5.38 km/s due to the prestored energy of TiO2/Al. By appropriately increasing the thickness of Al2O3 from 0.4 μm to 0.8 μm, the complete flight of the flyer plate to 3.72 mm can be realized. In addition, TiO2/Al thermite film had characteristics of reaction heat release and lower laser reflectivity (72.13%) than the Al layer (80.55%), which explained the velocity enhancement effect of energetic flyer plates. This work provides facile strategy to enhance the output performance of MFPs, which may facilitate the practical applications of laser driving technology.

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“…To miniaturize and industrialize LDFs, improving their energy conversion e ciency has long been a major scienti c and technological goal. In recent years, the multilayer structures, which usually includes the ablating layer, insulation layer and launching layer, have been widely investigated to improve the speed and integrity of the yer [8][9][10]. The ablating layer is the key to improve the energy utilization e ciency, and is usually composed by the normal optical absorption lms or the reactive multilayer lms, where the reactive multilayer lms can supply additional energy through thermionic reaction to accelerate yer.…”

Section: Introductionmentioning

confidence: 99%

Self-assembled perfect absorber for laser-driven flyer

Ji¹,

Qin²,

Wang³

et al. 2022

Laser Phys.

0

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In this work, we experimentally demonstrate a high-performance laser-driven flyer (LDF) by introducing a perfect absorber in the ablation layer to improve the energy utilization efficiency, where the perfect absorber is composed of a layer of silver nano-triangular array, a dielectric layer, and a layer of silver film. The perfect absorber was realized by the simple and low-cost colloid lithography technique, and the maximal absorbance can reach to about 95% at 1064 nm under an optimization condition. The in-depth electromagnetic simulation indicates that the perfect absorber can greatly improve the energy absorbance in the ablation layer at the beginning of laser illumination, and thus the temperature and pressure of the subsequently generated plasma. In experiment, this improved plasma was used to launch a 25 µm thick Al flyer, and the flyer velocity was measured using a photonic Doppler velocimetry. A maximum speed of about 2140 m s − 1 was achieved in experiment, which is about 1.3 times larger than that (1650 m s − 1 ) of pure Al foil flyers. The extracted transient accelerated speed indicates that the absorber improved LDF owns higher accelerated speed at the beginning 20 ns, especially for the beginning 5 ns. The striking experiment indicates that the flyers formed in the improved LDF own a larger averaged striking depth, and some flyers give a striking depth in 80 µm that is twice larger than that formed in the normal LDF. The electromagnetic properties of the perfect absorber, the transient speed of flyer, and the striking morphology have been systematically investigated.

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“…The latter one would prevent the utilization of highly toxic hydrazine and dinitrogen tetroxide and allows the usage of “green” nonhypergolic propellants, which are getting initiated when irradiated with a laser diode. , Lasers are already being used for the initiation or ignition of energetic materials and are attracting increasing attention in this field of research (Figure ). − …”

Section: Introductionmentioning

confidence: 99%

Comparison of 1-Propyl-5H-tetrazole and 1-Azidopropyl-5H-tetrazole as Ligands for Laser Ignitable Energetic Materials

Wurzenberger

¹

,

Endraß

²

,

Lommel

³

et al. 2020

ACS Appl. Energy Mater.

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Laser ignitable explosives are potential candidates in future applications for replacing toxic and very sensitive primary explosives, which are used in current devices. In this study, the literature unknown ligand 1-azidopropyl-5H-tetrazole (APT, 1) was synthesized for the first time and applied in energetic coordination compounds (ECC). The complexes are based on different 3d transition metals (Mn 2+ , Fe 2+ , Cu 2+ , and Zn 2+ ) as well as various oxidizing anions (NO 3 − , ClO 4 − , and ClO 3 − ) and were tested toward their capability as laser ignitable explosives. Furthermore, analogous complexes based on the literature known ligand 1-propyl-5H-tetrazole (PT, 2) were investigated for comparing the influence of the additional azide group toward the performance of the ECC. Toxicity measurements using Vibrio fischeri and the decreased sensitivities prove their usability as safer laser ignitable explosive with lower toxicities compared to currently used explosives.

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Launch and impact characteristics of typical multi-layered flyers driven by ns-pulsed laser

Cited by 11 publications

References 32 publications

Fabrication and Optimization Design of Multilayer Flyer Plates for Laser-Driven Loading

Fabrication and Optimization Design of Multilayer Flyer Plates for Laser-Driven Loading

Self-assembled perfect absorber for laser-driven flyer

Comparison of 1-Propyl-5H-tetrazole and 1-Azidopropyl-5H-tetrazole as Ligands for Laser Ignitable Energetic Materials

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