Optical-fiber interferometer for velocity measurements with picosecond resolution

Weng, Jidong; Tan, Hua; Wang, Xiang; Ma, Yanxing; Hu, Shaolou; Wang, Xiaosong

doi:10.1063/1.2335948

Cited by 110 publications

(43 citation statements)

References 7 publications

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“…In the present work, the detonation reaction characteristics of seven types of CL-20-based explosives containing different amounts and particle sizes of aluminum were experimentally investigated. Because of the short reaction times, an all-fiber "displacement interferometer system for any reflector" (DISAR) [9], with time resolution less than 5 ns, was employed to measure the explosive/window interfacial particle velocity. A new two-function fitting analysis was used to determine the CJ points on the interfacial velocity curves.…”

Section: Introductionmentioning

confidence: 99%

Detonation Reaction Characteristics for CL-20 and CL-20-based Aluminized Mixed Explosives

Liu¹,

Chen²,

Chen³

et al. 2017

Cent. Eur. J. Energ. Mater.

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Abstract:The interfacial particle velocities for CL-20 and CL-20-based aluminized mixed explosives were measured by interferometry in order to analyze the aluminum reactions in the latter. The reaction characteristics were obtained, as well as a better understanding of the effects of aluminum powder on the detonation reaction zone length. Two functions were used to fit the particle velocity-time profiles, and their intersection was the corresponding Chapman-Jouget (CJ) point. From these profiles, the detonation reaction zone length and the aluminum reaction were then analyzed. CL-20-based explosives have a short reaction time (48 ns for a high CL-20 content), while the reaction time of CL-20/Al explosives increased with the aluminum content and particle size. Micron-scale aluminum particles barely reacted in the CL-20 detonation reaction zone, but instead reacted with the detonation products after the CJ point. This reduced the detonation pressure; however, the aluminum reaction can slow down the decrease in particle velocities. The start times of small-particle aluminum reactions were earlier than those of the larger particles. The 2-3-µm aluminum particles start to react within 1 µs after the CJ point, while the 200-nm particles may start to react in the reaction zone.

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Section: Introductionmentioning

confidence: 99%

Detonation Reaction Characteristics for CL-20 and CL-20-based Aluminized Mixed Explosives

Liu¹,

Chen²,

Chen³

et al. 2017

Cent. Eur. J. Energ. Mater.

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“…In the experiment, a GDI was accelerated to 4,711 m/s. The particle velocity profile was measured using a picoseconds time-resolved DPS diagnostic system [13]. A *1-lm-thick stainless steel film was deposited at the LiF front surface to enhance reflected signal of the DPS system.…”

Section: Gas Gun Experimentsmentioning

confidence: 99%

Fabrication of graded density impactor via underwater shock wave and quasi-isentropic compression testing at two-stage gas gun facility

Sun

Hokamoto

2014

Appl. Phys. A

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We show direct evidence that underwater shock wave enables us to bond multithin plates with flat, parallel, and high-strength interfaces, which are key requirements for functionally graded material (also called graded density impactor). This phenomenon is ascribed to the super short duration of the high-speed underwater shock wave, reducing the surface tension, diffusion, evaporation, deposition, and viscous flow of matter. Thin magnesium, aluminum, titanium, copper, and molybdenum foils were welded together and designed with the increase in density. Experimental evidence and numerical simulation show that well bonding between the multilayer structures. Microstructure examinations reveal that the dominant interfacial form shifts from waviness to linearity. Graded density impactor with multilayer structure is proved that can produce quasi-isentropic compression in twostage gas gun experiment with a designed pressure loading profile, which suggests a feasible method to simulate the conditions we want to study that were previously inaccessible in a precisely controlled laboratory environment.

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“…The product of metallic foil electrical explosion drives the Mylar flyer which is cut by the PMMA barrel to circular plate to high speed and then, the flyer impacts target sample. The rear surface velocity of sample was recorded by DPS (Doppler Pins System), 12 and impact experiments conditions are listed in table I. Although flyer diameter is less than samples', the diameter of impact area is sufficient to ensure one dimensional strain state within the observation time.…”

Section: B Plate-impact Experimentsmentioning

confidence: 99%

Dynamic behaviors of a Zr-based bulk metallic glass under ramp wave and shock wave loading

et al. 2015

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Dynamic behaviors of Zr51Ti5Ni10Cu25Al9 bulk metallic glass were investigated using electric gun and magnetically driven isentropic compression device which provide shock and ramp wave loading respectively. Double-wave structure was observed under shock compression while three-wave structure was observed under ramp compression in 0 ∼ 18GPa. The HEL of Zr51Ti5Ni10Cu25Al9 is 8.97 ± 0.61GPa and IEL is 8.8 ± 0.3GPa, respectively. Strength of Zr51Ti5Ni10Cu25Al9 estimated from HEL is 5.0 ± 0.3GPa while the strength estimated from IEL is 3.6 ± 0.1GPa. Shock wave velocity versus particle velocity curve of Zr51Ti5Ni10Cu25Al9 under shock compression appears to be bilinear and a kink appears at about 18GPa. The Lagrangian sound speed versus particle velocity curve of Zr51Ti5Ni10Cu25Al9 under ramp wave compression exhibits two discontinuances and are divided to three regions: elastic, plastic-I and plastic-II. The first jump-down occurs at elastic-plastic transition and the second appears at about 17GPa. In elastic and plastic-I regions, Lagrangian sound speed increases linearly with particle velocity, respectively. Characteristic response of sound speed in plastic-I region disagree with shock result in the same pressure region(7GPa ∼ 18GPa), but is consistent with shock result at higher pressure(18-110GPa).

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Optical-fiber interferometer for velocity measurements with picosecond resolution

Cited by 110 publications

References 7 publications

Detonation Reaction Characteristics for CL-20 and CL-20-based Aluminized Mixed Explosives

Detonation Reaction Characteristics for CL-20 and CL-20-based Aluminized Mixed Explosives

Fabrication of graded density impactor via underwater shock wave and quasi-isentropic compression testing at two-stage gas gun facility

Dynamic behaviors of a Zr-based bulk metallic glass under ramp wave and shock wave loading

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