Flash characteristics of plasma induced by hypervelocity impact

Kai Zhang; Renrong Long; Qingming Zhang; Yijiang Xue; Yuanyuan Ju

doi:10.1063/1.4960297

Flash characteristics of plasma induced by hypervelocity impact

Kai Zhang, Renrong Long^*, Qingming Zhang, Yijiang Xue, Yuanyuan Ju

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Using a two-stage light gas gun, a series of hypervelocity impact experiments was conducted in which 6.4-mm-diameter spherical 2024-aluminum projectiles impact 23-mm-thick targets made of the same material at velocities of 5.0, 5.6, and 6.3 km/s. Both an optical pyrometer composed of six photomultiplier tubes and a spectrograph were used to measure the flash of the plasma during hypervelocity impact. Experimental results show that, at a projectile velocity of 6.3 km/s, the strong flash lasted about 10 μs and reached a temperature of 4300 K. Based on the known emission lines of AL I, spectral methods can provide the plasma electron temperature. An electron-temperature comparison between experiment and theoretical calculation indicates that single ionization and secondary ionization are the two main ionizing modes at velocities 5.0-6.3 km/s.

Original language	English
Article number	083519
Journal	Physics of Plasmas
Volume	23
Issue number	8
DOIs	https://doi.org/10.1063/1.4960297
Publication status	Published - 1 Aug 2016

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T1 - Flash characteristics of plasma induced by hypervelocity impact

AU - Zhang, Kai

AU - Long, Renrong

AU - Zhang, Qingming

AU - Xue, Yijiang

AU - Ju, Yuanyuan

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Flash characteristics of plasma induced by hypervelocity impact

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