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Title: Flash characteristics of plasma induced by hypervelocity impact

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.

Authors:
 [1];  [2]; ; ; ;  [1]
  1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22599926
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; ELECTRON TEMPERATURE; ELECTRONS; EMISSION; GUNS; IONIZATION; OPTICAL PYROMETERS; PHOTOMULTIPLIERS; PLASMA; PROJECTILES; SPHERICAL CONFIGURATION; TEMPERATURE RANGE OVER 4000 K; TUBES; VELOCITY

Citation Formats

Zhang, Kai, Beijing Automotive Technology Center, Beijing 100021, Long, Renrong, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Zhang, Qingming, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Xue, Yijiang, and Ju, Yuanyuan. Flash characteristics of plasma induced by hypervelocity impact. United States: N. p., 2016. Web. doi:10.1063/1.4960297.
Zhang, Kai, Beijing Automotive Technology Center, Beijing 100021, Long, Renrong, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Zhang, Qingming, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Xue, Yijiang, & Ju, Yuanyuan. Flash characteristics of plasma induced by hypervelocity impact. United States. doi:10.1063/1.4960297.
Zhang, Kai, Beijing Automotive Technology Center, Beijing 100021, Long, Renrong, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Zhang, Qingming, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn, Xue, Yijiang, and Ju, Yuanyuan. Mon . "Flash characteristics of plasma induced by hypervelocity impact". United States. doi:10.1063/1.4960297.
@article{osti_22599926,
title = {Flash characteristics of plasma induced by hypervelocity impact},
author = {Zhang, Kai and Beijing Automotive Technology Center, Beijing 100021 and Long, Renrong, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn and Zhang, Qingming, E-mail: longrenrong@bit.edu.cn, E-mail: qmzhang@bit.edu.cn and Xue, Yijiang and Ju, Yuanyuan},
abstractNote = {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.},
doi = {10.1063/1.4960297},
journal = {Physics of Plasmas},
number = 8,
volume = 23,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}