التفاصيل البيبلوغرافية
| العنوان: |
Development of a three-stage gas gun launcher for ultrahigh-pressure Hugoniot measurements. |
| المؤلفون: |
Wang, Xiang, Dai, Chengda, Wang, Qingsong, Hao, Long, Bai, Jinsong, Yu, Yuying, Wu, Qiang, Tan, Hua, Hu, Jianbo, Luo, Guoqiang, Shen, Qiang, Zhang, Lianmeng |
| المصدر: |
Review of Scientific Instruments; Jan2019, Vol. 90 Issue 1, pN.PAG-N.PAG, 6p, 1 Color Photograph, 3 Diagrams, 2 Charts, 4 Graphs |
| مصطلحات موضوعية: |
TANTALUM, TRANSITION metals, CASCADE impactors (Meteorological instruments), SHOCK waves, SYMMETRIC functions, LASER fusion |
| مستخلص: |
A three-stage gas gun, composed of a two-stage gas gun and the add-on part, has been developed to launch high-Z (tantalum, for example) flyer plates up to 10 km/s for ultrahigh-pressure Hugoniot measurements. Great care has been taken to optimize the add-on part in which a specially designed graded density impactor is employed to quasi-isentropically accelerate the high-Z flyer plate for maximizing its impact velocity. The shock wave in the target generated by the flyer plate is characterized with the flatness of the shock-front better than 1 ns in the concerned area and the uncertainty of the shock-wave velocity less than 2%, thus satisfying the requirements for high-precision Hugoniot measurements. As a demonstration, we measured the ultrahigh-pressure Hugoniot equation of state of tantalum ranging from 0.45 TPa to 0.85 TPa with a symmetric impacting geometry in which the shock-wave velocity and the particle velocity are simultaneously determined. The results obtained are well consistent with data available in the literature, indicating the extended capability of the gas-gun launcher technique. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
