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- Title
A compact platform for the investigation of material dynamics in quasi-isentropic compression to ~ 19 GPa.
- Authors
Lu, Yu; Chen, Kaiguo; Cheng, Cheng; Zhou, Zhongyu; Luo, Binqiang; Chen, Xuemiao; Zhang, Xuping; Wang, Guiji; Tan, Fuli; Zhao, Jianheng; Gu, Zhuowei; Sun, Chengwei
- Abstract
This paper reports on the development of a magnetically driven high-velocity implosion experiment conducted on the CQ-3 facility, a compact pulsed power generator with a load current of 2.1 MA. The current generates a high Lorentz force between inner and outer liners made from 2024 aluminum. Equally positioned photonic Doppler velocimetry probes record the liner velocities. In experiment CQ3-Shot137, the inner liner imploded with a radial converging velocity of 6.57 km/s while the outer liner expanded at a much lower velocity. One-dimensional magneto-hydrodynamics simulation with proper material models provided curves of velocity versus time that agree well with the experimental measurements. Simulation then shows that the inner liner underwent a shock-less compression to approximately 19 GPa and reached an off-Hugoniot high-pressure state. According to the scaling law that the maximum loading pressure is proportional to the square of the load current amplitude, the results demonstrate that such a compact capacitor bank as CQ-3 has the potential to generate pressure as high as 100 GPa within the inner liner in such an implosion experiment. It is emphasized that the technique described in this paper can be easily replicated at low cost.
- Subjects
DOPPLER velocimetry; CAPACITOR banks; LORENTZ force; MAGNETOHYDRODYNAMICS; VELOCITY
- Publication
Scientific Reports, 2021, Vol 11, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-021-99479-3