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Research Articles|2 Article(s)
Experimental investigation of the reaction-build-up for plastic bonded explosive JOB-9003
Xu Zhang, Yanfei Wang, Feng Zhao, Rong Zhang, and Bin Zhong
In order to measure the shock initiation behavior of JOB-9003 explosives, Al-based embedded multiple electromagnetic particle velocity gauge technique has been developed. In addition, a gauge element called the shock tracker has been used to monitor the progress of the shock front as a function of time, thus providing a positionetime trajectory of the wave front as it moves through the explosive sample. the data is used to determine the position and time for shock to detonation transition. All the experimental results show that the rising-up time of Al-based electromagnetic particle velocity gauge is very short (<20 ns); the reaction-build-up velocity pro.les and the positionetime for shock to detonation transition of HMX-based plastic bonded explosive (PBX) JOB-9003 with 1-8 mm depth from the origin of the impact plane under different initiation pressures were obtained with high accuracy. In order to measure the shock initiation behavior of JOB-9003 explosives, Al-based embedded multiple electromagnetic particle velocity gauge technique has been developed. In addition, a gauge element called the shock tracker has been used to monitor the progress of the shock front as a function of time, thus providing a positionetime trajectory of the wave front as it moves through the explosive sample. the data is used to determine the position and time for shock to detonation transition. All the experimental results show that the rising-up time of Al-based electromagnetic particle velocity gauge is very short (<20 ns); the reaction-build-up velocity pro.les and the positionetime for shock to detonation transition of HMX-based plastic bonded explosive (PBX) JOB-9003 with 1-8 mm depth from the origin of the impact plane under different initiation pressures were obtained with high accuracy.
Matter and Radiation at Extremes
- Publication Date: Jan. 01, 2017
- Vol. 2, Issue 3, 139 (2017)
Investigation of Al plasmas from thin foils irradiated by high-intensity extreme ultraviolet
E.V. Grabovski, P.V. Sasorov, A.P. Shevelko, V.V. Aleksandrov, S.N. Andreev, M.M. Basko, A.V. Branitski, A.N. Gritsuk, G.S. Volkov, Ya.N. Laukhin, K.N. Mitrofanov, G.M. Oleinik, A.A. Samokhin, V.P. Smirnov, I.Yu. Tolstikhinac, I.N. Frolov, and O.F. Yakushev
Dynamics and spectral transmission of Al plasma produced by extreme ultraviolet (EUV) irradiation of 0.75-mm thick Al foil is investigated. the EUV radiation with the peak power density in the range of 0.19-0.54 TW/cm2 is provided by Z-pinch formed by W multiwire array implosion in the Angara-5-1 facility. Geometry of the experiment ensures that there are no plasma fluxes from the pinch toward the Al foil and plasma. the same EUV source is used as a back illuminator for obtaining the absorption spectrum of Al plasma in the wavelength range of 5-24 nm. It comprises absorption lines of ions Al4+, Al5+, Al6+, Al7+. Analysis of relative intensities of the lines shows that those ions are formed in dense Al plasma with a temperature of ~20 eV. Dynamics of Al plasma has been investigated with transverse laser probing. We have also performed radiation-gas-dynamics simulations of plasma dynamics affected by external radiation, which includes self-consistent radiation transport in a plasma shell. the simulations show good agreement with an experimental absorption spectrum and with experimental data concerning plasma dynamics, as well as with the analysis of line absorption spectrum. this confirms the correctness of the physical model underlying these simulations. Dynamics and spectral transmission of Al plasma produced by extreme ultraviolet (EUV) irradiation of 0.75-mm thick Al foil is investigated. the EUV radiation with the peak power density in the range of 0.19-0.54 TW/cm2 is provided by Z-pinch formed by W multiwire array implosion in the Angara-5-1 facility. Geometry of the experiment ensures that there are no plasma fluxes from the pinch toward the Al foil and plasma. the same EUV source is used as a back illuminator for obtaining the absorption spectrum of Al plasma in the wavelength range of 5-24 nm. It comprises absorption lines of ions Al4+, Al5+, Al6+, Al7+. Analysis of relative intensities of the lines shows that those ions are formed in dense Al plasma with a temperature of ~20 eV. Dynamics of Al plasma has been investigated with transverse laser probing. We have also performed radiation-gas-dynamics simulations of plasma dynamics affected by external radiation, which includes self-consistent radiation transport in a plasma shell. the simulations show good agreement with an experimental absorption spectrum and with experimental data concerning plasma dynamics, as well as with the analysis of line absorption spectrum. this confirms the correctness of the physical model underlying these simulations.
Matter and Radiation at Extremes
- Publication Date: Jan. 01, 2017
- Vol. 2, Issue 3, 129 (2017)
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