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Target-Plasma Expansion Induced by 20-MeV Intense Electron Beam

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5 Author(s)
Jun Zhu ; Inst. of Fluid Phys., China Acad. of Eng. Phys., Mianyang, China ; Haijun Yu ; Xiaoguo Jiang ; Nan Cheng
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The typical response of an X-ray converter material to the passage of a high-current relativistic electron beam is ionization and rapid dispersal. Experiments have been performed on the Dragon-I linear induction accelerator to study this phenomenon. In this paper, we report the fast photography and Faraday cup experiments performed to quantify the plasma-plume expansion and velocities of ions. Monte Carlo simulation shows that the energy deposition in a multilayer target is about 7 kJ/g. By solving the Saha equation, the ionization degree of the plasma was figured out to be only 14%.

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Plasma Science, IEEE Transactions on  (Volume:38 ,  Issue: 10 )