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等離子體加速器動力學(xué)理論探索

Dynamics of plasma driven micro-particle accelerator

  • 摘要: 等離子體驅(qū)動微小碎片加速器是利用大容量脈沖電容器組對等離子體同軸槍放電產(chǎn)生高溫、高密度、高速等離子體，再用這些等離子體加速微粒（10～1 000 μm）至超高速（1～15 km/s）以模擬mm級以下空間碎片撞擊效應(yīng)的地面試驗(yàn)裝置。為了提高微粒速度，需要增加等離子體的動量，而等離子體的動量與工作氣體的性質(zhì)及定向速度密切相關(guān)。文章用數(shù)值模擬及解析計(jì)算等理論方法來探索等離子體軸向速度、密度和溫度與放電條件、加速電極參數(shù)和工作氣體之間的關(guān)系。通過研究等離子體束與微粒間相互作用的動力學(xué)行為，尋求優(yōu)化試驗(yàn)裝置效率的有效途徑。

     

    Abstract: The plasma driven micro-particle accelerator is a ground device to produce high temperature, high density, high speed plasma to accelerate small particles (10～1 000 μm) to hypervelocity (1～15 km/s), for simulating the impact effects of space debris of micron scale. First of all, a high momentum of the plasma is required for the speed of the particles, and it is closely related to the nature of the working gas and the beam velocity. Numerical simulations and theoretical analysis were carried out to explore the relationships among plasma properties, discharge conditions, electrode configurations and the working gas. Furthermore, the efficiency of the experimental device is optimized by considering the dynamic behavior of the interaction between the plasma beam and the particles.

     

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