【摘要】：通過改變Z箍縮負(fù)載的初始形狀和/或質(zhì)量密度分布,可以實現(xiàn)等離子體的準(zhǔn)球形聚心內(nèi)爆.同柱形箍縮相比,準(zhǔn)球形電磁內(nèi)爆可以將內(nèi)爆動能集中加載至負(fù)載中心較小的空間區(qū)域內(nèi),獲得更高的能量密度,從而在驅(qū)動Z箍縮動態(tài)黑腔實現(xiàn)聚變點火方面具有潛在優(yōu)勢.準(zhǔn)球形電磁內(nèi)爆的負(fù)載和電極結(jié)構(gòu)比柱形Z箍縮更復(fù)雜,球面收縮的幾何特點使其內(nèi)爆動力學(xué)過程和能量定標(biāo)關(guān)系顯著區(qū)別于柱形內(nèi)爆.本文利用解析的薄殼模型推導(dǎo)并分析了理想條件下準(zhǔn)球形電磁內(nèi)爆的動力學(xué)行為和能量定標(biāo)關(guān)系,并同二維磁流體力學(xué)模擬結(jié)果進(jìn)行了比較.與柱形Z箍縮內(nèi)爆相比,準(zhǔn)球形電磁內(nèi)爆的動能不僅與驅(qū)動電流有關(guān),而且敏感地依賴于負(fù)載的初始尺寸.在不顯著降低驅(qū)動電流和內(nèi)爆品質(zhì)的前提下,適當(dāng)增加負(fù)載的初始半徑和最大緯度,有利于獲得更多的內(nèi)爆動能和能量加載密度.
[Abstract]:By changing the initial shape and / or mass density distribution of the Z-pinch load, the quasi-spherical core implosion of the plasma can be realized. Compared with cylindrical pinch, quasi-spherical electromagnetic implosion can concentrate the implosion kinetic energy into the space region with smaller load center and obtain higher energy density, which has potential advantages in driving Z-pinch dynamic black cavity to achieve fusion ignition. The loading and electrode structure of quasi-spherical electromagnetic implosion are more complex than that of cylindrical Z-pinch. The geometric characteristics of spherical contraction make the dynamic process of implosion and the energy calibration relationship of spherical implosion distinct from cylindrical implosion. In this paper, the dynamic behavior and energy calibration of quasi-spherical electromagnetic implosion under ideal conditions are derived and analyzed by using the analytical thin shell model, and the results are compared with the results of two-dimensional magnetohydrodynamic simulation. Compared with the cylindrical Z-pinch implosion, the kinetic energy of the quasi-spherical electromagnetic implosion is not only dependent on the driving current, but also sensitively depends on the initial size of the load. Without significantly reducing the driving current and implosion quality, increasing the initial radius and maximum latitude of the load is beneficial to obtain more implosion kinetic energy and energy loading density.
【作者單位】： 北京應(yīng)用物理與計算數(shù)學(xué)研究所;中國工程物理研究院核物理與化學(xué)研究所;
【基金】：國家自然科學(xué)基金(批準(zhǔn)號:11405012,91330107,11275030,11675025) 國防基礎(chǔ)科研計劃(批準(zhǔn)號:B1520133015) 中國工程物理研究院院長基金(批準(zhǔn)號:2014-1-042)資助的課題~~
【分類號】：O361.3;O441

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本文編號：2213443