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本文利用LARED-S程序模拟了等密度和等压力条件下压缩氘氚球的热核反应燃烧过程.对于等密度模型,模拟了两个具体算例,与国外计算结果进行了比较,验证了程序的可靠性.对于等压力模型,利用数值模拟给出了热核反应燃烧与压缩氘氚球初始状态之间的关系曲线,分析发现,氘氚装量、压力和主燃料密度的增加有利于提高热核反应放能和燃耗,中心热斑的温度和面密度分别达到70—80 MK和3—4 kg·m-2时热核反应才有显著的放能,提高主燃料密度,可以适当放宽对中心热斑的点火要求.最后对实际点火靶进行了数值模拟并且与等压力模拟计算结果进行了比较分析.The thermonuclear burn characteristics of compressed deuterium-tritium microspheres are simulated with LARED-S code based on the isochoric and isobaric models. Two examples of the isochoric model are simulated and compared with the other present data for validating the LARED-S code. For the isobaric model, numerical results characterizing the thermonuclear burn for a broad range of initial conditions are presenteal. It is shown that the yield and burn-up fraction increase with the total fuel mass, pressure and main-fuel density. It is necessary for the hot-spot to reach temperatures up to 70 to 80 MK and areal density 3 to 4 kg· m-2 to obtain considerable fusion energy. If the main-fuel density is increased high enough, the hot-spot condition for ignition could be broadened to a lower limit. Finally, the results of the isobaric model are compared with those of the actual ignition targets simulated with the LARED-S code.
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Keywords:
- compressed deuterium-tritium microsphere /
- isochoric model /
- isobaric model /
- thermonuclear fusion
[1] ［1］Lindl J D 1995 Phys. Plasma 2 3933
[2] ［2］Lindl J D, Amendt P, Berger R L, Glendinning S G, Glenzer S H, Haan S W, Kauffman R L, Landen O L, Suter L J 2004 Phys. Plasma 11 340
[3] ［3］Wu J F, Ye W H, Zhang W Y 2003 High Power Laser Part. Beams 15 64 (in Chinese) ［吴俊峰、叶文华、张维岩 2003 强激光与粒子束 15 64］
[4] ［4］Wu J F, Ye W H, Zhang W Y 2005 High Power Laser Part. Beams 17 373 (in Chinese) ［吴俊峰、叶文华、张维岩 2005 强激光与粒子束 17 373］
[5] ［5］Kidder R E 1976 Nucl. Fusion 16 405
[6] ［6］Meyer-Ter-Vehn J 1982 Nucl. Fusion 22 561
[7] ［7］Fraley G S, Linnebur E J, Mason R J, Morse R L 1974 Phys. Fluids 17 474
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[1] ［1］Lindl J D 1995 Phys. Plasma 2 3933
[2] ［2］Lindl J D, Amendt P, Berger R L, Glendinning S G, Glenzer S H, Haan S W, Kauffman R L, Landen O L, Suter L J 2004 Phys. Plasma 11 340
[3] ［3］Wu J F, Ye W H, Zhang W Y 2003 High Power Laser Part. Beams 15 64 (in Chinese) ［吴俊峰、叶文华、张维岩 2003 强激光与粒子束 15 64］
[4] ［4］Wu J F, Ye W H, Zhang W Y 2005 High Power Laser Part. Beams 17 373 (in Chinese) ［吴俊峰、叶文华、张维岩 2005 强激光与粒子束 17 373］
[5] ［5］Kidder R E 1976 Nucl. Fusion 16 405
[6] ［6］Meyer-Ter-Vehn J 1982 Nucl. Fusion 22 561
[7] ［7］Fraley G S, Linnebur E J, Mason R J, Morse R L 1974 Phys. Fluids 17 474
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