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	Destruction study of tantalum target impacted by 12 MeV electron beam
	Long Ji-Dong ; Lin Yu-Zheng ; Luo Fei ; Gu Zhuo-Wei ; Shi Jin-Shui
	2010-05-06 ; 2010-05-06
关键词	Experimental Theoretical or Mathematical/ electron beam effects fracture mechanics Monte Carlo methods scanning electron microscopy shock wave effects tantalum/ tantalum target electron beam radiation destructive appearance lower energy electron X-ray strong penetrating ability fracture profiles scanning electron microscope mechanical tear symmetrical tear fracture energy deposit Monte-Carlo simulation target expansion thermal shock waves target free surfaces wave reflection rarefaction waves bremsstrahlung target 1.2 mm Ta/ A6180F Electron and positron effects A8140N Fatigue, embrittlement, and fracture A6220M Fatigue, brittleness, fracture, and cracks A6250 High-pressure and shock-wave effects in solids and liquids/ size 1.2E-03 m/ Ta/el
中文摘要	The radiation destructive appearance caused by intensive electron beam current with 12 MeV energy reveals different mechanism of fracture from those caused by lower energy electron or X-ray due to the strong penetrating ability of the electron. In the paper, the fracture profiles of the 1.2 mm Ta target, which is destructed by 12 MeV electron beam, are studied using microscope and scanning electron microscope. The result indicates mechanical tear is the major reason, and moreover, the tear fracture is almost symmetrical. In order to understand this, the energy deposit of electron beam along the depth of the target is given out by Monte-Carlo simulation, which is also symmetrical and higher in center, lower in sides. A preliminary conclusion on the major destructing mechanism of the target is drawn out: 12 MeV electron beam, which has strong penetration ability, can heat the whole target almost at the same time. The expansion of the center part of the target is constrained by the boundary which results in two shock waves with most destructive power produced in the two sides of center. After the shock waves reach the free surfaces of the target, by wave reflection, two rarefaction waves will propagate inward, then symmetric tearing happens when the two waves meet at the center region of the target.
语种	中文 ; 中文
出版者	Science Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/10632]
专题	清华大学
推荐引用方式 GB/T 7714	Long Ji-Dong,Lin Yu-Zheng,Luo Fei,et al. Destruction study of tantalum target impacted by 12 MeV electron beam[J],2010, 2010.
APA	Long Ji-Dong,Lin Yu-Zheng,Luo Fei,Gu Zhuo-Wei,&Shi Jin-Shui.(2010).Destruction study of tantalum target impacted by 12 MeV electron beam..
MLA	Long Ji-Dong,et al."Destruction study of tantalum target impacted by 12 MeV electron beam".(2010).

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