束流损伤机理及其计算
Beam-Induced Damage Mechanisms and their Calculation
摘要:
高能粒子束与物质的快速相互作用在受冲击部件中引起动态响应。如果束脉冲足够强,则可以达到极端条件,例如非常高的压力、材料密度的变化、相变、强应力波、材料破碎和爆炸。即使在较低的强度和较长的时间尺度下,也可能引起显著的影响,例如振动、大振荡和受冲击部件的永久变形。这些讲座介绍了由粒子束和固体之间的相互作用引起的热机械现象的机制,以及可用于评估受影响部件的响应的分析和数值方法。这种设备的设计原理的概述,还提供了材料选择指南和实验测试,需要验证材料和组件暴露于高能粒子束的相互作用的描述。
英文摘要:
The rapid interaction of highly energetic particle beams with matter induces dynamic responses in the impacted component. If the beam pulse is sufficiently intense, extreme conditions can be reached, such as very high pressures, changes of material density, phase transitions, intense stress waves, material fragmentation and explosions. Even at lower intensities and longer time-scales, significant effects may be induced, such as vibrations, large oscillations, and permanent deformation of the impacted components. These lectures provide an introduction to the mechanisms that govern the thermomechanical phenomena induced by the interaction between particle beams and solids and to the analytical and numerical methods that are available for assessing the response of impacted components. An overview of the design principles of such devices is also provided, along with descriptions of material selection guidelines and the experimental tests that are required to validate materials and components exposed to interactions with energetic particle beams.
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