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arXiv 1301.4491physics.acc-phcond-mat.mtrl-sci
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应变层晶体波荡器

Strained Layer Crystalline Undulator

Andriy Kostyuk

摘要:

超相对论性带电粒子在周期性弯曲晶面的晶体中被引导时,会发出波荡器型的硬电磁辐射。最近提出的晶体波荡器的弯曲振幅小于弯曲平面之间的距离和弯曲周期短于沟道振荡的周期是远远优于以前提出的。同时,从技术角度来看,它更具挑战性,因为它的弯曲周期必须在亚微米范围内。结果表明,适当改变锗含量的硅锗混晶可以具有必要的弯曲参数。此外,预计它是稳定的,对失配位错。

英文摘要:

Ultrarelativistic charged particles are predicted to emit hard electromagnetic radiation of undulator type while being channeled in a crystal with periodically bent crystallographic planes. The recently proposed crystalline undulator with the bending amplitude smaller than the distance between the bent planes and the bending period shorter than the period of channeling oscillations is far superior to what was proposed previously. In the same time, it is more challenging from the technical point of view because its bending period has to be in the sub-micron range. It is shown that a mixed crystal of silicon-germanium with properly varying germanium fraction can have the necessary bending parameters. Moreover, it is predicted to be stable against misfit dislocations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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