Channeling and Photon Emission of Electrons in Crystalline Undulators

该项目旨在对电子基晶体波动体中形成的辐射进行全面的理论和数值研究。虽然到目前为止，只有基于正电子的晶体波动器被认为是一种可行的装置，但最近的研究表明，在周期性弯曲的晶体中，超相对论电子的平面通道也适用于在硬x射线和伽马射线范围内产生具有窄光谱分布的强辐射。分析将在广泛的电子能量范围内进行（从几十MeV到几十GeV），用于各种晶体和平面，以及各种形状的周期性弯曲通道。在1 GeV以下的能量范围内，通道电子的量子动力学变得非常重要。我们计划与美因茨大学的小组密切合作，他们将在与当前提案同时提交给DFG的项目框架内对这一现象进行实验调查。我们期望一个坚实而严谨的电子基波动器理论的发展将清楚地证明该装置的可行性，并将刺激进一步的实验和技术活动。

The project aims to carry out a comprehensive theoretical and numerical study of the radiation formed in an electron-based crystalline undulator. Although only a positron-based crystalline undulator was considered to be a feasible device so far, it was recently shown that also planar channeling of ultra-relativistic electrons in a periodically bent crystal is suitable for generating of powerful radiation with a narrow spectral distribution in the hard x-ray and gamma-ray range. The analysis will be carried out over wide range of electron energies (from tens of MeV up to tens of GeV), for various crystals and planes, and for various shapes of the periodically bent channels. A special attention will be paid to the energy range below 1 GeV were quantum dynamics of channeling electrons becomes important. We are planning to work in close collaboration with the group from Mainz University who will carry out experimental investigation of the phenomenon within the framework of the project submitted to DFG simultaneously with the current proposal. We expect that the development of a solid and rigorous theory of the electron-based undulator will clearly demonstrate the feasibility of this device and will stimulate further experimental and technologicalactivity.