Electron bunch profile reconstruction based on phase-constrained iterative algorithm
Electron bunch profile reconstruction based on phase-constrained iterative algorithm
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DOI：
10.1103/physrevaccelbeams.19.032801
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发表时间：
2016-03
影响因子：
1.7
通讯作者：
F. B. Taheri;I. Konoplev;G. Doucas;Peter J. Baddoo;R. Bartolini;J. Cowley;S. Hooker
中科院分区：
文献类型：
--
作者：
F. B. Taheri;I. Konoplev;G. Doucas;Peter J. Baddoo;R. Bartolini;J. Cowley;S. Hooker
相位恢复问题发生在物理学的许多领域，是持续调查的主题。一维情况，例如，带电粒子束的时间轮廓的重建对于粒子加速器是特别具有挑战性和重要的。准确了解束流的纵向（时间）轮廓对于直线对撞机、韦克菲尔德加速器和下一代光源（包括X射线SASE自由电子激光）都是非常重要的。经常使用的方法，例如，如果Blaschke相位贡献可忽略，则最小相位恢复或其它迭代算法是可靠的。然而，这既不是先验已知的，也不能假定适用于任意的聚束轮廓。我们提出了一种新的方法，它提供了可重复的，最可能的和稳定的重建聚束配置文件（人工和实验），否则将仍然无法解决现有的技术。
The phase retrieval problem occurs in a number of areas in physics and is the subject of continuing investigation. The one-dimensional case, e.g., the reconstruction of the temporal profile of a charged particle bunch, is particularly challenging and important for particle accelerators. Accurate knowledge of the longitudinal (time) profile of the bunch is important in the context of linear colliders, wakefield accelerators and for the next generation of light sources, including x-ray SASE FELs. Frequently applied methods, e.g., minimal phase retrieval or other iterative algorithms, are reliable if the Blaschke phase contribution is negligible. This, however, is neither known a priori nor can it be assumed to apply to an arbitrary bunch profile. We present a novel approach which gives reproducible, most-probable and stable reconstructions for bunch profiles (both artificial and experimental) that would otherwise remain unresolved by the existing techniques.