在DESY的SINBAD设施上使用一种新的X波段横向偏转结构的纵向相空间重构模拟研究
Longitudinal phase space reconstruction simulation studies using a novel X-band transverse deflecting structure at the SINBAD facility at DESY
摘要：
横向偏转结构（TDS）是用于表征直线加速器中的电子聚束的纵向特性的公知装置。这种腔的标准使用涉及沿着横向轴线对束进行划线，并分析下游屏幕上的图像，以找到沿着另一横向轴线的束长度和切片特性。一种新的X波段偏转结构，它将允许偏转场的偏振进行调整，目前正在设计作为欧洲核子研究中心，DESY和PSI之间的合作的一部分。这种新的设计将允许聚束在腔内以任何横向角度条纹化，这将开辟新的测量技术的可能性，这些技术可以结合起来表征聚束的6D相空间分布。本文提出了一种利用TDS和偶极子相结合的方法来重建聚束团的纵向相空间分布。模拟这种技术的SINBAD-ARES光束线的时间分辨率和诱导的能量扩展相关的关键限制进行了讨论。
英文摘要：
A transverse deflecting structure (TDS) is a well-known device for characterizing the longitudinal properties of an electron bunch in a linear accelerator. The standard use of such a cavity involves streaking the bunch along a transverse axis and analysing the image on a screen downstream to find the bunch length and slice properties along the other transverse axis. A novel X-band deflecting structure, which will allow the polarization of the deflecting field to be adjusted, is currently being designed as part of a collaboration between CERN, DESY and PSI. This new design will allow bunches to be streaked at any transverse angle within the cavity, which will open up the possibility of new measurement techniques, which could be combined to characterize the 6D phase space distribution of bunches. In this paper, a method is presented for reconstructing the longitudinal phase space distribution of bunches by using the TDS in combination with a dipole. Simulations of this technique for the SINBAD-ARES beamline are presented and the key limitations related to temporal resolution and induced energy spread are discussed.
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