A collaboration between DESY, PSI and CERN has developed and built an advanced modular $X$-band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. The prototype of the novel $X$-band TDS, the polarizable $X$-band (PolariX) TDS, was fabricated at PSI following the high-precision tuning-free production process developed for the C-band Linac of the SwissFEL project. Bead-pull rf measurements were also performed at PSI to verify, in particular, that the polarization of the dipole fields does not have any rotation along the structure. The high-power test was performed at CERN and now the TDS is at DESY and has been installed in the FLASHForward beamline, where the first streaking experience with beam has been accomplished. We summarize in this paper the rf design of the TDS and its key components, such as the $X$-band pulse compressor, E-rotator, and phase shifter, the results of the bead-pull measurements and the high power test and finally the rf setup at DESY.

中文翻译：

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可变极化的新型X波段横向偏转结构

DESY，PSI和CERN之间的合作开发并构建了高级模块 $X$带横向偏转结构（TDS）系统，其新功能是提供偏转力的可变极化。小说的原型$X$频段TDS，可极化 $X$波段（PolariX）TDS是在PSI上制造的，它遵循为SwissFEL项目的C波段直线加速器开发的高精度免调谐生产工艺。还在PSI上进行了磁珠拉动rf测量，以特别验证偶极场的极化沿结构没有任何旋转。高功率测试是在CERN进行的，现在TDS在DESY，并已安装在FLASHForward光束线中，在此完成了光束的首次划线经验。我们在本文中总结了TDS的射频设计及其关键组件，例如$X$带脉冲压缩器，E旋转器和移相器，磁珠拉力测量和高功率测试的结果，最后是DESY的RF设置。