Stripline kickers are commonly used for on-axis injection in the low emittance rings. The beam coupling impedances of the kickers normally show large contributions to the total impedance budget. In the High Energy Photon Source, the necessity of the short pulse bottom width (less than 10 ns) and strong deflection field requires the kicker to have a short length and a small gap between the electrodes, respectively. A new five-cell stripline kicker is proposed in order to save longitudinal space as well as to reduce the beam coupling impedance. Comprehensive studies have been undertaken to characterize the impedance of the stripline kicker. The beam coupling impedance and heat load dissipation on the kicker due to the beam passage are studied numerically. Strategies to further reduce the impedance are discussed. In addition, impedance bench measurements are launched to identify the impedance of the kicker experimentally. The longitudinal beam coupling impedance is measured with different terminations by using coaxial wire method. A satisfactory agreement has been reached between the numerical predictions and the measurements. A novel fasten block design with ceramic is proposed for the wire stretching and the center holding of the inner conductor in a small beam pipe.

中文翻译：

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注射带状线喷射器的阻抗优化和测量

带状线踢球器通常用于低发射率环中的轴向注入。踢脚的光束耦合阻抗通常显示出对总阻抗预算的很大贡献。在高能光子源中，短脉冲底部宽度（小于10 ns）和强偏转场的必要性要求跳线器分别具有短的长度和电极之间的小间隙。为了节省纵向空间并减小光束耦合阻抗，提出了一种新的五单元带状线踢腿器。已经进行了全面的研究来表征带状线踢脚的阻抗。数值研究了射束通过时射束上的射束耦合阻抗和热负荷消散。讨论了进一步降低阻抗的策略。此外，进行阻抗台架测量，以通过实验确定踢腿的阻抗。纵向光束耦合阻抗是使用同轴线法在不同终端处测量的。在数值预测和测量之间已达成令人满意的协议。提出了一种新颖的陶瓷紧固块设计，用于在小束管中进行导线拉伸和内部导体的中心固定。