A 10 MeV, 3 kW RF electron linear accelerator ( linac )is in operation at EBC, Kharghar. A new horizontal linac rated for 10 MeV, 5 kW has been planned to be developed at EBC, Kharghar. The components of 10 MeV linac beam line consists of electron gun, a standing wave (SW) single cell pre-buncher cavity and a SW main linac cavity of length 0.9 m. In order to enhance the beam capture efficiency and to reduce the energy spread a pre-buncher cavity along with focusing elements will be introduced between the electron gun and the main linac cavity section. In this work the design simulation, fabrication, RF measurements and beam experimental trials of the 2856 MHz low Q, wide band pre-buncher cavity is presented. The measured RF parameters of pre-buncher cavity are $f_0=2854.4$ MHz in air, $Q_{\mathrm{L}}=600$, tuning range $\pm$2.5 MHz. Electron beam transmission efficiency of 99% is achieved with minimum relative bunch length obtained at 400W of input RF power.

一台 10 MeV、3 kW 的射频电子直线加速器 (linac) 正在 Kharghar 的 EBC 运行。已计划在 Kharghar 的 EBC 开发额定功率为 10 MeV、5 kW 的新型水平直线加速器。10 MeV 直线加速器束线的组成部分包括电子枪、驻波 (SW) 单电池预聚束腔和长度为 0.9 m 的 SW 主直线加速器腔。为了提高束捕获效率并减少能量传播，将在电子枪和主直线加速器腔部分之间引入预聚束腔和聚焦元件。在这项工作中，介绍了 2856 MHz 低 Q、宽带预聚束腔的设计模拟、制造、RF 测量和波束实验试验。测得的预聚束腔射频参数为$F_0=2854.4$ 空气中的兆赫兹， ${问}_{\mathrm{升}}=600$, 调谐范围 $\pm$2.5 兆赫。在 400W 输入射频功率下获得的最小相对束长可实现 99% 的电子束传输效率。