Digital Accelerator based on the Induction Acceleration Method

在改造后的KEK 500 MeV助推器同步加速器中引入感应加速系统，实现了小型感应同步加速器KEK数字加速器。通过感应加速，将注入能量为200kev的氦-1+束流加速到12mev。构建了一种永磁体x波段ECR离子源，其后是一个Einzel透镜斩波器，能够以期望脉冲长度的矩形脉冲轮廓输送各种离子束。离子束被注入到环中，被一对势垒电压脉冲捕获，并用脉冲电压脉冲加速。这些脉冲是在感应加速细胞中产生的。采用基于FPGA的数字控制系统对感应加速度系统的运行进行了全面控制。

The KEK digital accelerator, which is a small scale induction synchrotron no employing any injector, has been realized, introducing the induction acceleration system into the reformed KEK 500 MeV Booster synchrotron. A He-1+beam has been accelerated from the injection energy of 200 keV to 12 MeV by induction acceleration. A permanent magnet x-band ECR ion source followed by an Einzel lens chopper capable of delivering various ion beams with a rectangular pulse profile of a desired pulse length was constructed. The ion beam is injected into the ring and captured by a pair of barrier voltage pulses and accelerated with pulse voltage pulses. These pulses are generated in induction acceleration cells. The operation of the induction acceleration system was fully maneuvered by the digital control system based on a FPGA.