Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

Control applications targeting fast industrial processes rely on real-time feasible implementations. One of such applications is the stabilization of an electron bunch arrival time in the context of a linear accelerator. In the past, only the electric field accelerating the electron bunches was actively controlled in order to implicitly stabilize the accelerated electron beam. Nowadays, beam properties are specifically measured at a target position and then stabilized by a dedicated feedback loop acting on the accelerating structures. This dedicated loop is usually referred to as a beam-based feedback. Following this, the control system at the linear accelerator ELBE is planned to be upgraded by the beam-based feedback, and the problem of implementing a designed control algorithm becomes highly relevant. In this work, we propose an FPGA-based real-time feasible implementation of a high-order H2 regulator. By presenting the results of the corresponding VHDL simulation and hardware synthesis, we show that the proposed digital solution is fast enough to cover the bunch repetition rates frequently used at ELBE, such as 100 kHz. Finally, we verify the implementation by using a dedicated FPGA testbench.