Upgrade of low-level RF system for J-PARC linac RFQ-TS

Abstract The Radio-Frequency Quadrupole Test Stand (RFQ-TS) was prepared for conditioning the spare RFQ in the Japan Proton Accelerator Research Complex (J-PARC) linac. Additionally, the RFQ-TS is used for the development of accelerator components and the acquisition of beam parameters. The digital feedback system of the Low-Level RF in the RFQ-TS previously used the discontinued cPCI system, which had been in use for 20 years since its development. In order to continue improvements of the RFQ-TS and to allow for future development, the system has been upgraded to use a micro telecommunications computing architecture.4 - based system, which can be developed further. This paper reports the details of the upgrade, along with the feedback and feedforward adjustments.