Progress of Diamond Digital Low Level RF

TL;DR

This paper reports the development and deployment of multiple digital low level RF systems at Diamond Light Source, demonstrating successful operation in controlling RF cavities in the storage ring, booster, and Linac, with a focus on platform unification for future upgrades.

Contribution

It introduces a new common platform for digital RF control systems across Diamond facilities, including the storage ring, booster, and Linac, with successful testing and deployment.

Findings

Six systems built and operational in Diamond facilities.

Successful testing of Linac RF system with arbitrary waveform generator.

New platform designed for future Diamond II upgrades.

Abstract

The first version of digital low level RF (DLLRF) for the Diamond Light Source storage ring and booster was developed with ALBA Synchrotron. Six systems have been built so far. Two of them are in routine operation controlling two normal conducting HOM-damped cavi-ties in the Diamond storage ring. A third system is being used for cavity testing in the RF test facility (RFTF). The fourth system is being commissioned to control the sec-ond normal conducting booster cavity. The fifth DLLRF system is being prepared for the third normal conducting RF cavity in the storage ring. A new DLLRF system based on SIS8300-KU with RTM has been developed and tested in the last few years. We are aiming to develop a common platform for the differ-ent RF systems in Diamond, including the storage ring, the booster and the Linac. It will also be our baseline design for the future Diamond II. Firmware, software and supporting hardware have been developed and tested. The Linac version with arbitrary waveform generator mode was tested successfully to generate flat top pulse from SLED in the high power test in the Linac. The stor-age ring version was also tested successfully in RFTF.