Speaker
Description
A digital LLRF system [1] has been successfully developed and deployed for control of the accelerating Voltages on the Ferrite loaded RF cavities on the ISIS Synchrotron over the last decade. The final stage of the digital control system has recently been completed which now includes digital control of the cavity tuning.
Similar National Instruments FPGA modules to those used in the Synchrotron LLRF system have been used to develop a LLRF control system for the RAL Front End Test Stand (FETS) [2] and the ISIS Pre-Injector Test Stand (PITS) [3]. These systems are based on the digital LLRF system developed at the University of the Basque Country [4].
The RF system on FETS comprises of a Radiofrequency Quadrupole (RFQ) and 3 re-bunching cavities operating at 324MHz. That for PITS consists of an RFQ and 4 quarter wave resonator cavities all operating at 202.5MHz and is intended as a pre-cursor to the upgrade of the ISIS Pre-Injector planned for 2027, when the same LLRF control system will also be deployed on the 4 LINAC tanks and de-bunching cavity. Initial tests of the LLRF system have been made on one of the QWR cavities and both RFQs and will be continued as more cavities become available.
- “Status of the ISIS Synchrotron Digital LLRF System” Seville et al,
LLRF 2022. - “Status of the RAL Front End Test Stand” Letchford et
al, IPAC 2015. - “The Pre-Injector Upgrade for the ISIS H− LINAC”
Lawrie et al, LINAC 2022. - “New PXIe-Based LLRF Architecture and Test Bench for Heavy Ion Linear Acceleration” Badillo et al, IEEE-NPSS Real Time Conference 2014
| Abstract Category | Measurement and Control |
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