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'Journal of Accelerator Conferences Website' (JACoW) is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.

https://doi.org/10.18429/JACoW-ICALEPCS2021-THBR02
Title White Rabbit and MTCA.4 Use in the LLRF Upgrade for CERN’s SPS
Authors
  • T. Włostowski, K. Adrianek, M. Arruat, P. Baudrenghien, A.C. Butterworth, G. Daniluk, J. Egli, J.R. Gill, T. Gingold, J.D. González Cobas, G. Hagmann, P. Kuzmanović, D. Lampridis, M.M. Lipiński, S. Novel González, J.P. Palluel, M. Rizzi, A. Spierer, M. Sumiński, A. Wujek
    CERN, Geneva, Switzerland
Abstract The Super Proton Synchrotron (SPS) Low-level RF (LLRF) system at CERN was completely revamped in 2020. In the old system, the digital signal processing was clocked by a submultiple of the RF. The new system uses a fixed-frequency clock derived from White Rabbit (WR). This triggered the development of an eRTM module for generating very precise clock signals to be fed to the optional RF backplane in MTCA.4 crates. The eRTM14/15 sandwich of modules implements a WR node delivering clock signals with a jitter below 100 fs. WR-clocked RF synthesis inside the FPGA makes it simple to reproduce the RF elsewhere by broadcasting the frequency-tuning words over the WR network itself. These words are received by the WR2RF-VME module and used to produce beam-synchronous signals such as the bunch clock and the revolution tick. This paper explains the general architecture of this new LLRF system, highlighting the role of WR-based synchronization. It then goes on to describe the hardware and gateware designs for both modules, along with their supporting software. A recount of our experience with the deployment of the MTCA.4 platform is also provided.
Paper download THBR02.PDF [0.824 MB / 6 pages]
Slides download THBR02_TALK.PDF [0.981 MB]
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Conference ICALEPCS2021
Series International Conference on Accelerator and Large Experimental Physics Control Systems (18th)
Location Shanghai, China
Date 14-22 October 2021
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Kazuro Furukawa (KEK, Tsukuba, Japan); Yingbing Yan (SARI,Shanghai, China); Yongbin Leng (SARI,Shanghai, China); Zhichu Chen (SARI,Shanghai, China); Volker RW Schaa (GSI, Darmstadt, Germany)
Online ISBN 978-3-95450-221-9
Online ISSN 2226-0358
Received 12 October 2021
Revised 24 October 2021
Accepted 27 December 2021
Issue Date 28 February 2022
DOI doi:10.18429/JACoW-ICALEPCS2021-THBR02
Pages 847-852
Copyright
Creative Commons CC logoPublished by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.