Time error accumulation in a hierarchical time and clock distribution network with deterministic optical links

Abstract Accurate clock and time distribution is a key requirement for self-triggered streaming data acquisition in the CBM experiment. This distribution is handled by the Timing and Fast Control (TFC) system by clock forwarding and broadcasting the common time over latency-deterministic optical lin...

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Bibliographic Details
Published inJournal of instrumentation Vol. 19; no. 3; p. C03014
Main Authors Sidorenko, V., Müller, W.F.J., Emschermann, D., Zabolotny, W., Fröhlich, I., Becker, J.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2024
Subjects
Control and monitor systems online
Data acquisition
Detector control systems (detector and experiment monitoring and slow-control systems, architecture, hardware, algorithms, databases)
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Summary:Abstract Accurate clock and time distribution is a key requirement for self-triggered streaming data acquisition in the CBM experiment. This distribution is handled by the Timing and Fast Control (TFC) system by clock forwarding and broadcasting the common time over latency-deterministic optical links in a hierarchical FPGA network. The point-to-point optical connections are served by the latency-optimized GBT-FPGA core, which has been developed at CERN. In the presented work, the performance of GBT-FPGA links for time and clock distribution in a scaled TFC system with multiple hops and endpoints has been investigated.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/19/03/C03014