White Rabbit

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What is it?

White Rabbit provides sub-nanosecond accuracy and a precision of a few picoseconds in the synchronisation of large distributed systems. It also allows for deterministic and reliable data delivery. White Rabbit  enables you to precision time-tag measured data and lets you trigger data taking in large installations while using the same network to transmit data.

Use case

At CERN, particles circle the LHC over 11000 times per second. This means components in the accelerator complex require extreme timing accuracy and synchronisation down to 10 picoseconds. White Rabbit (WR) is a protocol for monitoring and controlling devices based on industrial networking technology, made available as open-source hardware and software. Yet this technology is now also used in many cases outside CERN, for example in state-of-the-art network time synchronisation by the Deutsche Börse Group.