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Javier Serrano (CERN)25/06/2025, 10:30
Welcome to the event and a few words on logistics
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Javier Serrano (CERN)25/06/2025, 10:35
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Maciej Marek Lipinski (CERN), Quentin Genoud (CERN)25/06/2025, 11:00
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Maciej Marek Lipinski (CERN)25/06/2025, 11:30
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Gijs Schoonderbeek (ASTRON)25/06/2025, 14:00
At ASTRON, the Netherlands Institute for Radio Astronomy, we are designing a new generation of radio telescopes. Traditionally, coaxial cables have been used to transport signals from the antenna to the processing facility. For our future telescopes, we aim to replace coaxial cables with optical fibre interconnects. This change requires a synchronised ADC to be implemented close to the...
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Vitalii Sliusar (University of Geneva)25/06/2025, 14:20
In the recent years, Cherenkov telescopes have begun to be used for observations in the optical band using the technique of intensity interferometry. Intensity interferometry requires fast detectors—which Cherenkov telescopes already possess, as their cameras are comprised of photomultiplier tubes (PMTs)—as well as time synchronization between two telescopes to record data simultaneously and...
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Paul Boven (JIVE)25/06/2025, 14:40
We examine the suitability of White Rabbit for the distribution of a reference phase signal in radio interferometers. Receptors in an interferometric array require a stable reference phase, and the phase noise due to the clock distribution could possibly lead to a reduction in the amplitude of the cross product of the signals, an effect known as 'coherence loss', which reduces the sensitivity...
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Simon Brown (EISCAT)25/06/2025, 15:10
The talk will briefly cover the progress in the EISCAT 3D radar project during the last year and give details of the new possibility of time transfer between the radar sites.
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Evangelia Gousiou (CERN), Tristan Gingold (CERN)25/06/2025, 15:25
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Lilith Kaffka (University of Dundee (GB))25/06/2025, 15:50
To meet the High-Luminosity LHC demand for enhanced phase stability and replace the outdated RF and timing distribution system (called TTC backbone), an upgrade to a White Rabbit-based system is planned. A compliance test showed a phase variation of less than 30 ps in a proof-of-concept system. In order to assess the quality of the new system in real conditions a test campaign was started in...
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Jaffar Kadum (PTB)25/06/2025, 16:40
In this abstract we report a multi-user time and frequency distribution architecture based on White Rabbit (WR) technology and dense wavelength-division multiplexing. A novel in-situ calibration method of the chromatic dispersion-induced delay asymmetry in a deployed link has been implemented. The calibration procedure provides effective and accurate calibration for the White rabbit time...
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Annick Teepe25/06/2025, 16:55
Video: https://videos.cern.ch/record/2301746
Challenges in building large scale quantum networks are high precision time synchronization, and fluctuating conditions of the fiber links, which impact the quality of entanglement between transmitted photon pairs. White Rabbit (WR) can be used to synchronize two distant quantum network nodes with high precision. Multiplexing the optical WR...
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Ulrich Langenbach (Missing Link Electronics GmbH)25/06/2025, 17:15
This talk provides an overview about the most major steps on White Rabbit within MLE. We present our journey with the Dormouse Card and the enablement of it for ZCU102, ZCU106, ZCU111 platforms. Based on this development a bistatic RADAR setup has been built together with and at KIT. The respective setup is also used in 6G massive MIMO experiments.
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As a side effect of the Dormouse related... -
25/06/2025, 17:35
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Yadav Neelam (OBSPM)26/06/2025, 09:30
REFIMEVE is a French national research infrastructure, officially recognized in 2021, based
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on a fiber-optic network that disseminates ultra-stable time and frequency signals over long
distances. Reference signals originate at LTE (former SYRTE) at Paris Observatory and are
primarily transported over the optical fibre network backbone of RENATER [1]. It currently
connects more than 20... -
Josef Vojtěch (CESNET)26/06/2025, 09:50
The long-haul reach capability of White Rabbit technology is remarkable and plays a vital role far beyond National Research and Education Networks (NRENs). It enables ultra-precise time and frequency synchronization over vast distances, benefiting a wide range of industries including telecommunications, finance, and power grid management. This presentation will explore current methods to...
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Divya Singh Yadav (CSIR National Physical Laboratory)26/06/2025, 10:10
This paper presents the establishment and performance evaluation of White Rabbit (WR-PTP) and Precision Time Protocol (PTP) over a 12 km round-trip optical fiber link based on a telecom network, implemented at the Council of Scientific and Industrial Research – National Physical Laboratory (CSIR–NPL), New Delhi, India. Precise time and frequency synchronization is essential for a wide range of...
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Marek Brawański (Orange Polska)26/06/2025, 11:00
This short talk will cover WR features needed for guaranteeing a high standard of reliability and availability in telecom applications, such as an enterprise approach to network calibration during the network lifecycle.
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The presentation will also introduce the concept of VTTNs (Virtual Time Transfer Networks) and their pivotal role in resilient distributed timescales using WR. -
Daniel Chung, Nick Amey (IQD Frequency Products)26/06/2025, 11:10
In March 2024 IQD presented at the White Rabbit Collaboration workshop. We gave the first details of a project in which we build an expansion board to be used in the new WRv4 switch. We had some great feedback last year regarding specific use cases for holdover in a White Rabbit environment.
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This year we are happy to be back again and to be giving an update on the progress of this project. We... -
Phil Adlam (XPLOR)26/06/2025, 11:40
An overview of the current real world problems on the Stage and Screen, alongside a brief overview of the current work we are carrying out at XPLOR & Production Park.
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Konstantinos Asteriou (Nikhef), Peter Jansweijer (Nikhef)26/06/2025, 13:30
Usually the WR reference clock is the source of the WR timing signals (10MHz and PPS), however, for low phase noise it is profitable to use the output of the local oscillator.
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In many White Rabbit systems the local oscillator has a different frequency than the White Rabbit reference clock which leads to a fixed number of possible phase lock positions.
Using the local oscillator directly... -
Konstantinos Asteriou, Peter Jansweijer (Nikhef)26/06/2025, 13:30
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Emilien Decoux (Femto ST), Jean Michel Friedt (Femto ST)26/06/2025, 14:00
In 2022, PTP became available to the masses thanks to the availability of the Raspberry Pi Compute Module 4 and its PTP compatible network interface [1], and now the Compute Module 5.
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In the meantime, PTP High Accuracy's White Rabbit has remained confined to dedicated boards providing the external oscillators needed to generate the beatnote for fine phase measurement, until 2024's Missing... -
Mr Antoine Back (IJCLAB)26/06/2025, 14:30
In this presentation, we will showcase the metrological evaluation of a newly developed electronic architecture—a custom carrier board built around the Altera Arria10 FPGA—which integrates White Rabbit technology. This system is an original platform tailored for high-performance frequency and time distribution, as well as precise timing capture for phased-array detectors. We will present...
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Seth Friedman (LMS)26/06/2025, 14:50
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Bob Noseworthy (University of New Hampshire)26/06/2025, 15:45
The NSF POSE funded Open PHASE effort hosted by UNH-IOL is entering its second year and nearing readiness to support the needs of the White Rabbit Collaboration's certification process. This talk will update the WR Workshop attendees on the goals and mission of the Open PHASE effort, how to participate, steer and benefit from the effort.
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Javier Serrano (CERN)26/06/2025, 16:10
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Guanghua Gong (SyncTechnology)
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Nick Amey (IQD Frequency Products)
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Alex Forencich (UC San Diego)
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Roel de Vries (Fugro)
Combining WhiteRabbit with AtomiChron HA (High Accuracy) real-time PPP GNSS service, allows for WhiteRabbit links to extend beyond the need for Fiber Optic availability and connect WR networks anywhere in the world. Real-time PPP enables WR links by jumping any distance at similar performance levels to WR. Besides this possible hybrid approach combining the 2 technologies, the UTC(k) reference...
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Harald Hauglin (Statnett), Kjell Petter Myhren (Statnett), Oddleiv Tungland (Statnett)
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Simon Brown
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Łukasz K Bonenberg (European Commission)
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Roel Witvers (Astron)
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CARLOS MEGIAS NUNEZ (University of Granada)
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Daniel CHARLET (CNRS)
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Maciej Marek Lipinski (CERN)
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Karolina Schatz (University of York)
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Seth Friedman (Liquid Markets Solutions)
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Paul-Éric Pottie (Observatoire de Paris-PSL, CNRS, SU, LNE)
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Ricardo Píriz (GMV)
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Adam Artur Wujek
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Tomasz Wlostowski (CERN)
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Tristan Gingold (CERN)
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Peter Jansweijer (Nikhef National institute for subatomic physics (NL))
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Antoine Jallageas (METAS)
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Dr Sofia Vallecorsa (CERN)
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Bob Noseworthy (University of New Hampshire)
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Javier Serrano (CERN)
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Amanda Diez Fernandez (CERN)
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Georg Sauthoff (Deutsche Börse)
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Marek Brawański (Orange Polska)
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Ya-Shian Li-Baboud (NIST)
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Javier Serrano (CERN)
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Jeroen Koelemeij (VU University)
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Rhodri Jones (CERN)
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Giovanni Anelli (CERN)
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Bence Szikora (Jump Trading)
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Evangelia Gousiou (CERN)
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Dietrich Beck (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
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Benoit RAT
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Maciej Marek Lipinski (CERN)
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