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|**Time**|**Title**|**Speaker(s)**|
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|14:00 - 14:30|WR status at KM3NeT: current and future developments|Tommaso Chiarusi, Diego Real|
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|14:30 - 15:00|White Rabbit Network at GSI - stretching WR switches|Enkhbold Ochirsuren|
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|15:00 - 15:30|WR deployment at LHAASO and other works|Guanghua Gong|
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|15:30 - 15:45|Coffee break||
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|15:45 - 16:15|Next generation White Rabbit Switch version 4|Maciej Lipiński|
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|16:15 - 17:00|The future of White Rabbit|Javier Serrano|
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#### Friday 8 October 2021
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## Short abstracts
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### Wednesday
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- **Introduction to White Rabbit and to the workshop**: A quick introduction for newcomers and setting the scene for the workshop.
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- **Status of the core WR components: WR Switch & WR PTP Core**: The presentation highlights current development status and plans for the near future of the two core components of every White Rabbit network. It will cover the main features of the latest stable release v6.0 of the WR switch firmware, ongoing developments, and plans for the WR PTP Core release v5.0
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- **SPEC7 and HPSEC: when Low Phase Noise matters**: SPEC7 is a successor of the well-known SPEC. It is based on a ZYNQ-7000 FPGA that contains Programmable Logic (PL) and a Processing System (PS) . Like the SPEC, the SPEC7 can be operate stand alone or in a PCIe slot and can carry an FMC module. The Processing System of SPEC7 interfaces to Ethernet, USB and SD-card. Special attention was given to the SPEC7 design with respect to Low Phase Noise. The 10MHz output reaches -106 dBc/Hz at 10Hz offset out of the box. For extreme Low Phase Noise requirements SPEC7 can be operated with a high precision, ultra stable 10 MHz Oven Controlled Crystal Oscillator (OCXO). The High Precision Secondary External Clock (HPSEC) uses a Morion MV336 . The combination of a WR low-jitter switch and a SPEC7 + HPSEC reaches -135 dBc/Hz at 10Hz offset.
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- **Status and update on absolute calibration of WR-devices and SFP-transceivers**: We will summarize the efforts and status on absolute calibration of White Rabbit devices and SFP transceivers. SPEC and SPEC7 devices have been abs-calibrated at NIKEF, VTT, and NPL – results will be compared. Absolute-calibrated optical reference-receivers are a prerequisite for SFP-calibration. Two reference-receivers have been calibrated at NIKHEF and at VTT – results will be compared. Plans for future work, e.g. transfer of absolute calibration to WR-switch and from optical reference-receiver to SFP-transceiver will be discussed.
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- **IEEE 1588-2019 High Accuracy Profile and more**: The presentation will summarize the WR standardisation process that concluded with the publication of the IEEE1588-2019 edition of the PTP standard. It will detail how the WR specification was translated into the Default High Accuracy Profile and provide the status of its implementation for WR devices. It will also provide an update on other ongoing WR-related standardisation efforts.
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- **A quick tour through the available diagnostic and monitoring tools for White Rabbit Networks**: The White Rabbit project started more than 10 years ago. Since the beginning many standard and WR-specific tools were developed. This presentation gives a quick tour on available tools that can be useful for different types of WR users, from developers of WR based devices, through its users as a white box, to WR network administrators. This includes tools for debugging and monitoring of WR nodes and switches.
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### Thursday
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- **WR deployment at LHAASO and other works**: The LHAASO experiment has been fully operational since last June and discovered PeVatrons from our Galaxy. The more than six thousand detector units are synchronized to sub-ns level with the help of WR technology. The deployment of the WR network and some running status will be given in this report.
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- **Next generation White Rabbit Switch version 4**: The presentation will provide an overview of the ongoing development of the hardware for the next generation White Switch v4. It will describe its design specification, architecture and features as well as provide the development status and plans.
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- **The future of White Rabbit**: An open discussion session with the aim of identifying past and current successes and issues and finding the best path forward for the WR community. In particular, we will discuss the latest draft of the [WR Collaboration proposal](https://cernbox.cern.ch/index.php/s/PPUdASzjKyDBVXU) and try to decide if there is enough support to launch the effort in 2022. |
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