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White Rabbit (WR) technology provides a commercially-available off-the-shelf solution for time synchronisation with sub-nanosecond accuracy and picosecond-level precision over optical fibre links typically spanning tens of kilometres. Such…

Quantum Physics · Physics 2025-12-01 Ben Amies-King , Marco Lucamarini

As radiation detector arrays in nuclear physics applications become larger and physically more separated, the time synchronization and trigger distribution between many channels of detector readout electronics become more challenging.…

Instrumentation and Detectors · Physics 2021-09-01 Wolfgang Hennig , Shawn Hoover

Radio channels at mmWave and sub-THz frequencies for 5G and 6G communications offer large channel bandwidths (hundreds of MHz to several GHz) to achieve multi-Gbps data rates. Accurate modeling of the radio channel for these wide bandwidths…

Signal Processing · Electrical Eng. & Systems 2023-09-06 Dipankar Shakya , Hitesh Poddar , Theodore S. Rappaport

The AstroSat mission carries several high-energy detectors meant for fast timing studies of cosmic sources. In order to carry out high precision multi-wavelength timing studies, it is essential to calibrate the absolute time stamps of these…

Instrumentation and Methods for Astrophysics · Physics 2021-07-07 Avishek Basu , Dipankar Bhattacharya , Bhal Chandra Joshi

We demonstrate picosecond-level synchronization of two actively mode-locked Ti:Sapphire lasers via the White Rabbit Precision Time Protocol (WR-PTP), tested over 120 km of deployed optical fiber. This synchronization capability, in…

To guarantee the angular resolution, the Large High Altitude Air Shower Observatory (LHAASO) requires a 500ps (rms) timing synchronization among the 6866 detect units for its KM2A sub-detector array. The White Rabbit technology is applied…

Instrumentation and Detectors · Physics 2014-06-18 Hongming Li , Guanghua Gong , Weibin Pan , Qiang Du , Jianmin Li

A precise synchronization between laser pulse and electron beam arrival time is essential for achieving sub-picosecond stability in modern accelerator facilities. In this work, a Low-Level RF system architecture combined with White Rabbit…

We have developed a means for accurate time transfer using optical fibers and aim at the synchronization of clocks located at different places on an institute campus with an overall uncertainty of 100 ps or better. Such an installation…

Instrumentation and Detectors · Physics 2019-10-25 D. Piester , M. Fujieda , M. Rost , A. Bauch

While wired-power-transfer devices ensure robust power delivery even if the receiver position or load impedance changes, achieving the robustness of wireless power transfer (WPT) is challenging. Conventional solutions are based on…

Applied Physics · Physics 2020-01-09 Fu Liu , Bhakti Chowkwale , Prasad Jayathurathnage , Sergei Tretyakov

In ground-based extensive air shower experiments, the direction and energy are reconstructed by measuring the relative arrival time of secondary particles, and the energy they deposit. The measurement precision of the arrival time is…

Instrumentation and Methods for Astrophysics · Physics 2013-12-18 Qian Xiang-Li , Chang Jin-Fan , Feng Cun-Feng , Feng Zhao-Yang , Gou Quan-Bu , Guo Yi-Qing , Hu Hong-Bo , Liu Cheng , Wang Zheng , Xue Liang , Zhang Xue-Yao , Zhang Yi

Sub-nanosecond precision clock synchronization over the packet network has been achieved by the White Rabbit protocol for a decade. However, few computer systems utilize such a technique. We try to attract more interest in the clock…

Networking and Internet Architecture · Computer Science 2021-07-01 Ying Zhang

Nonlinear parity-time (PT) symmetry in non-Hermitian wireless power transfer (WPT) systems, while attracting significant attention from both physics and engineering communities, have posed formidable theoretical and practical challenges due…

Applied Physics · Physics 2025-08-01 Xianglin Hao , Xiaosheng Wang , ke Yin , Sheng Ren , Chaoqiang Jiang , Jianlong Zou , Tianyu Dong , Chi Kong Tse

In distributed quantum applications such as entanglement distribution, precise time synchronization and efficient time-tagged data handling are essential. Traditional systems often suffer from overflow, synchronization drift, and storage…

Large-scale systems, such as very large accelerators used for fundamental research, require the implementation of precise timing and synchronization systems over distances of several tens of kilometers. A very high precision has been…

Accelerator Physics · Physics 2026-02-25 Alice Renaux , Ronic Chiche , A. Martens , Antoine Back , Paul-Éric Pottie , Daniel Charlet

Wireless power transfer (WPT) has garnered increasing attention due to its potential to eliminate device-side batteries. With the advent of (distributed) multiple-input multiple-output (MIMO), radio frequency (RF) WPT has become feasible…

Signal Processing · Electrical Eng. & Systems 2024-08-21 Gilles Callebaut , Jarne Van Mulders , Bert Cox , Liesbet Van der Perre , Lieven De Strycker , François Rottenberg

This work presents a fully-digital high-accuracy real-time calibration procedure for frequency and time alignment of open-loop wirelessly coordinated coherent distributed antenna array (CDA) modems, enabling radio frequency (RF) phase…

Signal Processing · Electrical Eng. & Systems 2025-12-02 Jason M. Merlo , Samuel Wagner , John Lancaster , Jeffrey A. Nanzer

The Water Cherenkov Detector Array (WCDA) is one of the key parts in the Large High Altitude Air Shower Observatory (LHAASO). In the WCDA, 3600 Photomultiplier Tubes (PMTs) and the Front End Electronics (FEEs) are scattered within a 90000…

Instrumentation and Detectors · Physics 2019-07-25 Lei Zhao , Shaoping Chu , Cong Ma , Xingshun Gao , Yunfan Yang , Shubin Liu , Qi An

We report on the construction and testing of a vacuum-gap Fabry-P\'erot etalon calibrator for high precision radial velocity spectrographs. Our etalon is traced against a rubidium frequency standard to provide a cost effective, yet…

Instrumentation and Methods for Astrophysics · Physics 2017-06-20 Julian Stürmer , Andreas Seifahrt , Christian Schwab , Jacob L. Bean

It is widely recognised that over-reliance on GNSS (e.g GPS) for time synchronisation represents an acute threat to modern society, and a diversity of alternatives are required to mitigate the threat of an outage. This paper proposes a GNSS…

Signal Processing · Electrical Eng. & Systems 2023-07-28 Stephen Robson

JWST, despite not being designed to observe astrophysical phenomena that vary on rapid time scales, can be an unparalleled tool for such studies. If timing systematics can be controlled, JWST will be able to open up the sub-second infrared…

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