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Achieving optimal synchronization accuracy between two White Rabbit devices hinges on the proper selection of transceivers, which act as electro-optical converters connecting WR devices to the optical network infrastructure. The correct…

Systems and Control · Electrical Eng. & Systems 2025-05-06 Michal Špaček , Josef Vojtěch , Jaroslav Roztočil

The water Cherenkov detector array (WCDA) for the large high altitude air shower observatory(LHAASO) will employ more than 3600 hemisphere 8 inch photomultiplier tubes (PMT). The good time performance of PMT, especially the transit time…

Instrumentation and Detectors · Physics 2014-09-05 W. P. Huang , Z. B. Tang , C. Li , K. Jiang , X. K. Zhao

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

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…

In systems with multiple radiation detectors, time synchronization of the data collected from different detectors is essential to reconstruct multi-detector events such as scattering and coincidences. In cases where the number of detectors…

Instrumentation and Detectors · Physics 2019-09-04 Wolfgang Hennig , Vincent Thomas , Shawn Hoover , Olivier Delaune

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…

Distributed antenna arrays have been proposed for many applications ranging from space-based observatories to automated vehicles. Achieving good performance in distributed antenna systems requires stringent synchronization at the wavelength…

Signal Processing · Electrical Eng. & Systems 2022-12-26 Jason M. Merlo , Serge R. Mghabghab , Jeffrey A. Nanzer

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

Water Cherenkov detectors (WCDs) have been widely used in cosmic ray observations. This paper presents, for the first time, a cost-effective WCD design integrating a small photomultiplier tube (PMT) with wavelength-shifting fiber (WLS…

Instrumentation and Detectors · Physics 2025-02-26 H. Sun , Z. Huang , B. Wang , D. Liu , S. Ji , C. Feng

The Water Cherenkov Detector Array (WCDA) is a major component of the Large High Altitude Air Shower Array Observatory (LHAASO), a new generation cosmic-ray experiment with unprecedented sensitivity, currently under construction. The WCDA…

High Energy Astrophysical Phenomena · Physics 2021-02-24 Yingying Guo , Xiaochuan Chang , Hongbo Hu , Zhiguo Yao

The Large Area Water Cherenkov Array (LAWCA) experiment focuses on high energy gamma astronomy between 100 GeV and 30 TeV. Invoked by the idea of hardware triggerless structure, a prototype of LAWCA trigger electronics is implemented in one…

Instrumentation and Detectors · Physics 2013-05-22 Yao Lin , Zhao Lei , Shang Lin-Feng , Liu Shu-Bin , An Qi

We demonstrate a wireless, decentralized time-alignment method for distributed antenna arrays and distributed wireless networks that achieves picosecond-level synchronization. Distributed antenna arrays consist of spatially separated…

Signal Processing · Electrical Eng. & Systems 2024-10-29 Naim Shandi , Jason M. Merlo , Jeffrey A. Nanzer

The Large High-Altitude Air Shower Observatory (LHAASO) is being built at Haizi Mountain, Sichuan province of China at an altitude of 4410 meters. One of its main goals is to survey the northern sky for very-high-energy gamma ray sources…

Instrumentation and Detectors · Physics 2021-03-29 Kun Jiang , Zebo Tang , Xin Li , Zehua Cao , Cheng Li , Yang Li , Ziwei Li , Ziyang Li , Zheng Liang , Pengzhong Lu , Kaifeng Shen , Kaiyang Wang , Yan Wang , Xin Wu

The High-Altitude Water Cherenkov (HAWC) Experiment is a second-generation highsensitivity gamma-ray and cosmic-ray detector that builds on the experience and technology of the Milagro observatory. Like Milagro, HAWC utilizes the water…

Instrumentation and Methods for Astrophysics · Physics 2009-09-16 Petra Huentemeyer , John A. J. Matthews , Brenda Dingus

The DUNE neutrino experiment far detector has a fiducial mass of 40 kt. The O(1M) readout channels are distributed over the four 10 kt modules and need to be synchronized with respect to each other to a precision of O(10 ns). The entire…

High Energy Physics - Experiment · Physics 2023-02-15 A. Barcock , D. Cussans , D. Lindebaum , D. Newbold , S. Paramesvaran , S. Trilov

Phase, time, and frequency coordination are crucial for the coherent operation of distributed antenna arrays. This paper demonstrates a high accuracy decentralized time synchronization method for arrays with dynamic connectivity. To…

Signal Processing · Electrical Eng. & Systems 2024-10-24 Naim Shandi , Jason M. Merlo , Jeffrey A. Nanzer

In the global network of institutions engaged with the realization of International Atomic Time (TAI), atomic clocks and time scales are compared by means of the Global Positioning System (GPS) and by employing telecommunication satellites…

Instrumentation and Detectors · Physics 2019-10-24 D. Piester , M. Rost , M. Fujieda , T. Feldmann , A. Bauch

Accurate time synchronization is essential for Internet of Things (IoT) systems, where multiple distributed nodes must share a common time base for coordinated sensing and data fusion. However, conventional synchronization approaches suffer…

Networking and Internet Architecture · Computer Science 2026-04-09 Ziyao Zhou , Tiancheng Cao , Chen Shen , Jiaqi Zhang , Yuting Liu , Hen-Wei Huang