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Sub-ns timing for the Pacific Ocean Neutrino Experiment by optical fiber using Gigabit Ethernet

Böhmer M, Gernhäuser R, Ginzkey L, Halliday R, Spannfellner C, Whitehorn N, Agostini M, Bailly N, Baron AJ, Bedard J, Bellenghi C, Bosma C, Brussow D, Clark K, Crudele B, Danninger M, De Leo F, Deis N, DeYoung T, Dinkel M, Garriz J, Gärtner A, Ghuman D, Gousy-Leblanc V, Grant D, Haack C, Hatch P, Henningsen F, Holzapfel K, Jenkyns R, Kerscher T, Kerschtien S, Kopański K, Kopper C, Krauss CB, Kulin I, Kurahashi N, Lai PC, Lavallee T, Leismüller K, Leys S, Li R, Malecki P, McElroy T, Maunder A, Michel J, Trejo SM, Miller C, Molberg N, Moore R, Niederhausen H, Noga W, Papp L, Park N, Paulson M, Pirenne B, Qiu T, Resconi E, Retza N, Agreda SR, Robertson S, Ruskey A, Schumacher L, Sclafani S, Stacho J, Taboada I, Terliuk A, Tradewell M, Traxler M, Tung CF, Twagirayezu JP, Veenstra B, Wagner S, Weaver C, Wu K, Yañez JP, Yu S, Zheng Y (2024)

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Publication Language: English

Publication Type: Conference contribution

Publication year: 2024

Journal

Publisher: Sissa Medialab Srl

Series: Proceedings of Science

Book Volume: 444

Pages Range: 1216

Conference Proceedings Title: Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

Event location: Nagoya

DOI: 10.22323/1.444.1216

Abstract

Precise timing inside the Pacific Ocean Neutrino Experiment (P-ONE) will be mandatory to allow synchronization of the DAQ systems inside the P-ONE Optical Modules (P-OMs). The DAQ system is designed to digitize 16 channels of photomultiplier tube (PMT) waveforms at high speed, with a large buffer and waveform pre-processing capabilities. This requires a fast and reliable data path between P-OMs and shore, as well as sub-nanosecond synchronization amongst P-OMs, while keeping the cable design as light-weight as possible to reduce mechanical stress. To meet these requirements, an optical network based on standard Gigabit Ethernet (GbE) on Lattice ECP3/ECP5 FPGAs is presented. It allows syntonous operation of the P-OMs by propagation of a central 125 MHz clock in addition to coarse and fine delay measurements on the point-to-point fiber links, and provides Gigabit Ethernet to all endpoints in the network. This allows precise timing and use of commercial off-the-shelf network components inside the P-OMs and the connected mooring junction box (mJB), serving as a network hub. This greatly simplifies the design process and makes well-tested, easily integrated network standards available for data transport.

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How to cite

APA:

Böhmer, M., Gernhäuser, R., Ginzkey, L., Halliday, R., Spannfellner, C., Whitehorn, N.,... Zheng, Y. (2024). Sub-ns timing for the Pacific Ocean Neutrino Experiment by optical fiber using Gigabit Ethernet. In Takayuki Saito, Kimihiro Okumura (Eds.), Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) (pp. 1216). Nagoya, JP: Sissa Medialab Srl.

MLA:

Böhmer, Michael, et al. "Sub-ns timing for the Pacific Ocean Neutrino Experiment by optical fiber using Gigabit Ethernet." Proceedings of the 38th International Cosmic Ray Conference, ICRC 2023, Nagoya Ed. Takayuki Saito, Kimihiro Okumura, Sissa Medialab Srl, 2024. 1216.

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