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TY - CONF AU - Li, H. AU - Du, Q. AU - Gong, G.H. ED - Corvetti, Lou ED - Riches, Kathleen ED - Schaa, Volker RW TI - Prototype of White Rabbit Network in LHAASO J2 - Proc. of ICALEPCS2015, Melbourne, Australia, 17-23 October 2015 C1 - Melbourne, Australia T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 15 LA - english AB - Synchronization is a crucial concern in distributed measurement and control systems. White Rabbit provides sub-nanosecond accuracy and picoseconds precision for large distributed systems. In the Large High Altitude Air Shower Observatory project, to guarantee the angular resolution of reconstructed air shower event, a 500 ps overall synchronization precision must be achieved among thousands of detectors. A small prototype built at Yangbajin, Tibet, China has been working well for a whole year. A portable calibration node directly synced with the grandmaster switch and a simple detectors stack named Telescope are used to verify the overall synchronization precision of the whole prototype. The preliminary experiment results show that the long term synchronization of the White-Rabbit network is promising and 500 ps overall synchronization precision is achievable with node by node calibration and temperature correction. PB - JACoW CP - Geneva, Switzerland SP - 999 EP - 1002 KW - network KW - detector KW - timing KW - controls KW - experiment DA - 2015/12 PY - 2015 SN - 978-3-95450-148-9 DO - 10.18429/JACoW-ICALEPCS2015-WEPGF126 UR - http://jacow.org/icalepcs2015/papers/wepgf126.pdf ER -