Performance results of the first White Rabbit installation for CNGS time transfer

Author

Lipinski, Maciej ; Wlostowski, Tomasz ; Serrano, Javier ; Alvarez, Pablo ; Cobas, Juan David Gonzalez ; Rubini, Alessandro ; Moreira, Pedro

fYear

2012

fDate

24-28 Sept. 2012

Firstpage

1

Lastpage

6

Abstract

This paper describes the long-term performance of White Rabbit (WR) based time and frequency transfer in the systems deployed at CERN and Gran Sasso National Laboratory. WR is a new technology based on IEEE 1588-2008 and Synchronous Ethernet which allows for sub-nanosecond accuracy and picosecond precision of synchronization in an Ethernet-based network. The first installation of WR is used in the CERN Neutrino to Gran Sasso (CNGS) project to transfer the Coordinated Universal Time (UTC) from a Global Positioning System (GPS) receiver to the underground extraction/detection points. The data collected during the system operation is used to evaluate its performance. Additionally, the performance in varying temperature conditions is verified with tests in a climatic chamber. We evaluate time transfer by measuring the offset between the time reference and the time receiver (WR Node). The stability of the transfered frequency is evaluated by analyzing the Allan Deviation (ADEV) and the Maximum Time Interval Error (MTIE).

Keywords

Global Positioning System; computerised instrumentation; local area networks; sensors; time measurement; ADEV; Allan deviation; CERN Neutrino to Gran Sasso project; CNGS time transfer; GPS receiver; Global Positioning System receiver; Gran Sasso National Laboratory; IEEE 1588-2008 standard; MTIE; UTC; WR installation; climatic chamber testing; coordinated universal time; data collection; frequency transfer system; maximum time interval error; synchronous Ethernet-based network; time receiver; time reference; time transfer evaluate; time transfer system; underground extraction-detection point; white rabbit installation; Accuracy; Delay; Global Positioning System; Liquefied natural gas; Monitoring; Synchronization; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Clock Synchronization for Measurement Control and Communication (ISPCS), 2012 International IEEE Symposium on

Conference_Location

San Francisco, CA

ISSN

1949-0305

Print_ISBN

978-1-4577-1714-7

Type

conf

DOI

10.1109/ISPCS.2012.6336610

Filename

6336610