DocumentCode :
2310039
Title :
MicroTCA implementation of synchronous Ethernet-Based DAQ systems for large scale experiments
Author :
Girerd, C. ; Autiero, D. ; Carlus, B. ; Gardien, S. ; Marteau, J. ; Tromeur, W.
Author_Institution :
CNRS, Univ. de Lyon, Villeurbanne, France
fYear :
2009
fDate :
10-15 May 2009
Firstpage :
22
Lastpage :
27
Abstract :
Large LAr TPCs are among the most powerful detectors to address open problems in particle and astro-particle physics, such as CP violation in leptonic sector, neutrino properties and their astrophysical implications, proton decay search etc. The scale of such detector implies severe constraints on their readout and DAQ system. In this article we describe a data acquisition scheme for this new generation of large detectors. The main challenge is to propose a scalable and easy to use solution able to manage a large number of channels at the lowest cost. It is interesting to note that these constraints are very similar to those existing in Network Telecommunication Industry. We propose to study how emerging technologies like ATCA and muTCA could be used in neutrino experiments. We describe the design of an Advanced Mezzanine Board (AMC) including 32 ADC channels. This board receives 32 analogical channels at the front panel and sends the formatted data through the muTCA backplane using a Gigabit Ethernet link. The gigabit switch of the MCH is used to centralize and to send the data to the event building computer. The core of this card is a FPGA (ARIA-GX from ALTERA) including the whole system except the memories. A hardware accelerator has been implemented using a NIOS II muP and a Gigabit MAC IP. Obviously, in order to be able to reconstruct the tracks from the events a time synchronisation system is mandatory. We decided to implement the IEEE1588 standard also called Precision Timing Protocol, another emerging and promising technology in Telecommunication Industry. In this article we describe a Gigabit PTP implementation using the recovered clock of the gigabit link. By doing so the drift is directly cancelled and the PTP will be used only to evaluate and to correct the offset.
Keywords :
data acquisition; field programmable gate arrays; high energy physics instrumentation computing; local area networks; DAQ system; FPGA; IEEE1588 standard; MicroTCA; advanced mezzanine board; astro-particle physics; data acquisition; detectors; field programmable gate arrays; gigabit Ethernet link; gigabit switch; hardware accelerator; leptonic sector; neutrino property; precision timing protocol; proton decay search; synchronous Ethernet; time synchronisation system; Backplanes; Communication industry; Costs; Data acquisition; Detectors; Large-scale systems; Neutrino sources; Physics; Protons; Switches;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Real Time Conference, 2009. RT '09. 16th IEEE-NPSS
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4454-0
Type :
conf
DOI :
10.1109/RTC.2009.5321791
Filename :
5321791
Link To Document :
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