NDLI: The T2K near detector data acquisition systems

Content Provider	IEEE Xplore Digital Library
Author	Thorpe, M. Angelsen, C. Barr, G. Metelko, C. Nicholls, T. Pearce, G. West, N.
Copyright Year	2010
Description	Author affiliation: Department of Physics, University of Oxford, Denis Wilkinson Bldg, Keble Road, OX1 3RH, U.K. (Barr, G.; West, N.) \|\| STFC Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Didcot, Oxon, OX11 0QX, U.K. (Thorpe, M.; Angelsen, C.; Metelko, C.; Nicholls, T.; Pearce, G.)
Abstract	T2K is a second generation long-baseline experiment in Japan, designed to perform precision studies of neutrino oscillations. A neutrino beam originating at the J-PARC facility is sampled by two near detectors, approximately 280m distant from the source and directed towards the Kamioka underground facility, 295km distant, where the Super-Kamiokande water Cerenkov detector is situated. Both the on-axis (INGRID) and off-axis (ND280) near detectors employ the MIDAS framework for their data acquisition systems. Events are selected via a flexible hardware trigger, which allows mixed operating modes incorporating beam spill, cosmic and calibration triggers. Data are acquired from the front-end electronics over optical gigabit Ethernet links by custom MIDAS front-end applications distributed over a cluster of Linux computers. Event fragments from all sub-detectors are merged and logged on a central backend processor and then copied to remote storage for longterm archival. The system is also designed to allow flexible partitioning of sub-detectors for standalone diagnostics and calibration. We present the design of the DAQ system and report on experience gathered during early operation of the near detectors.
Starting Page	1
Ending Page	8
File Size	1351530
Page Count	8
File Format	PDF
ISBN	9781424471089
e-ISBN	9781424471102
DOI	10.1109/RTC.2010.5750358
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-24
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Data acquisition Neutrino sources Clocks Oscillators Monitoring Optical fiber communication
Content Type	Text
Resource Type	Article

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