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Title: NOvA Event Building, Buffering and Data-Driven Triggering From Within the DAQ System

Abstract

To make its core measurements, the NOvA experiment needs to make real-time data-driven decisions involving beam-spill time correlation and other triggering issues. NOvA-DDT is a prototype Data-Driven Triggering system, built using the Fermilab artdaq generic DAQ/Event-building tools set. This provides the advantages of sharing online software infrastructure with other Intensity Frontier experiments, and of being able to use any offline analysis module--unchanged--as a component of the online triggering decisions. The NOvA-artdaq architecture chosen has significant advantages, including graceful degradation if the triggering decision software fails or cannot be done quickly enough for some fraction of the time-slice ``events.'' We have tested and measured the performance and overhead of NOvA-DDT using an actual Hough transform based trigger decision module taken from the NOvA offline software. The results of these tests--98 ms mean time per event on only 1/16 of th e available processing power of a node, and overheads of about 2 ms per event--provide a proof of concept: NOvA-DDT is a viable strategy for data acquisition, event building, and trigger processing at the NOvA far detector.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1423267
Report Number(s):
FERMILAB-CONF-12-302-CD
1119636
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Journal Name:
J.Phys.Conf.Ser.
Additional Journal Information:
Journal Volume: 396; Conference: 19th International Conference on Computing in High Energy and Nuclear Physics, New York, USA, 05/21-05/25/2012
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Fischler, M., Green, C., Kowalkowski, J., Norman, A., Paterno, M., and Rechenmacher, R. NOvA Event Building, Buffering and Data-Driven Triggering From Within the DAQ System. United States: N. p., 2012. Web. doi:10.1088/1742-6596/396/1/012020.
Fischler, M., Green, C., Kowalkowski, J., Norman, A., Paterno, M., & Rechenmacher, R. NOvA Event Building, Buffering and Data-Driven Triggering From Within the DAQ System. United States. doi:10.1088/1742-6596/396/1/012020.
Fischler, M., Green, C., Kowalkowski, J., Norman, A., Paterno, M., and Rechenmacher, R. Fri . "NOvA Event Building, Buffering and Data-Driven Triggering From Within the DAQ System". United States. doi:10.1088/1742-6596/396/1/012020. https://www.osti.gov/servlets/purl/1423267.
@article{osti_1423267,
title = {NOvA Event Building, Buffering and Data-Driven Triggering From Within the DAQ System},
author = {Fischler, M. and Green, C. and Kowalkowski, J. and Norman, A. and Paterno, M. and Rechenmacher, R.},
abstractNote = {To make its core measurements, the NOvA experiment needs to make real-time data-driven decisions involving beam-spill time correlation and other triggering issues. NOvA-DDT is a prototype Data-Driven Triggering system, built using the Fermilab artdaq generic DAQ/Event-building tools set. This provides the advantages of sharing online software infrastructure with other Intensity Frontier experiments, and of being able to use any offline analysis module--unchanged--as a component of the online triggering decisions. The NOvA-artdaq architecture chosen has significant advantages, including graceful degradation if the triggering decision software fails or cannot be done quickly enough for some fraction of the time-slice ``events.'' We have tested and measured the performance and overhead of NOvA-DDT using an actual Hough transform based trigger decision module taken from the NOvA offline software. The results of these tests--98 ms mean time per event on only 1/16 of th e available processing power of a node, and overheads of about 2 ms per event--provide a proof of concept: NOvA-DDT is a viable strategy for data acquisition, event building, and trigger processing at the NOvA far detector.},
doi = {10.1088/1742-6596/396/1/012020},
journal = {J.Phys.Conf.Ser.},
number = ,
volume = 396,
place = {United States},
year = {2012},
month = {6}
}

Conference:
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