Difference between revisions of "Data Rates"

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= Disclaimer =
= Disclaimer =
'''This page is under construction.'''
'''This page is under construction.'''
It was originally developed for LBNE and is yet to be updated with more recent information
contained in the CDR revisions and other documents.
= Overview =
= Overview =

Revision as of 17:20, 30 November 2017


This page is under construction.


According to the physics goals of the experiment, we need to consider the following main sources of signal:

  • The "beam neutrino" signal
  • The Supernova Burst (SNB) signal
  • Proton Decay
  • Solar neutrinos

All these signals have distinct energy scales, topologies and other characteristics. In terms of buffering and processing data in real or near time, they pose different requirements.

Beam Neutrinos

Because of the energy scale (~GeV range) neutrino interactions will be characterized by TPC signals well above radiological background. Zero-suppression will lead to significant reduction of data volume and rates (the detector will appear "empty" for the most part).



νe+40Ar ⇒ e-+40K*

ν e+40Ar ⇒ e++40Cl*

νx+40Ar ⇒ νx+40Ar*

νe,x+e- ⇒ νe,x+e-



  • DocDB 6977 - Software for low-energy signals
  • DocDB 8481 - Summary of SNB Working Group Progress (February 2014)

Some reference curves from DocDB 6977:

SNB spectrum 1.png

In a nutshell:

  • approximately 100 events per kiloton, spread over ~30 seconds, ~½ in first second
  • all flavors, few tens of MeV

Other material

Proton Decay




  • DocDB 6212 - M.Smy's slides from 2012 (LBNE solar studies potential)


Background Sources


Important radiologicals

  • 39Ar 1.01 Bq/kg β- End-point: 0.565MeV
  • 85Kr 0.1-0.3 Bq/kg β- End-point: 0.687MeV


Muon and Neutron Backgrounds (40Cl)

Solar bkg 1.png

Summary Plots

Caveat - in the plots below the neutron data reflect the number of neutrons, not tracks, hits or counts created by neutrons. TBD! BGRates.png

Same plot, but in large (5MeV) bins:
BGRates 5MeVBins.png