Baby-MIND consists of magnetized steel plates which bend a muon by a small angle as it passes through them. Muons can either be positively or negatively charged, they are bent either upwards or downwards depending on their charge and vertical position in the detector. Plastic scintillator modules positioned at specific locations before, between and after the steel plates detect the passage of these muons. Information from these “hits” such as position and time is recorded and used with software tools to reconstruct the tracks of each muon as it passes through the front of Baby-MIND and travels into it, and determine whether it was positively or negatively charged.


Motivations for the Baby-MIND R&D:

  • The Baby-MIND R&D is addressing the issue of determining with some precision wrong sign muon ID (1 in 104) for low momentum muons, initially 0.8 to 5 GeV/c, but the lower limit can be brought down in energy.
  • Latest analyses for the Neutrino Factory and nuSTORM based on multivariate analysis make big assumptions about the digitisation of hits.
    • We need test beam data in a controlled environment to benchmark this analysis
    • Hadronic shower reconstruction in a MIND is another subject which should be investigated in greater detail
  • Hardware is evolving and we want to track these changes to exploit performance enhancements and improve our costing models for much larger MINDs.
    • The Baby-MIND would be the first such MIND with siliconphotomultipliers (SiPM) readout, for example.


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