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EMI-II: a phase-two external muon identifier for the 15-foot bubble chamber at Fermilab

Technical Report ·
OSTI ID:6126034
This paper outlines recommendations to Fermilab for the improvement of the present External Muon Identifier (EMI) which has been in use with the 15-foot FNAL bubble chamber for several experiments (E-45, E-180, and E-28). This is an appropriate time to review the status of the EMI since there is now operational experience and experimental data to take the place of Monte Carlo predictions. Another important factor is the new physics objectives of the neutrino program: at the time EMI-I was proposed and authorized only single-muon neutrino interactions were considered. Now we know about neutral current interactions and dimuons. These are among the most exciting current topics of neutrino physics. We start off with a brief recapitulation of the initial EMI design objectives and the authorization to build a Phase I single-plane EMI of 30 m/sup 2/. We discuss briefly operational experience with the EMI. Experimental results on single-muon detection efficiency are compared with Monte Carlo predictions. The present capabilities of EMI-I for neutral currents are assessed. Recommendations for an EMI improvement program are detailed on a short-range and long-range basis.
Research Organization:
Hawaii Univ., Honolulu (USA). Dept. of Physics and Astronomy
DOE Contract Number:
AC03-76ER00511
OSTI ID:
6126034
Report Number(s):
UH-511-212-76; ON: DE81023638
Country of Publication:
United States
Language:
English