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Two high-energy neutrino events with three muons in the final state are presented. Some examples of possible origins are also discussed.

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This system extracts up to 9.6 µs of 120 GeV beam every 1.87 seconds for the NuMI beamline neutrino experiments. A pulse forming network consisting of two continuous wound coils and 68 capacitors was designed and built to drive three kicker magnets. The field stability requirement is better than ± 1% with a field rise time of 1.52 µs. New kicker magnets were built based on the successful traveling wave magnets built for the Main Injector. Two of these magnets are in series which places a serious constraint on the rise time of the pulser. A forced cooling system using Fluorinert® was designed for the magnet termination resistors to maintain the field flatness and amplitude stability.