The Australian Contribution to NOMAD

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The main Australian contribution to NOMAD was the assembly and maintenance of the NOMAD veto system. The Australian groups working on NOMAD, from the University of Sydney, the University of Melbourne and ANSTO, assembled and tested the veto during 1993 in time for the neutrino test-beam in November of that year with the detector ready for operation at the beginning of the neutrino run in 1994. The scintillators and photomultiplier tubes that were used in the veto were provided by the Padova group of the NOMAD collaboration and had been used before in a neutron-antineutron oscillation experiment at a nuclear reactor in Grenoble (references: M. Baldo Ceolin et al., Zeit. fur Phys. C 63 (1994) 409; and M. Baldo Ceolin et al., Nuovo Cimento A 105 (1992) 1679.).

The veto was in front of the NOMAD magnet and was one of the most visible parts of the whole detector. It featured in the cover of the March, 1994 issue of the CERN Courier as is visible from the figure below.