Abstract
The OPERA experiment is designed to clarify neutrino oscillation by detecting appearance of ντ in pure νμ beam through a long baseline method (CNGS beam from cern to the Gran Sasso laboratory). The key technique is the use of emulsion films and their scanning. We developed a new high speed scanning system with speed of 50 cm2/h and it was successfully demonstrated in 2006 CNGS commissioning. The new scanning system is not only meant for the OPERA experiment, but it has large potential of applications. For example, measurement of νe with strong separation power against π0. Or a compact emulsion spectrometer for future neutrino experiments.
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