“…The rst physics results from the CHORUS experiment have been reported [21] , demonstrating that the experiment as a whole works according to expectation, and that the designed sensitivities will be within reach. The \hybrid" detector concept of combining together information provided by the nuclear emulsion and the scintillating ber trackers has been demonstrated, leading to two other future projects (Fermilab experiments E803/COSMOS [22] and E872/DONUT [23] ) which have adopted similar approaches and techniques.…”