CAPILLARY DETECTORS FOR HIGH-RESOLUTION TRACKING

We present a new tracking device based on glass capillary bundles or l ayers filled with highly purified liquid scintillator and read out at one end by means of image intensifiers and CCD devices. A large-volume prototype consisting of 5 x 10(5) capillaries with a diameter of 20 m u m and a length of 180 cm and read out by a megapixel CCD has been te sted with muon and neutrino beams at CERN. With this prototype a two t rack resolution of 33 mu m was achieved with passing through muons. Im ages of neutrino interactions in a capillary bundle have also been acq uired and analysed. Read-out chains based on Electron Bombarded CCD (E BCCD) and image pipeline devices are also investigated. Preliminary re sults obtained with a capillary bundle read out by an EBCCD are presen ted.