TRACKING WITH CAPILLARIES AND LIQUID SCINTILLATOR

The technique of glass capillaries filled with liquid scintillator all ows the reconstruction of ionizing particle tracks with high spatial r esolution. Detectors based on this technique consist of coherent array s of capillaries having diameters of the order of 20 mu m. Light signa ls are amplified by an optoelectronic chain composed of a series of im age intensifiers: the readout is performed through a CCD. The ongoing research in the field of liquid scintillators has led to excellent res ults in terms of information density (greater than or equal to 5 hits/ mm) and radiation resistance (order of 1 MGy). In this paper new resul ts about the effect of ageing and purification of liquid scintillators will be presented. The RD46 collaboration has developed a completely new detector having a readout chain composed of only one image intensi fier followed by a new device: a Megapixel Electron Bombarded CCD. Fir st images of neutrino interactions will be shown, together with prelim inary measurements of the resolution of the detector.