P. Annis et al., A NEW VERTEX DETECTOR MADE OF GLASS-CAPILLARIES, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 386(1), 1997, pp. 72-80
We have developed a new detector technique that allows high quality im
aging of ionizing particle tracks with very high spatial and time reso
lution. Central to this technique are liquid-core fibres of about 20 m
u m diameter read out by an optoelectronic system including a CCD. The
fibres act simultaneously as target, detector and light guides. A lar
ge-volume prototype, consisting of 5 x 10(5) capillaries of 20 mu m di
ameter and 180 cm length, has been tested in the CERN wide-band neutri
no beam. A sample of high-multiplicity neutrino interactions was recor
ded, demonstrating the imaging quality of this detector. First results
from the reconstruction of these events are reported, A track residua
l of 28 mu m and a vertex resolution of 30 mu m has been achieved. Fut
ure applications of capillary detectors for neutrino and beauty physic
s are being investigated within the framework of the RD46 collaboratio
n.