Principle of the detector
large number of small diameter scintillating fibres and
highly integrated readout through optoelectronic devices
(e.g. 5 x 10^5 capillaries of 20 micron inner diameter are read out
by a single image intensifier chain of 40 mm input window)
SCIFI DETECTORS can be built using glass fibres,
plastic fibres or glass capillaries filled
with liquid scintillator
Why Capillaries ?
fast response (as for plastic fibres)
high reflectivity of core-cladding interface (light loss per reflection
~10^-6)
attenuation length (>~3 m) even in thin fibres
high spatial resolution} related to the small fibre diameter and the
readout resolution
radiation hardness > 100 Mrad
high hit density allowing the reconstruction
of track vectors in thin capillary layers
