Silicon Microstrip Detectors (ISIM and
OSIM)
Bari-Trieste
collaboration
Silicon Microstrip Detectors will be used as the
vertex detectors
(ISIM) and as the first element of the outer tracking system
(OSIM) for FINUDA.
ISIM is arranged along a parallelepiped having an
octogonal section in the interaction region, just before the target. It will
provide information about hypernucleus position by means of the charged Kaons
trajectory.
OSIM is arranged along a parallelepiped having a decagonal
section which will provide the measurement of the momenta of the pion emitted in
the hypernucleus formation reaction.
They consist of double sided silicon
microstrip detectors 0.03 cm thick, having a high spatial resolution (few
microns) and a good efficiency for charge impinging particles.
ISIM and OSIM
are modular:
each module is obtained by micro-bonding together 3 units of Si detector. A
module have an active surface of 196 mm (along the beam direction) x 52 mm
(along the perpendicular direction). The unit detector is a double sided silicon
microstrip detector, 0.03 cm thick and with a surface of 52.6 mm x 65.4 mm.The
pitch between two strips is 0.05 mm and the strip width about 0.006 mm.
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