Transcript particle detector

Particle Detector
To detect scattered ions, recoiling target nuclei, decay particles and
to allow for -ray Doppler shift corrections, a position-sensitive
semiconductor ring counter will be used - a Double-Sided Silicon
Strip Detector (DSSSD) with compact disc geometry.
• Theory
The DSSSD is made up of a
number of semiconducting strips,
cross-laid on each side. An applied
bias voltage depletes the full
detector, so when a particle hits the
detector, electron-hole pairs are
created. They start to drift in the
electric field and cause a charged
pulse that can be detected. The
particle position is determined in
one dimension on each side of the
strip.
• Data
Total area = 50 cm2 (93% active)
16 annular p+ strips/quadrant
24 sector n+ strips/quadrant
In total 160 discrete detectors
Wafer thickness 35 - 1000 m
E-E mounting