Features
- Low noise design: better than 600 eV (Ge) at Cs = 0 pF
- Fast rise time: better than 20 ns at Cs = 0 to 30 pF
- Count rate capability >200 000 counts/s (60Co)
- Count rate overrange indicator
- Detector bias filter rated to ±5000 V dc
- Separately terminated energy and timing outputs
- Diode protected FET Input
Description
The CANBERRA Model 2002 is a low noise, high speed preamplifier designed for
high resolution gamma spectroscopy and timing measurements using cooled Ge semiconductor
detectors. The preamplifier converts the ionization charge developed in the
detector during each absorbed nuclear event to an output pulse whose amplitude
is proportional to the total charge accumulated in that event. The pulse decays
exponentially with a time constant of 50 µs (nominal) to segregate successive
events in high count rate applications.The preamplifier includes a low noise
FET input circuit optimized for the ultra-high source impedance of germanium
detectors. The charge amplifier and buffer stages have been designed for both
the low noise and high speed performance needed for precise energy and timing
spectroscopy. In addition, a special circuit monitors the activity of the detector,
and warns when improper operating conditions exist. A high voltage filter insures
a noise-free power source for the detector.
Note to our International Customers: If you
would like a quote on this product, please contact
your Local Sales Office for assistance.
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| 2002: Ge Detector Preamplifier |