Radiation Detectors
PROPORTIONAL COUNTER CIRCUITRY
PROPORTIONAL COUNTER CIRCUITRY
Proportional counters measure different types of radiation.
EO 2.2
Given a block diagram of a proportional counter circuit,
STATE the purpose of the following major blocks:
a.
Proportional counter
b.
Preamplifier/amplifier
c.
Single channel analyzer/discriminator
d.
Scaler
e.
Timer
Proportional counters measure the charge produced by each particle of radiation. To make full
use of the counter’s capabilities, it is necessary to measure the number of pulses and the charge
in each pulse. Figure 9 shows a typical circuit used to make such measurements.
Figure 9 Proportional Counter Circuit
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