The lab manual can be downloaded at the bottom of this page.
For completeness, a brief description of the four tabs and the underlying data generator is provided below.
Tabbladen
Single Detector
In this setup, one detector plate is connected (shown on the left). On the right, you see the electronics box. On the electronics box, you can adjust the detector’s photo multiplier tube high voltage on the right side. As with the real setup, the actual high voltage is a factor of 1000 higher. The initial value is 1.10 volts.
On the left side of the electronics box, you can adjust the threshold voltage. From this voltage onward, the counter registers the signal from the detector. The starting value is 0.10 volts. For most experiments, the standard threshold voltage is 0.20 volts. In the middle, you will find the counter, along with the Start/Stop and Reset buttons.
Single Absorption
In various guest lectures/experiments, you are asked to sit on the detector to determine the absorption of the human body. In this setup, a block has been placed on the detector (shown on the left) that absorbs part of the radiation. The functionality of the electronics box is the same as in the Single Detector setup.
Coincidence
Since a single detector plate also measures noise, it is better to perform a coincidence measurement using two detector plates. On the left, the two detector plates are stacked on top of each other. On the right is the electronics box. The functionality of the electronics box is now expanded with an additional high voltage (bottom right) and threshold voltage (bottom left) for the lower detector plate.
Coincidence Absorption
In this setup, a block has been placed on the detectors (shown on the left) that absorbs part of the radiation. The functionality of the electronics box is the same as in the Coincidence setup.
Data generator
The measurement results for the different experiments (and different high and threshold voltages) do not come from a database. They are generated anew each time using a random number generator, which produces random numbers according to a Poisson distribution. The parameters of this Poisson distribution have been predetermined by performing the various experiments with different settings.
