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Salman Khan
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If pulse source output is recorded by a detector on oscilloscope, is it possible to calculate dose from this output voltage pulse?
In case of PMT or other solid state detector?Alex A said:That depends on the detector and any amplifier. For an ion chamber it would be the total charge transferred, which would be the area under the curve on an oscilloscope trace under some circumstances, or the height of the pulse in others.
A Geiger counter tube would not work. Some other forms of detector might work, but interpreting the result might be challenging.
The voltage scale on an oscilloscope is typically measured in volts per division. To calculate the voltage scale, divide the total range of the vertical axis (in volts) by the number of divisions on the screen. For example, if the vertical range is 10 volts and there are 5 divisions on the screen, the voltage scale would be 2 volts per division. The time scale is typically measured in seconds per division. To calculate the time scale, divide the total time of the horizontal axis (in seconds) by the number of divisions on the screen.
The sampling rate of an oscilloscope refers to how many times the waveform is sampled per second. To determine the sampling rate, divide the total time of the horizontal axis (in seconds) by the number of samples displayed on the screen. For example, if the horizontal axis is 10 milliseconds and there are 100 samples displayed on the screen, the sampling rate would be 10,000 samples per second.
Real-time sampling is when the oscilloscope captures and displays the actual waveform in real-time. This is useful for observing fast-changing signals. Equivalent-time sampling is when the oscilloscope takes multiple samples of the same signal over a longer period of time and then combines them to display the waveform. This is useful for capturing and analyzing signals that occur less frequently.
The rise time of a signal is the time it takes for the signal to rise from 10% to 90% of its maximum amplitude. To calculate the rise time, measure the time it takes for the signal to rise from 10% to 90% on the oscilloscope's time scale and multiply it by the time scale setting. For example, if it takes 2 milliseconds for the signal to rise from 10% to 90% and the time scale is set to 0.5 milliseconds per division, the rise time would be 4 milliseconds.
The trigger level on an oscilloscope is used to stabilize the waveform on the screen. To adjust the trigger level, first select the channel you want to trigger on. Then, adjust the trigger level knob until the waveform is stable on the screen. You can also adjust the trigger level by using the up and down arrows on the trigger menu and selecting a specific voltage level.