hw:lab:spectrochain:script
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hw:lab:spectrochain:script [2009/09/15 07:48] szymon.kulis |
hw:lab:spectrochain:script [2019/03/08 14:08] (current) |
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| ==== Linearity check of pre amplifier ==== | ==== Linearity check of pre amplifier ==== | ||
| - | Perform measurements of pulse amplitude at the preamplifier output for the set of input test pulse amplitudes. The obtained results write to file ''preamp.dat'' in following format: | + | Perform measurements of pulse amplitude at the preamplifier output for the set of input test pulse amplitudes. The obtained results write to file ''linearity.dat'' in following format: |
| <code> | <code> | ||
| #vin[mv] vout[v] | #vin[mv] vout[v] | ||
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| Look at the first shaper stage output. Check whether the displayed time is equal to the peaking time (time after which pulse reaches its maximum). Look at the pulses at the outputs of subsequent stages. Find their peaking times and see how they are related to the shaping time constant. Try to set the same peaking times for different shaping orders and compare the pulse shapes. | Look at the first shaper stage output. Check whether the displayed time is equal to the peaking time (time after which pulse reaches its maximum). Look at the pulses at the outputs of subsequent stages. Find their peaking times and see how they are related to the shaping time constant. Try to set the same peaking times for different shaping orders and compare the pulse shapes. | ||
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| ==== Noise performance ==== | ==== Noise performance ==== | ||
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| To analyse the measured data use script ''noise.gnu''. See the results in the file ''noise.png''. Are you able to show the optimum shaping time for each filter order ? Does it pay off to use higher shaper orders for noise reduction ? | To analyse the measured data use script ''noise.gnu''. See the results in the file ''noise.png''. Are you able to show the optimum shaping time for each filter order ? Does it pay off to use higher shaper orders for noise reduction ? | ||
| + | ==== Observing pulses from source ==== | ||
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| + | Uda sie zorganizowac zrodlo ? | ||
| ==== Discussions topics==== | ==== Discussions topics==== | ||
| - | * What is main uncertainty source during gain measurements in such setup? | + | * What is main uncertainty source during gain measurement in such setup? |
| - | * During this laboratory we were investigating electronic noises. You have to remember that in real experiments You also have to fight with disturbances. Can You give an example of disturbances in real world ? | + | * During this laboratory we were investigating electronic noises. You have to remember that in real experiments You also have to fight with disturbances. Can You give an example of disturbances in real experiment? |
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