Difference between revisions of "CDC prototype fADC data"

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Fit attempt 2<br/>
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Use pedestal before peak, end of peak, integrated peak. Function fitted to many events for range end-of-peak to final sample  was
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<br/>
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pedestal + 0.0074 * integratedpeak * exp(-0.0056*(x-endpeak)) <br/>where x=sample number.  The constants were the mean values of the fitted function parameters. 
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Revision as of 10:56, 28 October 2011

Data from cosmics with 50/50 gas, 2100V

Event133.png
Event147.png
Event167.png
Event266.png
Event428.png
Event334.png
Event2411.png
Event704.png
Histogram of first max in amplitude exceeding pedestal + 5 sigma

Fit attempt 1
Use pedestal before peak, max peak amplitude, end of peak. End of peak is 2 samples after the last sample where ADC value is at least 20 less than the previous sample. Function fitted to many events for range end-of-peak to final sample was pedestal + 0.14 * maxamp * exp(-0.0056*(x-endpeak)) where x=sample number. The constants were the mean values of the fitted function parameters.

1exp.png
Fit133.png
Fit147.png
Fit167.png
Fit266.png
Fit428.png
Fit334.png
Fit2411.png
Fit704.png

Fit attempt 2
Use pedestal before peak, end of peak, integrated peak. Function fitted to many events for range end-of-peak to final sample was
pedestal + 0.0074 * integratedpeak * exp(-0.0056*(x-endpeak))
where x=sample number. The constants were the mean values of the fitted function parameters.

1exp-int.png