Difference between revisions of "CDC peak lengths"
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− | + | Max drift time (according to Garfield) is 660ns | |
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+ | {| border="0" cellpadding="2" | ||
+ | |+Peak length (ending at last sample decreasing >15) | ||
+ | |[[Image:pklength_maxamp20_bindiff15.png|thumb|x250px|Peak length vs max amplitude Ch 20 (straw 17)]] | ||
+ | |[[Image:pklength_drift20_bindiff15.png|thumb|x250px|Peak length vs drift time Ch 20 (straw 17)]] | ||
+ | |} |
Revision as of 17:30, 23 February 2012
To find the peak (signal) length I have to decide where the peak ends and noise takes over.
Histogram of difference between adc sample value and previous sample value for first 190 samples in many events (trigger is approx sample 200 so samples 0-190 should be almost all noise).
Pedestal s.d is 11 (adc value) for these straws in this run. For other straws s.d. ranges from 9 to 13.
Max drift time (according to Garfield) is 660ns