Difference between revisions of "Setup and tests"
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|width="415pt"|[[Image:setup1.jpg|thumb|none|400px|Setup of the new prototype.]] | |width="415pt"|[[Image:setup1.jpg|thumb|none|400px|Setup of the new prototype.]] | ||
|width="415pt"|[[Image:setup2.jpg|thumb|none|400px|Setup of the new prototype.]] | |width="415pt"|[[Image:setup2.jpg|thumb|none|400px|Setup of the new prototype.]] | ||
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| + | = HV-plateau curve and Noise vs HV = | ||
| + | {| border="1" cellpadding="2" | ||
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| + | |width="415pt"|[[Image:hv-curve.jpg|thumb|none|400px|Tracked cosmic rays vs HV (normalized).]] | ||
| + | |width="415pt"|[[Image:noisevshv.jpg|thumb|none|400px|Pedestal mean vs HV.]] | ||
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| + | |} | ||
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= Check if 125 MHz clock is working with a 300 MHz block pulse input = | = Check if 125 MHz clock is working with a 300 MHz block pulse input = | ||
Revision as of 11:16, 9 March 2009
Contents
First Fe-55 spectrum
HV-plateau curve and Noise vs HV
Check if 125 MHz clock is working with a 300 MHz block pulse input
Pedestal
The pedestal mean was between 993 and 1365 channels at Aug 2008 with all channels working. Now the pedestal mean is between 0 and 437 channels. This mean I have to move the baseline up a little bit...but the spread of the mean did not change.
Pedestals when the HVB is connected to the CDC
Pedestal vs time (1000 event runs) is plotted.
Channels 12-13-14 show some (signs of) problems:
Pedestals when HVB is not connected
Pedestal vs time (1000 event runs) is plotted.
Channels 12-13-14 show some (signs of) problems:
Old pedestals versus time (Aug 2008)
Some sample signals
Energy spectra (not tracked)
