Difference between revisions of "Setup and tests"
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+ | = Fe-55 spectra (simulated)= | ||
+ | Below are GARFIELD simulated Fe-55 spectra. The gas gain used is 1.65x10^5 | ||
+ | {| border="1" cellpadding="2" | ||
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+ | |width="415pt"|[[Image:fe55-amplit-sim.jpg|thumb|none|400px|Fe-55 induced amplitude spectrum (simulated).]] | ||
+ | |width="415pt"|[[Image:fe55-energy-sim.jpg|thumb|none|400px|Fe-55 induced energy spectrum (simulated).]] | ||
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= HV-plateau curve and Noise vs HV = | = HV-plateau curve and Noise vs HV = |
Revision as of 13:19, 18 March 2009
Contents
First Fe-55 spectrum
Fe-55 spectra
Fe-55 spectra (simulated)
Below are GARFIELD simulated Fe-55 spectra. The gas gain used is 1.65x10^5
HV-plateau curve and Noise vs HV
Different symbols are different channels/straws.
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)