Difference between revisions of "Setup and tests"
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+ | = Tilted chamber - tracks at 30 degrees = | ||
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+ | |width="415pt"|[[Image:data-tilted-nottracked.jpg|thumb|none|400px|Tracked cosmic rays vs HV (normalized).]] | ||
+ | |width="415pt"|[[Image:sim-tilted-nottracked.jpg|thumb|none|400px|Pedestal mean vs HV.]] | ||
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= HV-plateau curve and Noise vs HV = | = HV-plateau curve and Noise vs HV = |
Revision as of 11:34, 23 March 2009
Contents
- 1 Setup
- 2 Fe-55 spectra
- 3 Fe-55 spectra (simulated)
- 4 Garfield Simulation of signals
- 5 Tilted chamber - tracks at 30 degrees
- 6 HV-plateau curve and Noise vs HV
- 7 Check if 125 MHz clock is working with a 300 MHz block pulse input
- 8 Pedestal
- 9 Old pedestals versus time (Aug 2008)
- 10 Some sample signals
- 11 Energy spectra (not tracked)
- 12 t-Zero spectra
Setup
Fe-55 spectra
Fe-55 spectra (simulated)
Garfield Simulation of signals
Left simulation, right real data. The gas gain used is 1.65x10^5
Tilted chamber - tracks at 30 degrees
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)