Difference between revisions of "FDC Backgrounds"
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| + | * ''These rates seem '''incredibly''' high''. | ||
* Is the maximum number of hits coded into the simulation sufficient for the FDC? If it is applied at the event level, 100 hits is probably not enough. | * Is the maximum number of hits coded into the simulation sufficient for the FDC? If it is applied at the event level, 100 hits is probably not enough. | ||
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== Plots == | == Plots == | ||
Revision as of 16:33, 15 January 2007
Back to Background Rate Studies
Detector Configuration
- Double-Hit Resolution: 250 ns
- Threshold: 1 keV
- Strip Threshold: 5 mV
- Maximum Number of Hits: 100
Items for Discussion
- These rates seem incredibly high.
- Is the maximum number of hits coded into the simulation sufficient for the FDC? If it is applied at the event level, 100 hits is probably not enough.
Plots
A plot of the rate as a function of anode wire number for the most dowstream anode plane (blue), the most upstream anode plane (red), and the average rate (black).
A plot of the rate as a function of cathode strip number for the most dowstream cathode plane (blue), the most upstream cathode plane (red), and the average rate (black).
A plot of the rate within 5 cm of the beam axis as a function of the plane number if the FDC. Planes for which N%3 == 2 are anodes, all other planes are cathodes. The notable increase in rate for the downstream chambers could be due to opening of charged particles in the relatively weaker field.
A double-log plot of the energy of all hits in the FDC. The spectrum cuts off at 1 keV due to the GEANT threshold.
