Difference between revisions of "FDC Backgrounds"

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(FDC)
(FDC)
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Back to [[Background Rate Studies]]
 
Back to [[Background Rate Studies]]
  
== FDC ==
 
  
Detector Configuration:
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== Detector Configuration ==
  
 
* Double-Hit Resolution:  250 ns
 
* Double-Hit Resolution:  250 ns
 
* Threshold:  1 keV
 
* Threshold:  1 keV
 
* Strip Threshold:  5 mV  
 
* Strip Threshold:  5 mV  
** Where is this applied?  What is assumed about electronics?
 
 
* Maximum Number of Hits:  100  
 
* Maximum Number of Hits:  100  
** Is this at the event level?  If so, 100 is probably not large enough.
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== Items for Discussion ==
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* 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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* These rates seem ''incredibly'' high.
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== Plots ==
  
 
[[Image:fdc_rate_v_wire.jpg|frame|center|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).]]
 
[[Image:fdc_rate_v_wire.jpg|frame|center|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).]]

Revision as of 16:25, 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

  • 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.
  • These rates seem incredibly high.

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.