Inelastic Detectors

1
Inelastic Detectors Events

• Veto for Elastic Events
• Indication of Beam Quality
• Beam Luminosity?
• Size of IR?

2
Inelastic Detector Layout
Segments Each with PMT
Sector 1 Yellow - N RP 3
Sector 2 Blue P RP 1
1
2
3
4
Inelastic Detector
3
ADC TDC Pedestals
4
Problems With TDC 3

• Pedestal (overflow) occurs in Halo data
  region
• All TDC tip33 data are in channels 182 186

5
Inelastic TDCs
6
Cut Out Halo Events
7
Inelastic Event Correlations
8
Cut Where Halo Overlaps
9
Halo Hit Patterns
10
All Events Excluding Pedestals
11
Rejected TDC Events
12
All Rejected Events
13
Accepted Inelastic Events
14
All Accepted Events
15
All Elastic Detector Events
16
Elastic ? Inelastic Events

• Events that Elastic scintillators (alone) would
  select as good events
• But, the event also satisfies the Inelastic Cuts

17
Elastic ? Halo Events

• Elastic events correlated with Inelastic Halo
  events
• Only one event in this category!

18
Summary

• Determined Inelastic Cuts ? Events
• Can Be Used To Veto Elastics
• Not many events will be effected
• Needs to go the other way
• Include Efficiency Size ? Luminosity
• IR Size ? Look at TDC Differences?
• Calibrate TDCs
• Determine cable lengths