Bias Scan Run Results

1
Bias Scan Run Results
2
Looking for ?Gain vs. ?V

• Run 163358
• ?V Last Event
• 0 14517
• -5 24709
• -10 35702
• -15 36062
• Not enough data to get
• a lot of k shorts or
• conversions

• Used all good tracks
• ? lt 1.0
• Central tracks
• d0 wrt beam lt 1 mm,
• Number of COT hits gt 60
• Make sure its a real track
• pt gt 2
• Avoid highly ionizing protons
• Number of SI hits gt 3
• Real SI track

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MPVs for Hits with Different Voltages
?V -5
?V 0
MP27.96
MP28.91
?V -15
?V -10
MP26.85
MP25.63
4
Conclusions

• On Average, the gain
• difference is
• 0.21 ADC counts/Volt
• Checked f and z sides
• separately and they
• agree