Ultra-Peripheral Collisions Trigger
Level 0
Back to back hits in
Central Trigger Barrel
Coincidence
1 North + 1 South hit
Veto on top + bottom
(reject cosmic rays)
Rate 20-40 Hz
Level 3-online reconstruction
Vertex position
Charged multiplicity
Accepted 1-2 Hz
Data Set
~ 7 hours of dedicated data collection
30,000 trigger
Previous slide
Next slide
Back to first slide
View graphic version