What Limits Total Proton Intensity?
•Maximum number of Protons the Booster can stably accelerate: 5E12
•Maximum average Booster rep. Rate:  formerly 2.5Hz, currently 2 Hz, soon 7.5 Hz
•(NUMI only) Maximum number of booster batches the Main Injector can hold: currently 6, possibly go to 11
•(NUMI only) Minimum Main Injector ramp cycle time (NUMI only): 1.4s+loading time
•Losses in the Booster:
–Above ground radiation
–Damage and/or activation of tunnel components
Our biggest worry at the moment!!!!