2009 - potential performance

Let's say 4 weeks to establish first collisions at 5 TeV, optimistically this would be completed by mid-October.

Finish 20th December say - 65 days for physics - absolute maximum

Enter into pilot physics phase for 30 days:

• Interleaved physics and commissioning
• Push number of bunches, intensity, squeeze…
• up to a maxiumum of 156 x 156 bunches with say 4 x 10¹⁰ protons per bunch β* = 4 m.
• Peak luminosity: ~1.2 x 10³¹
• Integrated: few pb^-1

Pushing the bunch intensities with 156 x 156 with reasonable operational efficiency for another 30 days would see 30-40 pb-1

• 8 hour fill length, 4 hour turn around, 20 hour luminosity lifetime, 30 days of physics
• 5 10³¹ luminosity with  9 x 10¹⁰ protons per bunch β* = 4 m.  (or variation)
• gives around 40 pb^-1 with 60% operational efficiency

Take out 15 days for access, cryogenics etc.

Mike Lamont
January 2009