N

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n1 The effective mechanical aperture n1 defines the maximum primary collimator opening in terms of the rms beam size that still guarantees a protection of the machine aperture against losses from the secondary beam halo. It depends on the magnet aperture and geometry and the local optics perturbations
Nb Number of particles per bunch.
n Number of bunches per beam.
Nominal bunch Bunch parameters required to reach the design luminosity of L = 1034cm-2s-1 with β* = 0.55 m. The nominal bunch intensity is Nb = 1.15 × 1011 protons.
Nominal powering Hardware powering required to reach the design beam energy of 7 TeV.

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