  A new type of fast luminosity separation scans ("Emittance Scans") was
introduced at the CERN Large Hadron Collider (LHC) in 2015. The scans were
performed systematically in every fill with full-intensity beams in physics
production conditions at the Interaction Point (IP) of the Compact Muon
Solenoid (CMS) experiment. They provide both emittance and closed orbit
measurements at a bunch-by-bunch level. The precise measurement of beam-beam
closed orbit differences allowed a direct, quantitative observation of
long-range beam-beam PACMAN effects, which agrees well with numerical
simulations from an improved version of the TRAIN code.
