Record low<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>beating in the LHC

The LHC is currently operating with a proton energy of 4 TeV and ${\ensuremath{\beta}}^{*}$ functions at the ATLAS and CMS interaction points of 0.6 m. This is close to the design value at 7 TeV (${\ensuremath{\beta}}^{*}=0.55\text{ }\text{ }\mathrm{m}$) and represented a challenge for various aspects of the machine operation. In particular, a huge effort was put into the optics commissioning and an unprecedented peak $\ensuremath{\beta}$ beating of around 7% was achieved in a high energy hadron collider.