Experience with the ATS optics

The Achromatic Telescopic Squeezing (ATS) scheme is a novel optics concept which was built up in order to cope with the optics requirements of the HL-LHC, i.e. a clean (achromatic) and strong reduction of [3* compared to the LHC nominal optics. This paper will summarize the status of the optics and the experience gained during the 2016 LHC run through a series of dedicated machine development sessions, following the first ATS tests which actually took place in Run I (2011-2012).