Title: The Beam and detector of the NA62 experiment at CERN,
Abstract: NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements
of rare kaon decays. Such measurements, like the branching fraction of the
$K^{+} \rightarrow \pi^{+} \nu \bar\nu$ decay, have the potential to bring
significant insights into new physics processes when comparison is made with
precise theoretical predictions. For this purpose, innovative techniques have
been developed, in particular, in the domain of low-mass tracking devices.
Detector construction spanned several years from 2009 to 2014. The
collaboration started detector commissioning in 2014 and will collect data
until the end of 2018. The beam line and detector components are described
together with their early performance obtained from 2014 and 2015 data.