  The NA62 experiment is a fixed-target experiment at CERN SPS. The main goal
of the experiment is to measure the branching ratio of the ultra-rare kaon
decay $K^{+}\to\pi^{+}\nu\bar\nu$. The NA62 detector allows also to study other
rare kaon decays and to search for very weakly coupled particles of MeV-GeV
mass-scale. The new ANTI-0 hodoscope is proposed and designed to veto events
with charged halo particles entering the decay volume. It is now being
assembled at CERN. The detector design, the performance simulation and the
results of measurements with cosmic rays and test beams for the individual
elements are presented. The commissioning and the first run of data-taking is
scheduled for after the end of LS2 long shutdown (April 2021).
