The PSI-1 facility for studying plasma/wall inter-action is described. It uses a direct current arc as a plasma generator together with a hollow anode. The plasma expands through the anode into the target chamber and is confined by an axial magnetic field. The design values for the plasma parameters near the target are ne ≤ 1020 m−3, Te<50 eV, Γ ≤ 6 × 1023 m−2·s−1 and q ≤ 3.5 MW/m2.