Abstract: The present disclosure relates to a liquid anode radiation source (10) having the ability of turning upside down. The liquid anode radiation source (10) comprises a body (12) equipped with inlet and outlet having a wall (15) limiting the anode space (17), where the outlet connected to the inlet outside the body (12) will define a continuous flow path closing through the body, the inlet has a wall limiting an internal cross-section changing towards the anode space (17), wherein the cross-section of the inlet a deflector (11) is arranged in a position free of contacting the wall, filling out the cross-section partially and movable to the direction perpendicular to the cross-section; the liquid anode material (14) arranged in the flow path; the circulation unit inserted in the flow path in such a way that it can ensure the unidirectional movement of the anode material in the flow path.