Abstract: Micro-cooling device comprising:—an elongate body having a first end and an opposite second end;—an evaporation chamber arranged at the first end of the elongate body;—a feed channel arranged between a feed opening, for feeding a high pressure cooling medium, at the second end of the elongate body and the evaporation chamber;—a discharge channel arranged between the evaporation chamber and a discharge opening at the second end of the elongate body;—a restriction arranged in the feed channel and adjacent to the evaporation chamber;—temperature equalization means for equalizing the temperature over a isothermal zone extending from the first end to a first zone of the feed channel upstream of the restriction.