METHOD FOR CREATING THE RECEIVING PLATE OF THE TOKAMAK DIVERTOR Russian patent published in 2023 - IPC C23C16/14 G21B1/13 

FIELD: thermonuclear engineering.

SUBSTANCE: invention relates to the field of thermonuclear technology and can be used to create a receiving plate of a tokamak divertor based on the concept of the current layer of liquid lithium. A copper substrate is placed in a reaction chamber with heated walls, first a vacuum is created in it, and then hydrogen is fed into it at a speed of 3 l/h to a pressure of 5 mm Hg with simultaneous activation of the wall heaters, thus heating the substrate to a temperature of at least 500°C and no more than 0.8 of the absolute melting point of copper. The substrate is kept at this temperature for no more than 1 h. After that, the hydrogen supply rate is increased to 9 l/h and tungsten hexafluoride is introduced from a vessel preheated to a temperature not exceeding 50°C at a speed of 3 l/h so that the total gas pressure in the mixture remains constant and equal to 5 mm Hg, and the volume ratio is WF₆:H₂ is equal to 1:3. Thus, tungsten is applied to the substrate by decomposition of tungsten hexafluoride for at least 3 hours. The thickness of the tungsten layer is at least 30 mcm and no more than 0.5 mm. Further, the supply of hydrogen and tungsten hexafluoride is stopped and a vacuum is created in the reaction chamber. Cooling is carried out in a hydrogen environment, for which it is again fed into the reaction chamber to a pressure of at least 200 mm Hg.

EFFECT: resulting receiving plate of the tokamak divertor has improved performance due to good thermal conductivity, resistance to thermal cycling and corrosion resistance to lithium, which improves its service life.

1 cl, 6 dwg, 2 tbl, 2 ex