Concept of the mixine for the Galatea experiment reactor

The concept of the mixine (a conductor with a current immersed into a plasma) for the Galatea experimental reactor with the pulse duration about 1000 s is presented. The design of the three-zone radiation-accumulative mixine with a superconducting chord is described. The external (red) zone, made of tungsten, has the thickness of 15 cm and is heated up to the temperature of ∼ 2000 K. It is able of emitting up to 90% of the current flow falling thereon from the plasma. The next layer (grey) is separated from the external one by a multilayer vacuum shield with thermal isolation. The grey stainless steel layer thickness is equal to 45 cm. This zone should decrease the energy flow into the superconductor approximately by 100 times. The third (blue) zone is cryo-zone. It is also made of stainless steel and has the thickness of 25 cm. The superconducting coil of Nb3Sn is immersed into the mixture of liquid and solid hydrogen. The heat flows from the neutrons and gamma-quanta are evaluated