PREPARATION OF GASEOUS FUEL MIXTURES WITH DIFFERENT AMOUNT OF ADDITIVES FOR THE FORMATION OF ISOTROPIC CRYOGENIC LAYERS FROM HYDROGEN ISOTOPES
A wide range of research in the field of cryogenic layer formation with an isotropic microstructure to create plasma with an intense thermonuclear reaction is the key point in choosing reactor technologies in the program on controlled inertial fusion energy (IFE). To ensure the continuous operation of IFE reactor it is necessary to refuel the fusion zone with a rate of 1 million targets per day. Filling of spherical shells is the first step of the production process. Hydrogen fuel (D-T or D<sub>2</sub>) goes into target shell and then is layered. Standard filling technique is diffusion under gaseous fuel pressure. Here we discuss the original technology of obtaining the required fuel structure due to the high cooling rates of a spherical shell containing fuel and doping gases. This approach allows one to form an ultrafine cryogenic layer, stable in a wide temperature range - from 4.2. K to the triple point of the used fuel substance. Since doping gas is needed not only to obtain an ultrafine layer, but also to stabilize its structure, the stage of filling the doping gas in different composition and quantity is of particular importance in the production chain «fuel filling-fabrication of ultrafine cryogenic layer», and stands out in a separate direction in the fuel target technology. This article is dedicated to the solution of this problem.