in progress where the basic principles of fabrication of fine dispersed compounds (solid
solutions) with low doping are employed. This approach is shown to be applied
experimentally using the H 2/HD mixture with the HD concentration less than 1%. As a
result, a transparent solid layer is formed inside a 500 µm glass shell. The layer keeps its
transparency under cycling heating treatment from 5 to 16-20 K. The technique developed …