Is it possible to produce next generation of UCN sources with a density 103-104 cm-3?
Serebrov A. P., Mityukhlyaev V. A., Zakharov A. A., Nesvizhevsky V. V., Kharitonov A. G.
The analysis of evolution of UCN sources is presented. It is shown that the gain factor of about 10 and the UCN density of about 10 -10 cm can be obtained by means of solid D2 at 4 K.