High power 14 MeV neutron sources for tests of materials.

It is well recognized that a wide program for testing mechanical, electrica l, and other properties of construction materials irradiated by high power 14 MeV neutron fluxes so as the program for creation of low activated new m aterials should be urgently arranged to accumulate required information con cerning materials for DEMO design. In the review paper presented different approaches to the problem of creation of high power 14 MeV neutron source a re discussed.