Present status on neutronics concerning with nuclear fusion reactor is described. Emphasis put on Japanese activities for nuclear heating, tritium breeding, induced activities and radiation shielding.
Fundamentals and present status of fusion product diagnostics in the case of magnetic confinement system are reviewed. Methods of diagnosing fusion products, i. e. neutrons and fast charged particles, are presented for DD, D3He and DT plasmas.
Application of surface deposition probe to the study of plasma-wall interactions in torus devices is reviewed. Various surface analysis techniques have been utilized to detect information from the surface of the deposition probes. Interactions of plasma with first wall surfaces are very complicated, since various particles bombard the surface simultaneously with different energies and fluxes. With use of fine surface probes and analysis techniques we have tried to clarify elementary processes of plasma surface interactions.
The mechanisms of growth and saturation in the free electorn lasers are studied by the slab model, two-and-one-half dimensional particle simulation, of which code is newly developed. The amplified coherent electoromagnetic wave is identified to be generated by the Raman scattering of the Stokes type. The growth rate, the frequency, and the wave number are compared with the theoretical values.