CONCEPT AND CHARACTERISTICS OF A SIMULATED LINE SOURCE FOR ANNULAR BLANKET EXPERIMENTS USING AN ACCELERATOR-BASED DEUTERIUM-TRITIUM NEUTRONSOURCE

A pseudoline source is realized by using an accelerator-based deuteriu m-tritium point-neutron source. The pseudoline source is obtained by t ime averaging of the continuously moving point source or by superposit ion of the finely distributed point sources. The line source is utiliz ed for fusion blanket neutronics experiments with an annular geometry to simulate a part of a tokamak reactor. The source neutron characteri stics are measured for two operational modes for the line source: the continuous and the stepwise modes, with activation foil and NE-213 det ectors, respectively. The neutron source characteristic is calculated by a Monte Carlo code to give a source condition for a successive calc ulational analysis of the annular blanket experiment. The reliability of the Monte Carlo calculation is confirmed by comparison with the mea sured source characteristics.