Irradiation experiments of divertor pebbles

摘要

A multi-layer coated pebble is the essential component of the pebble drop divertor system. For the test of the integrity of the multi-layer structure, two types of pebble were fabricated and irradiated by high flux beams. The one has a SiC kernel, and the other has a carbon kernel. Each type of pebble had a SiC tritium permeation barrier layer and a graphite plasma facing layer.