In order to understand the phenomenon of particle emission from plasma facing materials by high heat load, laser beam irradiations were carried out for graphite IG-110U, 304SS and molybdenum. Emission of neutral atoms, ions and thermal electrons was detected with a fast-response quadrupole mass spectrometer (QMS) and a current meter connected to the specimen. The neutral particles emitted continuously had an energy depending on the surface temperature. Ions were emitted intermittently during heat loading. From the time of flight, the energy of the ions was estimated to be on the order of a few to 10 eV. The influence of a bias voltage applied to the specimen on the emission of particles was also investigated.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering