@article{oai:nagoya.repo.nii.ac.jp:00028636, author = {Kajita, Shin and Hwangbo, Dogyun and Ohno, Noriyasu}, issue = {8}, journal = {IEEE Transactions on Plasma Science}, month = {Aug}, note = {In nuclear fusion reactors, unipolar arcing is a longstanding plasma surface interaction issue. In this paper, short summaries of morphology changes by helium plasma irradiation under fusion relevant conditions and ignition of arcing on the He irradiated surfaces are given. Helium plasma irradiation leads to surface morphology changes, and arcing can be ignited on the surface in response to pulsed heat load accompanied by plasma instabilities. Then, we focused on arcing ignited on large-scale fiberform nanostructures (LFNs) formed with deposition of metallic particles together with helium-ion irradiation. Dusts release from the arc spot and the amount of material erosion are discussed based on the experiments.}, pages = {3609--3616}, title = {Ignition and Behavior of Arc Spots on Helium Irradiated Tungsten Under Fusion Relevant Condition}, volume = {47}, year = {2019} }