@article{oai:repo.qst.go.jp:00048206,
 author = {関, 洋治 and 江里, 幸一郎 and 鈴木, 哲 and 横山, 堅二 and 山田, 弘一 and 平山, 智之 and 関 洋治 and 江里 幸一郎 and 鈴木 哲 and 横山 堅二 and 山田 弘一 and 平山 智之},
 journal = {Fusion Engineering and Design 109–111 (2016) 1148–1152},
 month = {Jan},
 note = {Through R&D for a plasma facing units (PFUs) in an outer vertical target of an ITER full-tungsten (W) divertor, Japan Atomic Energy Agency succeeded in demonstrating the durability of the W divertor shaped by an electrical discharge machining (EDM). To prevent melting of W amours in the PFUs, an adequate technology to meet requirements of a geometrical shape and a tolerance is one of the most important key issues in a manufacturing process. From the necessity, the EDM has been evaluated to control the final shape of the W amour. Though the EDM was known to be advantages such as an easy workability, a potential disadvantage of presence of micro-cracks on the W surface appeared. In order to examine a potentially effect of the micro-crack on a heat removal durability, a high heat flux testing was carried out for the W divertor mock-up with the polish and the EDM. As the result, all of the W armours endured the repetitive heat load of 1000 cycles at an absorbed heat flux of more than 20 MW/m^2, which strongly encourages the realization of the PFUs of the ITER full-W divertor with the various geometrical shape and the high accuracy tolerance.},
 pages = {1148--1152},
 title = {A study of plasma facing tungsten components with electrical discharge machined surface exposed to cyclic thermal loads},
 volume = {109-111},
 year = {2016}
}