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ウエダ ヨシオ
Ueda Yoshio
上田 良夫 所属 追手門学院大学 理工学部 電気電子工学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2019/05 |
| 形態種別 | 論文 |
| 査読 | 査読あり |
| 標題 | Estimation of suppressed erosion by vapor shielding at Be and W walls under transient loads |
| 執筆形態 | 共著・編著（代表編著を除く） |
| 掲載誌名 | Nuclear Fusion |
| 掲載区分 | 国外 |
| 巻・号・頁 | 59(7) |
| 著者・共著者 | Kenzo Ibano,Yusuke Kikuchi,Satoshi Togo,Yoshio Ueda,Tomonori Takizuka |
| 概要 | In this study, we developed a particle-in-cell simulation code for the vapor shielding, PIXY, and applied the code to the erosion estimation for Be and W walls under a pulsed heat flux of 1-20 GW m-2 within 0.2 ms, which simulates a short-duration ELM pulse. Heat fluxes reaching the wall are recorded separately for electrons and ions, and reveal effective physical processes during the vapor shielding at Be and W walls. Then, for these walls, the total erosion amounts with and without vapor shielding are evaluated and compared. Estimated total erosion is larger for the Be wall up to 10 GW m-2. The Be wall erosion becomes saturated for the heat flux >10 GW m-2 due to its effective shielding, while the estimated W wall erosion eventually overcomes the Be wall erosion. In the short-time scale studied in this paper, effective radiation cooling by W vapor clouds is not observed. |
| DOI | 10.1088/1741-4326/ab0977 |
| ISSN | 0029-5515/1741-4326 |