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j.nimb.2019.09.036.pdf | 6.33 MB | Adobe PDF | 見る/開く |
タイトル: | Slow-positron beamline temperature rise reduction at Kyoto University Research Reactor |
著者: | Yabuuchi, A. Naka, R. Sato, K. Xu, Q. Kinomura, A. |
著者名の別形: | 籔内, 敦 徐, 虬 木野村, 淳 |
キーワード: | Research reactor Slow positron beam Cadmium Nuclear heating Thermal conductivity Helium gas |
発行日: | 15-Dec-2019 |
出版者: | Elsevier BV |
誌名: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
巻: | 461 |
開始ページ: | 137 |
終了ページ: | 141 |
抄録: | Temperature rises of a reactor-based slow-positron beamline at Kyoto University Research Reactor (KUR) were measured during reactor operation and solenoid-coil excitation. During KUR operation at 5 MW, the temperature of the top of the beamline reached 300 °C. This temperature which is close to the melting point (321 °C) of Cd was used to enhance positron generation. On the other hand, the temperature of the flange supporting the beamline was approximately 50 °C and it was sufficiently low in terms of the strength of the beamline. The temperature of the top of the beamline was successfully reduced to 240 °C by introducing a He gas flow around the vacuum duct of the beamline. Beamline temperatures calculated using a finite element method were in agreement with measured temperatures. Such calculation is useful for future experiments with longer or irregular KUR operation. |
著作権等: | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The full-text file will be made open to the public on 15 December 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/244331 |
DOI(出版社版): | 10.1016/j.nimb.2019.09.036 |
出現コレクション: | 学術雑誌掲載論文等 |
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