1180 0 0 0 OA 育児休業のすすめ:ニューヨークで専業主夫になった物理学者
- 著者
- 久保 毅幸
- 出版者
- 日本加速器学会
- 雑誌
- 加速器 (ISSN:13493833)
- 巻号頁・発行日
- vol.20, no.1, pp.50-56, 2023-04-30 (Released:2023-05-16)
- 参考文献数
- 6
The author, a physicist who takes long-term paternity leave of more than two years, tells a life of a stay-at-home dad in New York. The story includes how he has become a stay-at-home dad, his daily routine, and the calamities he encounters daily.
6 0 0 0 OA 対破壊電流密度概観
- 著者
- 久保 毅幸
- 出版者
- 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
- 雑誌
- 低温工学 (ISSN:03892441)
- 巻号頁・発行日
- vol.56, no.5, pp.277-282, 2021 (Released:2021-09-21)
- 参考文献数
- 35
Microscopic theory of the depairing current density (jd) is briefly reviewed for the applied-superconductivity communities. The goal of this article is to introduce the Kupriyanov-Lukichev-Maki theory of jd for s-wave superconductors in the diffusive limit, which is the most reliable calculation of jd based on the BCS theory and is relevant to various superconducting devices. The effect of subgap states on jd is also discussed.
2 0 0 0 OA 超伝導加速空洞の物理と課題、そして性能向上への理論的示唆 ―新規参入の誘い―
- 著者
- 久保 毅幸
- 出版者
- 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
- 雑誌
- 低温工学 (ISSN:03892441)
- 巻号頁・発行日
- vol.54, no.4, pp.275-282, 2019-07-20 (Released:2019-08-01)
- 参考文献数
- 51
- 被引用文献数
- 3 2
We discuss the physics of superconducting resonant cavities for particle accelerators, including the basics of a superconducting cavity, Meissner state stability, and surface resistance together with related scientific and technological challenges. Ongoing research and some proposals for solving the challenges are also discussed.
2 0 0 0 OA 超伝導空洞の物理と窒素インフュージョン:国際リニアコライダー計画の実現に向けて
- 著者
- 久保 毅幸
- 出版者
- 日本加速器学会
- 雑誌
- 加速器 (ISSN:13493833)
- 巻号頁・発行日
- vol.15, no.2, pp.40-51, 2018-07-31 (Released:2021-10-05)
- 参考文献数
- 36
The nitrogen infusion, the recently discovered surface processing method for high-gradient and high-quality factor superconducting cavities, attracts much attention in the particle accelerator community in particular in the context of the International Linear Collider project. In this paper, we briefly review the basics of superconducting cavity, the causes of performance limitation, and the three modern surface processing methods including the nitrogen infusion and resultant cavity performances. The present understanding on physics behind these surface treatments are also discussed.