加速器
Online ISSN : 2436-1488
Print ISSN : 1349-3833
19 巻, 4 号
選択された号の論文の14件中1~14を表示しています
巻頭言
特集 レーザー加速
談話室
  • 守屋 克洋
    2023 年 19 巻 4 号 p. 229-232
    発行日: 2023/01/31
    公開日: 2023/01/31
    ジャーナル フリー

    I took parental leave for about 2.5 months in the spring and summer of 2022. This article describes my experience with the parental leave and with the work I had to do before I went on leave. As long as the duration of the parental leave is known to all concerned and the work is taken over, you can take your childcare leave with peace of mind. Creating handover documents is especially important. This is because you must take over not only in case of injury or illness, but also if you are transferred to a new position. I recommend that you prepare handover documents in advance to ensure peace of mind for both you and those around you. Also, the more important the task, the more you should work together with people of different ages. The timing of life events is different, making it easier for each other to take a paid leave. The parental leave system changed in October 2022. It is now easier to take parental leave than ever before. I hope this will be helpful to men who are considering taking paternity leave and to managers who are thinking about creating a work environment that makes it easier to take childcare leave.

会議報告
新博士紹介
  • 森田 泰之
    2023 年 19 巻 4 号 p. 245-248
    発行日: 2023/01/31
    公開日: 2023/01/31
    ジャーナル フリー

    In order to maximize the performance of accelerators and to make them available for social use, it is essential to improve the control technology of accelerators. Manual tuning has a limit to the number of parameters that can be handled, and it is easy to fall into local maxima. Therefore, we developed a system that automatically tunes multiple parameters simultaneously by using machine learning technology. In this study, we first demonstrated the usefulness of Bayesian optimization by simulating hollow beam transport. After that, we conducted an experiment to tune the ion source by Bayesian optimization. In the experiment, four parameters (gas valve, RF frequency, RF power, and intermediate electrode) were tuned simultaneously, and it was shown that the beam brightness could be tuned as an index in about 1.5 hours.

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