Commissioning of a compact multibend achromat lattice: A new 3 GeV synchrotron radiation facility

arXiv - PHYS - Accelerator Physics Pub Date : 2024-07-12 DOI:arxiv-2407.08925

Shuhei Obara, Kota Ueshima, Takao Asaka, Yuji Hosaka, Koichi Kan, Nobuyuki Nishimori, Toshitaka Aoki, Hiroyuki Asano, Koichi Haga, Yuto Iba, Akira Ihara, Katsumasa Ito, Taiki Iwashita, Masaya Kadowaki, Rento Kanahama, Hajime Kobayashi, Hideki Kobayashi, Hideo Nishihara, Masaaki Nishikawa, Haruhiko Oikawa, Ryota Saida, Keisuke Sakuraba, Kento Sugimoto, Masahiro Suzuki, Kouki Takahashi, Shunya Takahashi, Tatsuki Tanaka, Tsubasa Tsuchiyama, Risa Yoshioka, Tsuyoshi Aoki, Hideki Dewa, Takahiro Fujita, Morihiro Kawase, Akio Kiyomich, Takashi Hamano, Mitsuhiro Masaki, Takemasa Masuda, Shinichi Matsubara, Kensuke Okada, Choji Saji, Tsutomu Taniuchi, Yukiko Taniuchi, Yosuke Ueda, Hiroshi Yamaguchi, Kenichi Yanagida, Kenji Fukami, Naoyasu Hosoda, Miho Ishii, Toshiro Itoga, Eito Iwai, Tamotsu Magome, Masaya Oishi, Takashi Ohshima, Chikara Kondo, Tatsuyuki Sakurai, Masazumi Shoji, Takashi Sugimoto, Shiro Takano, Kazuhiro Tamura, Takahiro Watanabe, Takato Tomai, Noriyoshi Azumi, Takahiro Inagaki, Hirokazu Maesaka, Sunao Takahashi, Takashi Tanaka, Shinobu Inoue, Hirosuke Kumazawa, Kazuki Moriya, Kohei Sakai, Toshio Seno, Hiroshi Sumitomo, Ryoichi Takesako, Shinichiro Tanaka, Ryo Yamamoto, Kazutoshi Yokomachi, Masamichi Yoshioka, Toru Hara, Sakuo Matsui, Toshihiko Hiraiwa, Hitoshi Tanaka, Hiroyasu Ego

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Abstract

NanoTerasu, a new 3 GeV synchrotron light source in Japan, began user operation in April 2024. It provides high-brilliance soft to tender X-rays and covers a wide spectral range from ultraviolet to tender X-rays. Its compact storage ring with a circumference of 349 m is based on a four-bend achromat lattice to provide two straight sections in each cell for insertion devices with a natural horizontal emittance of 1.14 nm rad, which is small enough for soft X-rays users. The NanoTerasu accelerator incorporates several innovative technologies, including a full-energy injector C-band linear accelerator with a length of 110 m, an in-vacuum off-axis injection system, a four-bend achromat with B-Q combined bending magnets, and a TM020 mode accelerating cavity with built-in higher-order-mode dampers in the storage ring. This paper presents the accelerator machine commissioning over a half-year period and our model-consistent ring optics correction. The first user operation with a stored beam current of 160 mA is also reported. We summarize the storage ring parameters obtained from the commissioning. This is helpful for estimating the effective optical properties of synchrotron radiation at NanoTerasu.

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调试紧凑型多弯消色差晶格：新的 3 GeV 同步辐射设施

日本新的 3 GeV 同步辐射光源 NanoTerasu 于 2024 年 4 月开始运行。它提供高亮度的软X射线到嫩X射线，覆盖从紫外线到嫩X射线的宽光谱范围。其周长为 349 米的紧凑型存储环以四弯曲消色差晶格为基础，在每个单元中为插入装置提供两个直线部分，其自然水平发射率为 1.14 nm rad，对于软 X 射线用户来说已经足够小了。NanoTerasu 加速器采用了多项创新技术，包括长度为 110 米的全能量注入 C 波段直线加速器、真空离轴注入系统、带有 B-Q 组合弯曲磁铁的四弯消色差装置，以及在存储环中内置高阶模式阻尼器的 TM020 模式加速腔。本文介绍了历时半年的加速器机器调试情况，以及我们根据模型进行的环形光学校正。此外，还报告了存储束流为 160 mA 的首次用户运行情况。我们总结了调试过程中获得的储能环参数。这有助于估算同步辐射在 NanoTerasu 的有效光学特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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arXiv - PHYS - Accelerator Physics

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