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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.19579 |
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| _version_ | 1866914283689869312 |
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| author | Muramatsu, Norihito Miyabe, Manabu Okabe, Masahiro Date, Schin Harada, Tetsuo Kanda, Kazuhiro Miyamoto, Shuji Ohkuma, Haruo Shimizu, Hajime Suzuki, Shinsuke Tokiyasu, Atsushi |
| author_facet | Muramatsu, Norihito Miyabe, Manabu Okabe, Masahiro Date, Schin Harada, Tetsuo Kanda, Kazuhiro Miyamoto, Shuji Ohkuma, Haruo Shimizu, Hajime Suzuki, Shinsuke Tokiyasu, Atsushi |
| contents | Compton scattering of photons off high-energy electrons is a fundamental quantum mechanical process widely utilized to produce a $γ$-ray beam for scientific research. Instead of injecting laser light into a storage ring as a conventional way, we have developed an innovative method to achieve drastically higher energies approaching the ring energy by the backward Compton scattering of extreme ultraviolet light. In this method, $92$ $\mathrm{eV}$ photons obtained from an undulator in a storage ring were reflected back to the original ring using a Mo/Si multilayer mirror. Consequently, $γ$-ray beam production through the extreme ultraviolet light Compton scattering was observed for the first time in a demonstration experiment at the $1$ $\mathrm{GeV}$ ring, NewSUBARU. The measured energy spectrum was well reproduced by a theoretical calculation with the maximum energy of $0.543$ $\mathrm{GeV}$. The production rate was $1.4 \pm 0.1$ kcps for the energies above $0.160$ $\mathrm{GeV}$. This rate was quantitatively explained by the luminosity and the scattering cross section. The present work paved the way to create a new $γ$-ray beam source for future applications such as hadron photoproduction experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19579 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | First observation of the $γ$-ray beam production by the backward Compton scattering of extreme ultraviolet light emitted from an undulator Muramatsu, Norihito Miyabe, Manabu Okabe, Masahiro Date, Schin Harada, Tetsuo Kanda, Kazuhiro Miyamoto, Shuji Ohkuma, Haruo Shimizu, Hajime Suzuki, Shinsuke Tokiyasu, Atsushi Accelerator Physics Nuclear Experiment Instrumentation and Detectors Compton scattering of photons off high-energy electrons is a fundamental quantum mechanical process widely utilized to produce a $γ$-ray beam for scientific research. Instead of injecting laser light into a storage ring as a conventional way, we have developed an innovative method to achieve drastically higher energies approaching the ring energy by the backward Compton scattering of extreme ultraviolet light. In this method, $92$ $\mathrm{eV}$ photons obtained from an undulator in a storage ring were reflected back to the original ring using a Mo/Si multilayer mirror. Consequently, $γ$-ray beam production through the extreme ultraviolet light Compton scattering was observed for the first time in a demonstration experiment at the $1$ $\mathrm{GeV}$ ring, NewSUBARU. The measured energy spectrum was well reproduced by a theoretical calculation with the maximum energy of $0.543$ $\mathrm{GeV}$. The production rate was $1.4 \pm 0.1$ kcps for the energies above $0.160$ $\mathrm{GeV}$. This rate was quantitatively explained by the luminosity and the scattering cross section. The present work paved the way to create a new $γ$-ray beam source for future applications such as hadron photoproduction experiments. |
| title | First observation of the $γ$-ray beam production by the backward Compton scattering of extreme ultraviolet light emitted from an undulator |
| topic | Accelerator Physics Nuclear Experiment Instrumentation and Detectors |
| url | https://arxiv.org/abs/2601.19579 |