An application of a Si/CdTe Compton camera for the polarization measurement of hard x rays from highly charged heavy ions
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- Yutaka Tsuzuki
- Department of Physics, The University of Tokyo 1 , 7-3-1, Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Shin Watanabe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency 3 , 3-1-1 Yoshinodai, Chuo Sagamihara, Kanagawa 252-5210, Japan
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- Shimpei Oishi
- Institute for Laser Science, The University of Electro-Communications 4 , Chofu, Tokyo 182-8585, Japan
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- Nobuyuki Nakamura
- Institute for Laser Science, The University of Electro-Communications 4 , Chofu, Tokyo 182-8585, Japan
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- Naoki Numadate
- Komaba Institute for Science, The University of Tokyo 5 , 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
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- Hirokazu Odaka
- Department of Physics, The University of Tokyo 1 , 7-3-1, Hongo, Bunkyo, Tokyo 113-0033, Japan
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- Yuusuke Uchida
- Department of Physics, Hiroshima University 6 , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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- Hiroki Yoneda
- RIKEN Nishina Center 7 , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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- Tadayuki Takahashi
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), Institutes for Advanced Study (UTIAS), The University of Tokyo 2 , 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8583, Japan
書誌事項
- 公開日
- 2021-06-01
- 資源種別
- journal article
- DOI
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- 10.1063/5.0050826
- 10.48550/arxiv.2105.14236
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>Methods to measure the polarization of x rays from highly charged heavy ions with a significantly higher accuracy than that of the existing technology are needed to explore relativistic and quantum electrodynamics effects, including the Breit interaction. We developed an Electron Beam Ion Trap Compton Camera (EBIT-CC), a new Compton polarimeter with pixelated multi-layer silicon, and cadmium telluride counters. The EBIT-CC detects the three-dimensional position of Compton scattering and photoelectric absorption, and thus, the degree of polarization of incoming x rays can be evaluated. We attached the EBIT-CC on the Tokyo Electron Beam Ion Trap (Tokyo-EBIT) in the University of Electro-Communications. An experiment was performed to evaluate its polarimetric capability through an observation of radiative recombination x rays emitted from highly charged krypton ions, which were generated by the Tokyo-EBIT. The CC of the EBIT-CC was calibrated for the ∼75 keV x rays. We developed event reconstruction and selection procedures and applied them to every registered event. As a result, we successfully obtained the polarization degree with an absolute uncertainty of 0.02. This uncertainty is small enough to probe the difference between the zero-frequency approximation and full-frequency-dependent calculation for the Breit interaction, which is expected for dielectronic recombination x rays of highly charged heavy ions.</jats:p>
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 92 (6), 2021-06-01
AIP Publishing