TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T
The behavior of neutral deuterium (D) atoms is important for understanding the physics in the divertor region of nuclear fusion reactors. It is necessary to introduce an active measurement when considering the application to detached plasmas, where recombination processes dominate the processes dete...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000389 |
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| author | Shin Kajita Kota Hiraiwa Hirohiko Tanaka Ryuki Iwai Mitsutoshi Aramaki Ryo Yasuhara Noriyasu Ohno |
| author_facet | Shin Kajita Kota Hiraiwa Hirohiko Tanaka Ryuki Iwai Mitsutoshi Aramaki Ryo Yasuhara Noriyasu Ohno |
| author_sort | Shin Kajita |
| collection | DOAJ |
| description | The behavior of neutral deuterium (D) atoms is important for understanding the physics in the divertor region of nuclear fusion reactors. It is necessary to introduce an active measurement when considering the application to detached plasmas, where recombination processes dominate the processes determining the population distribution. In this work, we have developed a two-photon absorption laser-induced fluorescence (TALIF) system in the toroidal divertor simulator NAGDIS-T to measure D atomic density. The absolute D atomic density was obtained by calibrating the signal with the krypton TALIF signal. The gas pressure and power dependence of the D atomic density is shown. The D atomic density was in the range of 1.6 × 1018–1.4 × 1019 m−3, and the temperature was estimated to be <0.4 eV. The behavior of the D atoms is discussed in terms of the production process. |
| format | Article |
| id | doaj-art-e93d8a5e358d4c529536012ec58b3905 |
| institution | DOAJ |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-e93d8a5e358d4c529536012ec58b39052025-08-20T02:47:37ZengElsevierNuclear Materials and Energy2352-17912025-03-014210189810.1016/j.nme.2025.101898TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-TShin Kajita0Kota Hiraiwa1Hirohiko Tanaka2Ryuki Iwai3Mitsutoshi Aramaki4Ryo Yasuhara5Noriyasu Ohno6Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan; Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan; Corresponding author at: Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.Graduate School of Engineering, Nagoya University, Nagoya 464-8603, JapanInstitute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, JapanGraduate School of Engineering, Nagoya University, Nagoya 464-8603, JapanCollege of Industrial Technology, Nihon University, Chiba 275-8575, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, JapanGraduate School of Engineering, Nagoya University, Nagoya 464-8603, JapanThe behavior of neutral deuterium (D) atoms is important for understanding the physics in the divertor region of nuclear fusion reactors. It is necessary to introduce an active measurement when considering the application to detached plasmas, where recombination processes dominate the processes determining the population distribution. In this work, we have developed a two-photon absorption laser-induced fluorescence (TALIF) system in the toroidal divertor simulator NAGDIS-T to measure D atomic density. The absolute D atomic density was obtained by calibrating the signal with the krypton TALIF signal. The gas pressure and power dependence of the D atomic density is shown. The D atomic density was in the range of 1.6 × 1018–1.4 × 1019 m−3, and the temperature was estimated to be <0.4 eV. The behavior of the D atoms is discussed in terms of the production process.http://www.sciencedirect.com/science/article/pii/S2352179125000389TALIFD atomLaser induced fluorescenceNAGDIS-T |
| spellingShingle | Shin Kajita Kota Hiraiwa Hirohiko Tanaka Ryuki Iwai Mitsutoshi Aramaki Ryo Yasuhara Noriyasu Ohno TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T Nuclear Materials and Energy TALIF D atom Laser induced fluorescence NAGDIS-T |
| title | TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T |
| title_full | TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T |
| title_fullStr | TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T |
| title_full_unstemmed | TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T |
| title_short | TALIF measurements of atomic deuterium in toroidal divertor simulator NAGDIS-T |
| title_sort | talif measurements of atomic deuterium in toroidal divertor simulator nagdis t |
| topic | TALIF D atom Laser induced fluorescence NAGDIS-T |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000389 |
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