Deuterium recycling and wall retention characteristics during boron powder injection in EAST
Boron (B), as a low-Z material, is widely employed for wall conditioning to enhance plasma performance in fusion devices. In the Experimental Advanced Superconducting Tokamak, a series of experiments involving real-time B powder injection has been conducted to investigate fuel particle behavior. It...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ad1355 |
| _version_ | 1797390176385761280 |
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| author | G Z Zuo Z Wang Z Sun W Xu Z T Zhou Y H Guan M Huang R Maingi J S Hu |
| author_facet | G Z Zuo Z Wang Z Sun W Xu Z T Zhou Y H Guan M Huang R Maingi J S Hu |
| author_sort | G Z Zuo |
| collection | DOAJ |
| description | Boron (B), as a low-Z material, is widely employed for wall conditioning to enhance plasma performance in fusion devices. In the Experimental Advanced Superconducting Tokamak, a series of experiments involving real-time B powder injection has been conducted to investigate fuel particle behavior. It was observed that fuel particle recycling decreased with an increase in the amount of B powder injected, resulting in an increase in short-term fuel retention. The fuel recycling decreased by up to 80%, as indicated by divertor neutral pressure and D α line emission. Furthermore, each B atom exhibited a trapping capacity of 0.3 D particles during B powder injection at a typical flow rate. The real-time B injection had no wall hysteresis effect on D retention, implying that cumulative B injection and deposited film did not affect long-term D retention. The possible mechanism for D retention is the formation of B-C-O-D compounds and co-deposition between B and D particles during discharges. This investigation would be valuable for evaluating T retention when B is used as wall conditioning material in future fusion reactor devices. |
| first_indexed | 2024-03-08T23:07:57Z |
| format | Article |
| id | doaj.art-e33ff2c7ba714d9291aa41e6db518235 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-08T23:07:57Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-e33ff2c7ba714d9291aa41e6db5182352023-12-15T10:44:16ZengIOP PublishingMaterials Research Express2053-15912023-01-01101212640210.1088/2053-1591/ad1355Deuterium recycling and wall retention characteristics during boron powder injection in EASTG Z Zuo0https://orcid.org/0000-0002-4149-089XZ Wang1Z Sun2https://orcid.org/0000-0002-7224-3592W Xu3https://orcid.org/0000-0001-8619-6953Z T Zhou4Y H Guan5M Huang6R Maingi7https://orcid.org/0000-0003-1238-8121J S Hu8Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of China; Anhui University , Hefei, Anhui 230601, People’s Republic of ChinaPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of AmericaInstitute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230026, People’s Republic of ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of China; Anhui University , Hefei, Anhui 230601, People’s Republic of ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of China; Anhui University , Hefei, Anhui 230601, People’s Republic of ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of ChinaPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of AmericaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People’s Republic of China; CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei 230031, People’s Republic of ChinaBoron (B), as a low-Z material, is widely employed for wall conditioning to enhance plasma performance in fusion devices. In the Experimental Advanced Superconducting Tokamak, a series of experiments involving real-time B powder injection has been conducted to investigate fuel particle behavior. It was observed that fuel particle recycling decreased with an increase in the amount of B powder injected, resulting in an increase in short-term fuel retention. The fuel recycling decreased by up to 80%, as indicated by divertor neutral pressure and D α line emission. Furthermore, each B atom exhibited a trapping capacity of 0.3 D particles during B powder injection at a typical flow rate. The real-time B injection had no wall hysteresis effect on D retention, implying that cumulative B injection and deposited film did not affect long-term D retention. The possible mechanism for D retention is the formation of B-C-O-D compounds and co-deposition between B and D particles during discharges. This investigation would be valuable for evaluating T retention when B is used as wall conditioning material in future fusion reactor devices.https://doi.org/10.1088/2053-1591/ad1355boronrecyclingwall conditioningfirst walleast |
| spellingShingle | G Z Zuo Z Wang Z Sun W Xu Z T Zhou Y H Guan M Huang R Maingi J S Hu Deuterium recycling and wall retention characteristics during boron powder injection in EAST Materials Research Express boron recycling wall conditioning first wall east |
| title | Deuterium recycling and wall retention characteristics during boron powder injection in EAST |
| title_full | Deuterium recycling and wall retention characteristics during boron powder injection in EAST |
| title_fullStr | Deuterium recycling and wall retention characteristics during boron powder injection in EAST |
| title_full_unstemmed | Deuterium recycling and wall retention characteristics during boron powder injection in EAST |
| title_short | Deuterium recycling and wall retention characteristics during boron powder injection in EAST |
| title_sort | deuterium recycling and wall retention characteristics during boron powder injection in east |
| topic | boron recycling wall conditioning first wall east |
| url | https://doi.org/10.1088/2053-1591/ad1355 |
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