Overview of EXL-50 Research Progress and Future Plan
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866914208612876288 |
|---|---|
| author | Shi, Yuejiang Wang, Yumin Liu, Bing Song, Xianming Song, Shaodong Jiang, Xinchen Guo, Dong Luo, Di Gu, Xiang Sun, Tiantian Huang, Xianli Li, Zhi Dong, Lili Wang, Xueyun Yin, Gang Wang, Mingyuan Liu, Wenjun Zhao, Hanyue Xie, Huasheng Yong Liu Qi, Dongkai Xing, Bo Ding, Jiangbo Wu, Chao Li, Lei Zhang, Haijun Yang, Yuanming Zhao, Xin Yang, Enwu Luo, Wenwu Zhou, Peihai Han, Lei Zhou, Qing Wang, Hanqing Dong, Jiaqi Yuan, Baoshan Peng, Y. -K. Martin. Liu, Minsheng Team, the EXL-50 |
| author_facet | Shi, Yuejiang Wang, Yumin Liu, Bing Song, Xianming Song, Shaodong Jiang, Xinchen Guo, Dong Luo, Di Gu, Xiang Sun, Tiantian Huang, Xianli Li, Zhi Dong, Lili Wang, Xueyun Yin, Gang Wang, Mingyuan Liu, Wenjun Zhao, Hanyue Xie, Huasheng Yong Liu Qi, Dongkai Xing, Bo Ding, Jiangbo Wu, Chao Li, Lei Zhang, Haijun Yang, Yuanming Zhao, Xin Yang, Enwu Luo, Wenwu Zhou, Peihai Han, Lei Zhou, Qing Wang, Hanqing Dong, Jiaqi Yuan, Baoshan Peng, Y. -K. Martin. Liu, Minsheng Team, the EXL-50 |
| contents | XuanLong-50 (EXL-50) is the first medium-size spherical torus (ST) in China, with the toroidal field at major radius at 50 cm around 0.5T. CS-free and non-inductive current drive via electron cyclotron resonance heating (ECRH) was the main physics research issue for EXL-50. Discharges with plasma currents of 50 kA - 180 kA were routinely obtained in EXL-50, with the current flattop sustained for up to or beyond 2 s. The current drive effectiveness on EXL-50 was as high as 1 A/W for low-density discharges using 28GHz ECRH alone for heating power less than 200 kW. The plasma current reached Ip>80 kA for high-density (5*10e18m-2) discharges with 150 kW 28GHz ECRH. Higher performance discharge (Ip of about 120 kA and core density of about 1*10e19m-3) was achieved with 150 kW 50GHz ECRH. The plasma current in EXL-50 was mainly carried by the energetic electrons.Multi-fluid equilibrium model has been successfully applied to reconstruct the magnetic flux surface and the measured plasma parameters of the EXL-50 equilibrium. The physics mechanisms for the solenoid-free ECRH current drive and the energetic electrons has also been investigated. Preliminary experimental results show that 100 kW of lower hybrid current drive (LHCD) waves can drive 20 kA of plasma current. Several boron injection systems were installed and tested in EXL-50, including B2H6 gas puffing, boron powder injection, boron pellet injection. The research plan of EXL-50U, which is the upgrade machine of EXL-50, is also presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04745 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Overview of EXL-50 Research Progress and Future Plan Shi, Yuejiang Wang, Yumin Liu, Bing Song, Xianming Song, Shaodong Jiang, Xinchen Guo, Dong Luo, Di Gu, Xiang Sun, Tiantian Huang, Xianli Li, Zhi Dong, Lili Wang, Xueyun Yin, Gang Wang, Mingyuan Liu, Wenjun Zhao, Hanyue Xie, Huasheng Yong Liu Qi, Dongkai Xing, Bo Ding, Jiangbo Wu, Chao Li, Lei Zhang, Haijun Yang, Yuanming Zhao, Xin Yang, Enwu Luo, Wenwu Zhou, Peihai Han, Lei Zhou, Qing Wang, Hanqing Dong, Jiaqi Yuan, Baoshan Peng, Y. -K. Martin. Liu, Minsheng Team, the EXL-50 Plasma Physics XuanLong-50 (EXL-50) is the first medium-size spherical torus (ST) in China, with the toroidal field at major radius at 50 cm around 0.5T. CS-free and non-inductive current drive via electron cyclotron resonance heating (ECRH) was the main physics research issue for EXL-50. Discharges with plasma currents of 50 kA - 180 kA were routinely obtained in EXL-50, with the current flattop sustained for up to or beyond 2 s. The current drive effectiveness on EXL-50 was as high as 1 A/W for low-density discharges using 28GHz ECRH alone for heating power less than 200 kW. The plasma current reached Ip>80 kA for high-density (5*10e18m-2) discharges with 150 kW 28GHz ECRH. Higher performance discharge (Ip of about 120 kA and core density of about 1*10e19m-3) was achieved with 150 kW 50GHz ECRH. The plasma current in EXL-50 was mainly carried by the energetic electrons.Multi-fluid equilibrium model has been successfully applied to reconstruct the magnetic flux surface and the measured plasma parameters of the EXL-50 equilibrium. The physics mechanisms for the solenoid-free ECRH current drive and the energetic electrons has also been investigated. Preliminary experimental results show that 100 kW of lower hybrid current drive (LHCD) waves can drive 20 kA of plasma current. Several boron injection systems were installed and tested in EXL-50, including B2H6 gas puffing, boron powder injection, boron pellet injection. The research plan of EXL-50U, which is the upgrade machine of EXL-50, is also presented. |
| title | Overview of EXL-50 Research Progress and Future Plan |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2502.04745 |