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PreprintCC BY 4.0arXiv

First achievement of 100 million degree electron temperatures in a spherical torus: the EXL-50U

  • Guang Yang
  • Shaodong Song
  • Songjian Li
  • Xiaobing Xie
  • Zhaokun Wang
  • Xiang Gu
  • Jia Li
  • Xianli Huang
  • Xinchen Jiang
  • Yupeng Guan
  • Huicong Ma
  • Junquan Lin
5 more authors
  • Dong Guo
  • Jiaqi Dong
  • Yunfeng Liang
  • Yuejiang Shi
  • the EXL-50U Team
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Abstract

Here,we report an ST plasma in which Thomson scattering measures a central electron temperature exceeding 8.6 keV (100 million degrees kelvin) on the EXL-50U spherical torus device.The high-temperature phase is obtained at low density by sequential operation of two 50 GHz ECRH systems: ordinary-mode (O-mode) ECRH3 followed by extraordinary-mode (X-mode) ECRH4. In contrast to neutral-beam-heated high-ion-temperature ST scenarios, the discharge is sustained by ECRH only.

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Cite

BibTeXRIS
BibTeX
@misc{yang2026first,
  title = {{First achievement of 100 million degree electron temperatures in a spherical torus: the EXL-50U}},
  author = {Guang Yang and Shaodong Song and Songjian Li and Xiaobing Xie and Zhaokun Wang and Xiang Gu and Jia Li and Xianli Huang and Xinchen Jiang and Yupeng Guan and Huicong Ma and Junquan Lin and Dong Guo and Jiaqi Dong and Yunfeng Liang and Yuejiang Shi and the EXL-50U Team},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.14684},
  eprint = {2610.14684},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.14684},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - First achievement of 100 million degree electron temperatures in a spherical torus: the EXL-50U
AU  - Guang Yang
AU  - Shaodong Song
AU  - Songjian Li
AU  - Xiaobing Xie
AU  - Zhaokun Wang
AU  - Xiang Gu
AU  - Jia Li
AU  - Xianli Huang
AU  - Xinchen Jiang
AU  - Yupeng Guan
AU  - Huicong Ma
AU  - Junquan Lin
AU  - Dong Guo
AU  - Jiaqi Dong
AU  - Yunfeng Liang
AU  - Yuejiang Shi
AU  - the EXL-50U Team
PY  - 2026
DA  - 2026/10/10
PB  - arXiv
DO  - 10.48550/arxiv.2610.14684
UR  - https://arxiv.org/abs/2610.14684
AB  - Here,we report an ST plasma in which Thomson scattering measures a central electron temperature exceeding 8.6 keV (100 million degrees kelvin) on the EXL-50U spherical torus device.The high-temperature phase is obtained at low density by sequential operation of two 50 GHz ECRH systems: ordinary-mode (O-mode) ECRH3 followed by extraordinary-mode (X-mode) ECRH4. In contrast to neutral-beam-heated high-ion-temperature ST scenarios, the discharge is sustained by ECRH only.
ER  -