Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas.

Autor: Wang L; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Wang HQ; General Atomics, San Diego, CA, USA. wanghuiqian@fusion.gat.com., Ding S; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.; Oak Ridge Associated Universities, Oak Ridge, TN, USA., Garofalo AM; General Atomics, San Diego, CA, USA., Gong XZ; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Eldon D; General Atomics, San Diego, CA, USA., Guo HY; General Atomics, San Diego, CA, USA., Leonard AW; General Atomics, San Diego, CA, USA., Hyatt AW; General Atomics, San Diego, CA, USA., Qian JP; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Weisberg DB; General Atomics, San Diego, CA, USA., McClenaghan J; General Atomics, San Diego, CA, USA., Fenstermacher ME; Lawrence Livermore National Laboratory, Livermore, CA, USA., Lasnier CJ; Lawrence Livermore National Laboratory, Livermore, CA, USA., Watkins JG; Sandia National Laboratories, Livermore, CA, USA., Shafer MW; Oak Ridge National Laboratory, Oak Ridge, TN, USA., Xu GS; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Huang J; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Ren QL; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Buttery RJ; General Atomics, San Diego, CA, USA., Humphreys DA; General Atomics, San Diego, CA, USA., Thomas DM; General Atomics, San Diego, CA, USA., Zhang B; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China., Liu JB; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Mar 01; Vol. 12 (1), pp. 1365. Date of Electronic Publication: 2021 Mar 01.
DOI: 10.1038/s41467-021-21645-y
Abstrakt: Divertor detachment offers a promising solution to the challenge of plasma-wall interactions for steady-state operation of fusion reactors. Here, we demonstrate the excellent compatibility of actively controlled full divertor detachment with a high-performance (β N ~ 3, H 98 ~ 1.5) core plasma, using high-β p (poloidal beta, β p  > 2) scenario characterized by a sustained core internal transport barrier (ITB) and a modest edge transport barrier (ETB) in DIII-D tokamak. The high-β p high-confinement scenario facilitates divertor detachment which, in turn, promotes the development of an even stronger ITB at large radius with a weaker ETB. This self-organized synergy between ITB and ETB, leads to a net gain in energy confinement, in contrast to the net confinement loss caused by divertor detachment in standard H-modes. These results show the potential of integrating excellent core plasma performance with an efficient divertor solution, an essential step towards steady-state operation of reactor-grade plasmas.
Databáze: MEDLINE
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