Development of impurity seeding and radiation enhancement in the helical divertor of LHD
作者: K. MukaiS. MasuzakiB.J. PetersonT. AkiyamaM. KobayashiC. SuzukiH. TanakaS.N. PandyaR. SanoG. MotojimaN. OhnoT. MorisakiI. MurakamiJ. MiyazawaN. TamuraS. YoshimuraI. YamadaR. YasuharaH. FunabaK. Tanaka
作者单位: 1National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
2SOKENDAI (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0163, Japan
3Institute for Plasma Research, Bhat, Gandhinagar 382 428, India
4Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
刊名: Nuclear Fusion, 2015, Vol.55 (8)
来源数据库: Institute of Physics Journal
DOI: 10.1088/0029-5515/55/8/083016
原始语种摘要: Impurity seeding to reduce the divertor heat load was conducted in the large helical device (LHD) using neon (Ne) and krypton (Kr) puffing. Radiation enhancement and reduction of the divertor heat load were observed. In the LHD, the ratio between the total radiated power and the heating power, f rad = P rad/ P heating, is limited up to around 30% in hydrogen plasmas even for high density plasma just below the radiative collapse ( n e, bar > 1 × 1020 m−3), where n e, bar is the line averaged density. With Ne seeding, the ratio could be raised to 52% at n e, bar ~ 1.3 × 1019 m−3, albeit with a slight reduction in confinement. f rad ~ 30% could be sustained for 3.4 s using...
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关键词翻译
关键词翻译
  • seeding 幼苗
  • divertor 分流偏滤器
  • radiation 辐射
  • enhancement 增强
  • conducted 有陪同的
  • helical 螺旋状的
  • density 密度
  • reduction 减少
  • observed 观察到的
  • heating 加热