Extension of high-beta plasma operation to low-collisionality regime
作者: S. SakakibaraK.Y. WatanabeH. FunabaY. SuzukiS. OhdachiK. IdaK. TanakaT. TokuzawaT. MorisakiM. OsakabeY. TakeiriLHD Experiment Group
作者单位: 1National Institute for Fusion Science (NIFS), National Institutes for Natural Sciences (NINS), Toki 509-5292, Japan
2SOKENDAI (The Graduate University for Advanced Studies), Toki 509-5292, Japan
刊名: Nuclear Fusion, 2017, Vol.57 (6)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa65aa
原始语种摘要: In the large helical device, plasma with more than 4% average beta was successfully produced by multi-pellet injections in a regime with a collisionality one order of magnitude lower than that in previous high-beta operations. An improvement in particle confinement was observed during a high-beta discharge produced by a gas puff, and particle flux to the divertor was reduced by more than 40%. High instabilities at the plasma edge occurred and suppressed the increment of the average beta to 3.4%. A spontaneous change in the magnetic topology contributes to an increase in the average beta value while triggering the excitation of edge MHD instabilities.
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  • regime 状况
  • average 平均
  • observed 观察到的
  • plasma 深绿玉髓
  • lower 降下
  • particle 颗粒
  • divertor 分流偏滤器
  • produced 出品
  • improvement 改良
  • more 更多