Setting the H-mode pedestal structure: variations of particle source location using gas puff and pellet fueling
作者: A.O. NelsonF.M. LaggnerR. GroebnerB.A. GriersonO. IzacardD. EldonM.W. ShaferA. LeonardD. ShirakiA.C. SontagE. Kolementhe DIII-D Team
刊名: Nuclear Fusion, 2020, Vol.60 (4)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/ab5e65
原始语种摘要: Experiments in DIII-D show that a particle source location inside the top of the H-mode pedestal (pellets maintains a higher pedestal pressure than an edge source (gas fueling through a widening of the electron temperature pedestal with reduction of the temperature gradient. The effect of these two fueling schemes on the H-mode pedestal structure was examined in DIII-D by comparing controlled pellet-fueled and gas-fueled discharges across a fueling scan up to 40 torr l s−1. High resolution electron profiles reveal that gas fueling lowers the pedestal pressure as the density profile shifts radially outwards and the separatrix density increases, while pellet fueling maintains a constant pedestal pressure. The neutral source locations from pellets and gas are determined with the PELLET and...
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关键词翻译
关键词翻译
  • pedestal 基座
  • location 定位
  • fueling 供给燃料
  • source 
  • particle 颗粒
  • structure 构造
  • significant 有效的
  • quantify 量化
  • density 密度
  • constant 常数