Edge Plasma behavior during Improved Confinement by Lower Hybrid Wave Heating in HT-6M Tokamak

• 作 者: 李建刚rrrrrrrrrn 鲍抑rrrrrrrrrn 罗家融rrrrrrrrrn 万宝年rrrrrrrrrn 刘岳修rrrrrrrrrn 龚显祖rrrrrrrrrn 陈俊凌rrrrrrrrrn 梁云峰
• 出 处: Plasma Science & Technology
• 发表日期: 2002年05期
• 关键词: Lower in HT-6M Heating Hybrid Improved Confinement Plasma Tokamak Wave

Lower hybrid heating (LHH) has been successfully carried out in the HT-6M toka-mak. The H-mode has been obtained with a power threshold of 50 kW under a boronized wall condition. Both energy and particle confinements have been improved along with a dropped edge plasma density and an increase electron temperature during the LHH phase. A negative Er well plays a key role of triggering and sustaining the good confinement. Both electrostatic fluctuation of the plasma potential and the density fluctuations dropped to an ultra-low level. The observation of an enhanced Er shear before the reduction in turbulence level is consistent with an increased Er shear as the cause of turbulence suppression.

The H-mode has been obtained with a power threshold of 50 kW under a boronized wall condition. Both energy and particle confinements have been improved along with a dropped edge plasma density and an increase electron temperature during the LHH phase. A negative Erbium plays a key role of triggering and sustaining the good confinement. Both electrostatic fluctuation of the good confinement. The observation of an enhanced Er shear before the reduction in turbulence level is consistent with an increased Er shear as the cause of turbulence suppression.