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首页> 外文期刊>Plasma and Fusion Research >Observation of Electron-Temperature Fluctuations Triggered by Supersonic Gas Puffing in the LHD
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Observation of Electron-Temperature Fluctuations Triggered by Supersonic Gas Puffing in the LHD

机译：左翼飞行器中超音速气体吹气引起的电子温度波动的观察

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摘要

Non-local transport and electron temperature fluctuations triggered by supersonic gas puffing (SSGP) in high-temperature helical plasmas in the Large Helical Device (LHD) are reported. After a short-pulse SSGP, the core electron temperature increased while the edge electron temperature decreased. SSGP triggered a longer core temperature increase than that triggered by a small impurity pellet injection. The temperature profile, which was relatively flat inside the half minor radius before SSGP, became parabolic after non-local transport was triggered. Fluctuations were excited in the electron temperature signals around the half minor radius. The frequency of these fluctuations increased from ～ 400 Hz to ～ 1 kHz within ～ 0.1 s and the amplitude decreased correspondingly. The temperature fluctuations inside and outside of the half minor radius had opposite phases. Magnetic fluctuations resonating near the half minor radius were observed simultaneously with the electron temperature fluctuations.
机译：据报道，大型螺旋装置（LHD）的高温螺旋等离子体中的超音速气体吹气（SSGP）引发了非局部传输和电子温度波动。经过短脉冲SSGP后，核心电子温度升高，而边缘电子温度降低。 SSGP引发的核心温度升高时间要长于少量杂质颗粒注入所引发的温度升高。温度曲线在SSGP之前的半小半径内相对平坦，在触发了非局部传输后变成了抛物线形。电子温度信号在半短半径附近激发起伏。这些波动的频率在〜0.1 s内从〜400 Hz增加到〜1 kHz，幅度相应减小。半副半径内外的温度波动具有相反的相位。在电子半径波动的同时观察到在半半径附近共振的磁波动。

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