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介于已有的喷气(Gas puffing)和弹丸注入(Ice pellet injection)之间,提出了一种新的托卡马克加料手段——脉冲超声分子束注入。在较高的粒子注入通量5×10~(19)/脉冲时,氢分子的速度仍可达到500m/s。一系列氦分子束脉冲注入初始密度为(?)=0.4×10~(19)m~(-3)HL-1M真空室氢等离子体,经过160ms,密度上升至(?)=5.4×10~(19)m~(-3)。根据脉冲分子束注入初期氦光谱(He I 587·6nm)强度的径向分布,1/3峰高位于γ=12cm附近。注入 相似文献
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利用HL-1装置的等离子体辐照研究了石墨基体上的TiC、SiC涂层和壁碳化。对辐照前后的样品进行俄歇电子能谱(AES)、扫描电镜(SEM),X射线光电子谱(XPS)和X射线衍射谱(XDS)分析。结果表明,TiC和SiC材料应用于孔栏和壁涂层以及壁碳化有利于减少金属重杂质和氧杂质水平,提高了等离子体品质。 相似文献
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1. IntroductionThe international Thermonuclear ExperimentalReactor (ITER) is a tokalnak device with the cooperation of international thermonuclear circle. TheITER Expert Group pointed out [1], that a majorphysics issue is whether or not the fuel introducedon the plasma boundary can penetrate the SOL toreach the region of the core plasma. Pulsed supersonic molecular beam injection (SMBI) has success'fully been developed in the HL-IM tokamak in ant 4attempt to enhance the penetrating d… 相似文献
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HUANG Xianli 《等离子体科学和技术》2013,15(3):221-224
Perturbative experiments on electron heat transport have been successfully con- ducted on the HL-2A tokamak. The pulse propagation of the electron temperature is induced by the supersonic molecular beam injection (SMBI), which has characteristics of good localization and deep deposition. A model based on the electron heat transport in cylindrical geometry has been applied to reconstruct the measured amplitude and phase profi les of the electron temperature perturbation. The results show that the heat transport is significantly reduced near the pedestal region of the H-mode plasma. In the \profi ness/resilience" region, similar heat diffusivities have been observed in L-mode and H-mode plasmas, which verifiesthe gradient-driven transport physics in tokamaks. 相似文献