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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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1. IntroductionThe mechanism of the plasma impurity transportand L-H,mode transition is presently regarded asone of the most urgent problems under investigation.The L-H mode transition is related with the plasmapoloidal rotation and the distribution of the internalradial electric field [l].The plasma toroidal rotationcaused by neutral beam injection has already beenobserx'ed and studied in the PLT TOkamak [2], andthe results of the D Ill -D show that during L-H modetransition the change … 相似文献
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A 1 m vacuum ultraviolet (VUV) spectrometer with temporal and spatial resolution was developed for impurity study of HL-2A tokamak. The instrument is equipped with two concave gratings blazed at 80 nm and 150 nm, respectively, and a windowless back-illuminated charge coupled device (CCD) detector of 256 × 1024 pixels. Tile total wavelength coverage of spectrometer is 30~ 320 nm with a spectral resolution of 0.015 nm at a width of entrance slit of 10 μm. A portion of this range is observed during a plasma discharge with a spectral range of 20 nm. The minimum integration time of the detector system is about 6.7 ms for each frame in a full binning mode. Using a space-resolved slit located between the entrance slit and the grating a radial profile on the vertical direction with a range of 400 mm can be obtained. The primary results were successfully obtained with high signal-to-noise ratio and good spectral resolution, which demonstrated the instrument functions very well. 相似文献
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HL-1M装置在欧姆加热条件下进行过在一次放电中注入1~4粒小弹丸加料研究。今年,在一次放电中实现了8粒氢弹丸的连续注入,并对密度分布和扰动特征以及这些特征与装置器壁再循环、弹丸大小、注入速度和间隙的关系进行了进一步的研究。实验表明器壁再循环对高密度的获得有重要的影响。在再循环很小时,发射间隙适当的条件下,HL-1M能接受8发弹丸连续注入。而再循环较高的条件下连续注入3粒φ1.0mm弹丸获得了本轮加料实验的最好参数:等离子体中心密度n_e(0)=5.3×10~(13)cm~(-3),总体储能W_p=6.0 kJ,τ_e=26ms。用CCD相机拍摄了弹丸消融云的照片,对消融过程进行了简要的分析,证实消融的不对称和弹丸轨迹的偏转是电子侧消融强于离子侧的结果,弹丸发射间隙及完整性对密度扰动有重要的影响。 相似文献
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采用ZnS(Ag)闪烁计数器,经标准中子源刻度校正后,测量HL-1(中国环流器一号)聚变装置的中子演化和中子产额;同时用活化箔法(115In)和原子核乳胶法测量中子产额。在真空室充氘和电子回旋共振加热(ECRH)时,3种方法同时测量,确证HL-1每放电1次发射中子数平均为(3.41±0.50)×1010。得到欧姆加热、ECRH、改进约束放电(IOC)和弹丸注入等放电实验中的中子演化。在分子束注入和偏压电极(EPP)放电实验中,产生中子较少或很少。观察部分放电方式产生的中子产额N和硬X射线产额HX间有线性关系N=aHX-b,其中,a和b是与装置运行方式有关的常数。 相似文献