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为了获取HL-2A等离子体的离子温度、旋转速度及其分布等重要参数,首次在HL-2A装置上开展了CXRS诊断。通过利用能有效探测微弱光的EMCCD和特殊设计的光学采集系统,获得了具有足够信噪比的诊断信号。实验得到的测量信号分析表明,设计是切实可行的。     

HL-2A托卡马克中性束辐射光谱的数值模拟

采用数值模拟的方法研究中性束辐射光谱(BES)对开展与中性束相关的光谱诊断与实验有重要的指导意义.本文在HL-2A托卡马克装置上利用ADAS数据库（Atomic Data and Analysis Structure,1998）计算有效束辐射系数和有效束衰减系数,分析了束辐射光谱强度与等离子体运行参数和中性束参数的关系,并在不同的中性束注入能量、等离子体密度分布和等离子体温度分布的情况下,获得了束辐射光谱强度的空间分布.在n_e=2×10¹³ cm< 关键词： 中性束 束辐射光谱 束衰减     

γ-取代-β-二酮二羧基合铑的合成与介晶性

合成了体系中含一个苯环、二个苯环的γ-取代-β二酮二羰基合铑棒状金属有机化合物,并对其介晶性进行了表征.探讨了分子长宽比、刚性实和结构对液晶性质的影响.同时表明了向列相有机液晶分子的模型设计同样能很好地指导金属有机液晶分子的设计、合成及介晶性行为的研究.     

衍射相位显微技术的开发及其对贾第鞭毛虫的定量研究

基于离轴干涉原理和共光路结构布局,设计和搭建了以激光作为光源的衍射相位显微成像系统,在未放样品的情况下,测得该系统的平均噪声误差仅有6.70 nm.利用标称直径为4.8μm的标准聚苯乙烯微球来检验该系统检测的准确性,测量误差与理论预期结果相比不超过4%.用该系统测量100只贾第鞭毛虫包囊个体,并重建贾第鞭毛虫包囊的相位图,在相位图的基础上,估算出每个贾第鞭毛虫包囊的干质量.对测量结果进行统计分析,结果表明贾第鞭毛虫包囊呈椭圆形状,长轴范围为8~15μm,短轴范围为4~7μm,包囊的干质量在42.70~137.07 pg之间.该衍射相位显微成像系统采集速度快、准确性高,可以满足对单个寄生虫形态和干质量进行定量分析的需求.     

First Charge Exchange Recombination Spectroscopy Diagnostic in HL-2A Tokamak

Spatially resolved measurements of ion temperature are crucial for understanding plasma dynamics. A charge exchange recombination spectroscopy diagnostic system based on a heating neutral beam is installed on the HL- 2A tokamak. An optical collection system is designed in accordance with the actual geometry of HL-2A and the CVI 529.2nm （n = 8 → 7） charge-exchange recombination line. Preliminary measurements show that the CX signals have enough signal-to-noise ratio （SNR）. The ion temperature and its profiles are obtained through this svstem for the first time.     

γ-取代-β-二酮二羰基合铑的合成与介晶性

合成了体系中含一个苯环、二个苯环的γ-取代-β二酮二羰基合铑棒状金属有机化合物, 并对其介晶性进行了表征。探讨了分子长宽比、刚性实和结构对液晶性质的影响。同时表明了向列相有机液晶分子的模型设计同样能很好地指导金属有机液晶分子的设计、合成及介晶性行为的研究。     

咪唑类NO自旋探针的量子化学研究

用量子化学方法AM1(Austin Model 1)研究了一系列有一氧化氮活性的咪唑类氮氧自由基及其反应中间体的几何结构、电子结构、电子自旋密度分布及其相对能量的关系.对这类氮氧自由基的取代基效应和捕捉NO的反应历程进行了理论探讨.     

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在HL-2A中性束试验平台上,利用多普勒频移光谱方法测量了离子源引出离子流的各组成成分及其随弧流的变化情况。在数据分析中提出了遗传算法(GA)和L-M优化算法相结合进行光谱拟合的方法。结果表明,当束能量为30keV、弧流为340A时,离子流中各组分之比 JH+:JH2+:JH3+=0.57: 0.36: 0.07。当弧流从90A增加到350A时,H+百分比从45%增加到57%,而H3+则从17%降到7%。     

High-Power Ion Beam Characteristics of a Magnetic Multi-Pole Line-Cusp Ion Source for the HL-2A Tokomak

A circular magnetic multi-pole line-cusp ion source with a nominal 45 keV 25 A hydrogen ion beam is developed for the neutraJ beam injector of the HL-2A tokomak. At present, this bucket ion source can produce a 40 keV 20 A hydrogen ion beam for less than lOOms on a test bed, and a 35 ke V 13A ion beam for 300ms on the injector of the HL-2A tokomak. The 1/e half-width of the ion beam power profile is about 6.0 ± 0.2 em at the positionof 3.26m downstream from ion source, and the corresponding divergence degree is nearly 1.1. The optimum perveance matched conditions were obtained experimentally, and were in good agreement with the values from experiential equation of Uhlemann et al. The maximum of optimum perveance reached 2.2 × 10^-6 A/V^1.5 for 38 keV beam energy. An ion beam with above 60% H^＋ species fraction can be achieved, which was measured by Ha light Doppler shift spectroscopy. According to research results, a neutral beam with a total power of more than 0.6 MW was successfully injected into the plasma of the HL-2A Tokomak in 2008.     

Proton Ratio of HL-2A Bucket Ion Source

For heating the tokamak plasma effectively, the ion source must be capable of producing ions with high proton ratio. The proton ratio, which is found to be more than 65.6% at the ion current of 19.6A with the extraction voltage of 39.6 k V, is measured with an image spectrograph by Doppler shift effect of Balmer-α-radiation spectrum emitted from fast hydrogen particles. The tendency of proton ratio with the ion density in experiment is almost the same as the mode devised by Zhang et al. Okumura et al. only gave the affection of the plasma volume and ion loss area on the proton ratio, but the relationship between the ion density in chamber and the proton ratio was not presented. We give the relationship.