光学电流传感器的新进展

利用法拉第磁电效应可实现电流的光学法测量.采用光学纤维或光学玻璃作为传感元件的电流传感器一直是研究和发展的重要课题.在本文中将概述光纤电流传感器中的主要问题,并着重介绍光学玻璃电流传感器的最新发展成果.     

Silver(I)-promoted Oxidation and Ring-enlargement Reactions of Unstrained Hydrocarbons, Polyphenyl-cyclopentadiene

The activation of carbon-carbon bonds by soluble transitional metal complexes has been one of the most prominent challenges in recent years1-3. Despite the inertness of carbon-carbon bonds, some possible ways to cleave carbon-carbon bonds have been devised, such as relieving ring energy4, inducing aromatic stabilization5, forming stable metallocyclic complexes6, etc. Silver salts, such as silver perchlorate and silver trifluoroacetate, play an important role in carbon-carbon bond activation,…     

高温超导微波谐振器非线性测试及应用研究

本文对高温超导微波谐振器的非线性特性做了测试，对测试结果进行了分析t并对该谐振器的构造方案做了分析．发展并实现了利用中等功率电平进行微波临界电流附近高温超导强非线性特性的测试方案．     

Variation of Ionization Mechanisms with q in the Collision of He^2＋ with C^q＋

The ionization process in the collisions of He^2＋ with C^q＋ （q = 0-5） is investigated by using the continuum-distorted-wave eikonal-initial-state approximation. Double-differential cross sections for 1s and 2s sub-shells are obtained at the electron-ejected angle θ = 0° with the projectile energy ranging from 30keV/u to 10MeV/u. Variation of ionization mechanisms with q in C^q＋ is studied, and the dependences on the projectile energies and target sub-shells are also discussed. It is found that in the whole energy range, the absolute values of soft collision （SC） and binary encounter （BE） peaks decrease with increasing q. For the lower incident energies, the electron capture to the projectile continuum （ECC） peak decrease with increasing q as well as SC and BE peaks. For the higher incident energies （〉 1 MeV/u）, the absolute value of ECC peak increases with increasing q, so that the crossings of cross sections appear for C^q＋ with different q. This can be explained by the matching of velocities between the projectile and the electron initially bound to the target.     

缺项广义Dirichlet级数所表示的整函数的增长性

对于有限级广义Dirichlet级数所表示的整函数f(s),引进级ρ_R,型■_R,分别讨论它们与在水平直线上的级ρ_L,型■_L之间的关系．应用于,Taylor级数时,有类似结果．     

新型高功率微波探测器

 通过对半导体材料中载流子迁移率的特性分析，在原HPM探测器的基础上，提出了探测器中半导体传感器的新设计，使探测器的检测灵敏度提高一个量级；同时研制成功S波段HPM探测器。在传感器的加工方面采用了新的工艺，并对电源进行了改进，使之功能完善、使用简单、具有实用性。其电源偏压在40V时，X波段的探测器在60kW时输出检测脉冲信号幅度高达9V，S波段的探测器在600kW时输出检测脉冲信号幅度高达10V，可适用于10～500ns脉宽的HPM功率测量。     

Simulation of Z-Pinch Processes of Nested Tungsten Wire-Array on Angara-5-1 Facility

Based on the hydrodynamic shell-on-shell collision model, the Z-pinch processes of nested tungsten wire-array in Sino-Russian joint experiments on Angara-5-1 facility are simulated by means of our one-dimensional three-temperature radiation magneto-hydrodynamic code. The results show the evolutions of x-ray radiation burst, implosion trajectories of interfaces, current transfer in inner and outer wire-array plasmas, and the temporal and spatial changes of magnetic field and current density in the process. About 20% of the total driven current is transferred into the inner wire-array plasma by convection and diffusion of magnetic field when the two shells are pinched closest. Compared to the measured x-ray power, the simulated full width at half maximum and time at the strongest radiation agree approximately with the measured values. It is also demonstrated in our simulation that the radiation of nested wire-array Z-pinch is enhanced. The effects of fluctuations of driven current on yields of x-ray are also investigated.     

酸性条件下多苯基取代环戊二烯的氧化扩环反应

报道了空气(或氧气)存在的条件下,由高氯酸引发多苯基取代环戊二烯发生新颖的碳-碳键断裂扩环反应,在此反应中,氧原子插入到环戊二烯环中形成相应的六元环吡喃盐类化合物.分别用红外光谱、核磁共振氢谱、碳谱、质谱以及元素分析对所得化合物进行了表征.     

A～50区同位素的相对论平均场研究

利用轴向形变相对论平均场理论计算了A～50区的核基态性质,结果表明,在Fe同位素链中最稳定的核是⁵⁶Fe和⁵⁸Fe而不是通常的⁵⁴Fe;给出了⁴⁶Cr,⁵⁰Fe和⁵⁴N(N=Z－2),⁴⁵Cr,⁴⁹Fe和⁵³Ni(N=Z－3)核的质子和中子分离能,分析了它们的稳定性.