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dielectric    
相关语句
  介电
    Solid state Blumlein line with high dielectric constant polymer-composite
    高介电常数复合介质固态Blumlein线
短句来源
    By using meson dielectric function constructured by standard σ-ω mixiingmethod, we calculate the collective excitation spectra(or dispersion relation)ofσ,ωmesons in nuclear matter, The ρ°-ωmixing effect on the collective excitation is studiedand the mixing effect on σ,ω dispersion relation is found small.
    用标准σ-ω混合方法所构造的介子介电函数,计算了核物质中σ,ω介子的集体激发能谱(或色散关系),并考虑ρ°-ω混合的效应,结果表明ρ°-ω混合对色散关系的影响很小。
短句来源
    The prospective solid Blumlein PFLs using polymer composites as energy storage dielectric can satisfy many application needs.
    如果配以工作电压更高的低导通电感、低导通电阻的开关,采用高介电常数的陶瓷聚合物复合介质作为储能材料的脉冲形成线具有输出较理想的高压高功率脉冲的能力。
短句来源
    Dielectric tensors concerned is given by a normal transform.
    由此带来的介电张量修正用矩阵变换实现。
短句来源
    The effect of total irradiation dose on the hysteresis loops and C V characteristics of PZT ferroelectric capacitors was investigated. It shows that, with the increase of the γ dose, the remanent polarization and coercive fields of the PZT capacitors increased while the dielectric constant decreased because of the effects of radiation induced defects.
    研究了γ辐照积累剂量对PZT铁电电容的电滞回线和CV特性的影响,结果表明,在积累剂量辐照过程中,由于辐照感生缺陷的影响,剩余极化和矫顽场增加,介电常数下降。
短句来源
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  介质
    The design of strip Blumlein line was presented with the polymer-composite as energy storage dielectric and GaAs-PCSS as circuit switch.
    以陶瓷聚合物复合介质作为储能介质,砷化镓光导半导体开关作为开关,设计了带状Blumlein线并对其进行了实验研究。
短句来源
    Influence of polished surface of electrodes on high electrical breakdown for water dielectric
    电极表面光滑程度对水介质高电压击穿的影响
短句来源
    Solid state Blumlein line with high dielectric constant polymer-composite
    高介电常数复合介质固态Blumlein线
短句来源
    By means of a coaxial apparatus, a high electrical breakdown experiment for pressurized water dielectric with microsecond charging was carried out. The experimental results were presented and analyzed.
    采用水介质同轴电极实验装置,开展了μs级充电加压水介质击穿实验研究,并对实验结果进行了分析和讨论,结果表明在水介质正电极击穿类型的实验中,常压下水介质击穿场强与Martin公式吻合。
短句来源
    Profiles of Ion-matrix Sheath around Planar Dielectric
    平面介质靶周围离子体鞘的特征
短句来源
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  电介质
    Base on the experience, window failures can be separated into three basic categories: dielectric failure, thermal failure and boundary failure.
    电介质故障、热故障和边缘故障是波导窗故障的三种基本类型;
短句来源
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  dielectric
Because of the existence of nanopores, the dielectric constant of PI films decreased by a wide margin and was less than 2.0 at a PU mass fraction of 20%.
      
It implies that this is an effective means to reduce the dielectric constant of PI, but it also causes the decrease of tensile strength and the rise of water absorption.
      
Lead zirconium titanate (PZT) films (Zr/Ti=45:55) with a high dielectric constant are prepared successfully on the low-resistance Si substrate in sol-gel dip-coating process with PT film used as the buffer layer.
      
The dielectric and ferroelectric properties of the films as well as the relationship between crystallization and preparing condition are studied.
      
The relative dielectric constant εr and the dissipation factor tgδ of the PZT thin films were measured with an LCR meter and were found to be 158 and 0.04-0.005, respectively.
      
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A device for enlarging nuclear track in dielectric material bymeans of electrochemical etching has been deyeloped in our laboratory.Theelectronic system of the device is designed to operate over the frequency range from 50 to 5000Hz with a sinusoidal output of variable voltage(0—1100V).Polycarbonate foil is used as a track detector,neutron inducedrecoil tracks can be recorded in it.Basic parameters of track etching,forexample,the strength of feild,the frequency,the etching duration and theconcentration...

A device for enlarging nuclear track in dielectric material bymeans of electrochemical etching has been deyeloped in our laboratory.Theelectronic system of the device is designed to operate over the frequency range from 50 to 5000Hz with a sinusoidal output of variable voltage(0—1100V).Polycarbonate foil is used as a track detector,neutron inducedrecoil tracks can be recorded in it.Basic parameters of track etching,forexample,the strength of feild,the frequency,the etching duration and theconcentration of etchant have been studied.For 180μm polycarbonate foil,the neutron sensitivity,the energy dependance,the directional response,the stability of etched tracks and the background have been estimated.Theoptimum etching conditions obtained are as followsthe strength of feild:13.5kV/cmthe frequency:2.SKH.6N KOH at room temperature for 6 hours.Under above mentioned conditions,the following perfomances of etch-ing track are obtained.The mean diameter of etched track is about 50μm.The sensitiveties for ~(252)Cf and Am-Be neutron sources are 0.27×10~(-6)and1.8×10~(-6)(tracks/neutron)respectively,while for monoenegetic neutrons of4.0 MeV and 14.8 MeV,the values are 2.2x10~(-6)and 3.7×10~(-6)(tracks/neutron)respectively.The density of background tracks is about 8 tracks/cm~2(after pre-etching).The electrochemical etching technique has the basicadvantage of facilitating etched track to be clearly seen by enlarging thesize of discharged pit,which makes the track counting simplier and quickerand more reliable.

我们研制了一台供扩大固体内核径迹用的电化学蚀刻装置。它可以输出电压和频率皆可调的正弦波(电压0—1100伏,频率50—5000赫)。采用聚碳酸酯膜记录快中子引起的反冲核径迹。对径迹蚀刻的几个主要参量如电场强度、频率、蚀刻时间和蚀刻液的浓度等进行了研究,还对聚碳酸酯的中子灵敏度、能量响应、方向响应、径迹稳定性及本底进行了测量。对于180微米厚的聚碳酸酯膜,实验确定的最佳蚀刻条件为:电场强度13.5千伏/厘米,电场交变频率2.5千赫,6N KOH,15℃,5小时。在此条件下,电化学蚀刻的快中子反冲径迹平均直径约为50微米;对~(252)Cf、AmBe、4.0和14.8兆电子伏中子的灵敏度分别是2.7×10~(-7)、1.8×10~(-6)、2.2×10~(-6)和3.7×10~(-6)(径迹/中子);经预蚀刻的本底径迹密度约为8(径迹/厘米~2)。实验表明,固体核径迹探测器电化学蚀刻方法的显著优点是,它能把反冲核径迹放大成清晰可见的放电蚀坑,从而使径迹测量变得相当简单、快速和可靠。

A 1011W water-dielectric high current relativistic electric beam accelerator has been developed. The machine configuration, principle, parameters and operation modes are described briefly. The experiments of the diode focus are presented in detail and the comparison of experimental results for various cathode geometries is given.The pinched electron beam behaviour is diagnosed by means of an x-ray pinhole camera, a graphite-calorimeter and a scintillator-optical fiber-photomul tiplier system. The experimental...

A 1011W water-dielectric high current relativistic electric beam accelerator has been developed. The machine configuration, principle, parameters and operation modes are described briefly. The experiments of the diode focus are presented in detail and the comparison of experimental results for various cathode geometries is given.The pinched electron beam behaviour is diagnosed by means of an x-ray pinhole camera, a graphite-calorimeter and a scintillator-optical fiber-photomul tiplier system. The experimental results are also given here.

本文简述10~(11)W水介质强流脉冲电子束加速器的结构、原理、参数和运行情况;较详细地介绍了二极管聚焦实验,对不同形状的二极管使用结果做了比较。本文还给出了X射线针孔相机、石墨差分量热计和闪烁体-光纤-光电倍增管装置对箍缩电子束特性的测试结果。

A new kind of lower hybrid wave launching structure-multijunction grill has been developed. In this new launcher the RF power is divided by means of an E-plane of rectangle waveguid and the phase difference of adjacent waveguides is obtained by a suitable length of the dielectric teflon inserted into corresponding waveguides. Lower hybird current drive experiments have been succes-fully performed in HT-6M Tokamak with this multijunction grill. A driven efficiency DC up to 0.55 (1013cm-3 . m . kA/kW) has...

A new kind of lower hybrid wave launching structure-multijunction grill has been developed. In this new launcher the RF power is divided by means of an E-plane of rectangle waveguid and the phase difference of adjacent waveguides is obtained by a suitable length of the dielectric teflon inserted into corresponding waveguides. Lower hybird current drive experiments have been succes-fully performed in HT-6M Tokamak with this multijunction grill. A driven efficiency DC up to 0.55 (1013cm-3 . m . kA/kW) has been obtained. The influence of LHCD on MHD behaviour of plasma has been clearly observed too, though the RF power coupled to plasma is very low.

研制了一种新型的低杂波耦合结构——多结波导阵天线。在这种天线中,功率分配是通过矩形波导的E面结来实现的,相邻波导间的相位差则利用在子波导中插入不同长度的聚四氟乙烯介质块来获得。使用这种多结波导陈天线,我们在HT-6M托卡马克装置上成功地开展了低杂波电流驱动实验,取得了η_(CD)=0.55(10~(13)cm~(-3)·m·kA/kW)的好结果,并在很低的微波功率水平下观察到了对MHD行为的影响。

 
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