共查询到18条相似文献,搜索用时 62 毫秒
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EFFECTOFRADIALELECTRICALFIELDONNEOCLASSICALTRANSPORTINTOKAMAKSEFFECTOFRADIALELECTRICALFIELDONNEOCLASSICALTRANSPORTINTOKAMAKS¥... 相似文献
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本文描述HL-1装置屏蔽板对欧姆变压器杂散场屏蔽效应的实验研究和理论计算,模拟实验结果与HL-1装置的理论计算值符合较好。 相似文献
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Li Taihua An Zhu Luo Zhengming Center for Radiation Physics Institute of Nuclear Science Technology Sichuan Union University Chengdu 《原子与分子物理学报》1997,(1)
MEASUREMENTSOFFeANDCuK-ShelIONIZATIONCROSSSECTIONSBYSLOWELECTRONIMPACTLiTaihuaAnZhuLuoZhengmingCenterforRadiationPhysics,Ins... 相似文献
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Chen Zhangjin Shi Qicun Chen Ji Xu Kezun Department of Modern Physics University of Science Technology of China Hefei 《原子与分子物理学报》1997,(1)
ELECTRONMOMENTUMSPECTRAOFEXCITEDHe(21S)ANDHe(23S)ChenZhangjinShiQicunChenJiXuKezunDepartmentofModernPhysics,UniversityofScien... 相似文献
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THEORETICALCALCULATIONOFATOMICANDMOLECULARDATAPeiChunchuanPurpleMountainObservatoryAcademiaSinicaNanjing210008ABSTRACTByusin... 相似文献
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Chen Zhangjin a b Xu Kezun b Xu Fuxin aa Department of Physics Anhui Unviersity Hefei b Department of Modern Physics University of Science Technology of China Hefei 《原子与分子物理学报》1998,(3)
LOWENERGYTRIPLEDIFFERENTIALCROSSSECTIONSFORELECTRONIMPACTIONIZATIONOFHYDROGENChenZhangjina,bXuKezunbXuFuxinaaDepartmentofPhy... 相似文献
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将不确定度原理应用于光纤端部位置不确定度分析,对影响被测量不确定度的输入分量如CCD本身特性、A/D转换器精度、环境温度、光源电压波动按A、B类标准不确定度进行讨论,并与由实验直接测得被测量所得不确定度进行了比较,以证明分析讨论的可靠性。 相似文献
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本文研究了一种自建的低成本简易磁屏蔽室及其操控条件,提出了能被高温超导rf SQUID仪器所接受的简易磁屏蔽室,并且运用由该磁屏蔽室和rf SQUID梯度计所构成的组合系统测量了微弱的生物磁信号.研究结果表明,该磁屏蔽室能够有效降低电磁干扰,确保SQUID长时稳定工作,基于该磁屏蔽室的复合MCG测量系统具备捕捉微弱生物磁信号的能力,且所得信号具有可接受的信噪比.这将使得开发一种低造价的实用高温超导MCG测量系统成为现实. 相似文献
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Jackowski K Jaszuński M Kamieński B Wilczek M 《Journal of magnetic resonance (San Diego, Calif. : 1997)》2008,193(1):147-149
We present new gas-phase NMR spectra which relate the resonance frequency of (3)He nucleus to the resonance frequency of the proton in tetramethylsilane (TMS). We discuss the dependence of (3)He resonance frequency on the density of the solvent gas, and we consider in detail the absolute shielding scales of both nuclei. Finally, we analyse the accuracy of the results, using the relationship between the resonance frequencies, absolute shielding constants and magnetic dipole moments of (1)H and (3)He nuclei. 相似文献
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利用OPERA/TOSCA大型有限元分析软件对中国散裂中子源/快循环同步环(CSNS/RCS)注入系统的直流C型特种电切割磁铁进行了2维/3维磁场计算和设计,通过放置1 mm厚的DT4铁磁性屏蔽板,可将循环束流轨道上的边缘漏场比降低至2.610-4,大大减小了切割板外侧的边缘漏场对循环束流动力学的影响。另外,对该类型切割磁铁的线圈做了详细的水冷计算,以保证磁铁能在适当的温度下运行。结果表明,无论从物理上还是工程上,该类型磁铁完全可以满足CSNS/RCS注入系统物理设计以及长期稳定运行的要求。 相似文献
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This paper describes a superconducting magnet system for the China Accelerator Driven System (CADS). The magnetic field is provided by one main, two bucking and four racetrack coils. The main coil produces a central field of up to 7 T and the effective length is more than 140 mm, the two bucking coils can shield most of the fringe field, and the four racetrack superconducting coils produce the steering magnetic field. Its leakage field in the cavity zone is about 5× 10-5 T when the shielding material Niobium and cryogenic permalloy are used as the Meissner shielding and passive shielding respectively. The quench calculations and protection system are also discussed. 相似文献
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相对论重离子碰撞的拓扑荷作用破坏作用平面两侧不同手征性的夸克数目的平衡,从而引起P和CP破坏特征。本工作主要分析RHIC和LHC能区的手征电荷分离作用,分析手征电荷分离随碰撞中心度、碰撞能量和核屏蔽等依赖关系。并未发现手征电荷分离效应与碰撞能量大小有非常紧密的依赖关系,但发现核屏蔽效应对手征电荷分离有重要的影响,与不考虑屏蔽效应相比,考虑屏蔽效应会使手征分离效应明显压低,由于屏蔽效应出现,使得a++(a--)的分布与a+-(a-+)分布并不对称。并且还发现手征分离效应主要发生在碰撞参量较大的周边碰撞,越接近中心碰撞,手征分离效应几乎可以忽略。The topological charge interactions in relativistic heavy ion collisions cause quark chirality imbalance, resulting in charge separation under the strong magnetic field and local P and CP violation. In this paper, the chiral charge separation at RHIC and LHC energies is systematically analyzed as functions of the collision centrality, the collision energy and the nuclear shielding factor. It is found that there is not a very close dependence of the chiral charge separation effect on the collision energies, but that has an important dependence on nuclear shielding factor. Compared with the non-shielding effect, the shielding effect can reduce the chiral separation effect obviously. Due to the shielding effect, the distribution of a++(a--) and the distribution of a+-(a-+) are asymmetric. One also finds that chiral separation effect, which is almost negligible when more close to the central collision, occurs mainly in the peripheral collision for larger impact parameter. 相似文献