摘要：All commercial electron spin polarimeters work in single channel mode, which is the bottleneck of researches by spin-resolved photoelectron spectroscopy. By adopting the time inversion antisymmetry of the magnetic field, we developed a multichannel spin polarimeter based on normal incident very low energy electron diffraction （VLEED）. The key point to achieve the multi-channel measurements is the spatial resolution of the electron optics. The test of the electron optics shows that the designed spatial resolution can be achieved and an image type spin polarimeter with 100 times 100, totally ten thousand channels is possible to be realized.

摘要：A new kind （two end readout） of Multi-gap Resistive Plate Chamber with long readout-strip （LMRPC） is developed to be used at the large-area Muon Telescope Detector （MTD） at mid-rapidity at RHIC/STAR experiment for Time-of-Flight （TOF） measurement. The LMRPC has an active area of 87 cm× 17 cm, 10 gas gaps of 250 μm arranged in 2 stacks, with readout strips of 2.5 cm wide and 90 cm long. The considerations in LMRPC design related to its performance are discussed in this paper. The cosmic ray test results of a prototype LMRPC show a detection efficiency 〉95% and the time resolution -70 ps.

摘要：A linear accelerator as a new injector for the SSC （Separated Sector Cyclotron） of the HIRFL （Heavy Ion Research Facility Lanzhou） is being designed. The DTL （Drift-Tube-Linac） has been designed to accelerate ^238U^34＋ from 0.140 MeV/u to 0.97 MeV/u. To the first accelerating tank which accelerates ^238U^34＋ to 0.54 MeV/u, the approach of Alternating-Phase-Focusing （APF） is applied. The phase array is obtained by coupling optimization software Dakota and beam optics code LINREV. With the hybrid of Multi- objective Genetic Algorithm （MOGA） and a pattern search method, an optimum array of asynchronous phases is determined. The final growth, both transversely and longitudinally, can meet the design requirements. In this paper, the deign optimization of the APF DTL is presented.

摘要：对用于散裂中子源的质子直线加速器的超导加速段进行了初步设计 ,其中 ,包括加速腔腔形的设计和优化、超导加速段的结构布局 .另外 ,对超导加速腔的加速单元数的选择及设计值 βG 的确定、加速腔的优化原则及束流的动力学性质进行了讨论 .

摘要：离子迁移率探测器(Ion Mobility Spectrometry,IMS)在大气环境下,可以直接对一些物质的分子进行分析,尤其是可实现对爆炸物品和毒品物质分子的在线检测分析,显示出它广泛的应用前景。IMS 的电场设计,是影响IMS物质分辨率的重要因素.对影响IMS电场的因素进行分析后,重新设计了IMS 结构,通过对新、旧结构的电场进行模拟、比较、分析,同时用新设计IMS结构对一些物质进行实际测量分析,所得结果与国际公认结果对比,误差小于±4%,证明新结构电场设计合理有效,与传统IMS 电场设计相比,是优化的IMS电场结构。

摘要：角度准直器在高能质子照相中有着重要作用,既可以利用准直器提高图像对比度,又能通过二次成像实现材料诊断及密度重建,因此减小通过准直器后通量值的误差具有重要意义.本文通过理论分析,提出了一种高能质子照相中准直器设计的方法,通过Geant4程序建立了1.6 GeV的质子成像系统,该系统分别使用理想准直器、拉伸型准直器和利用该方法设计的准直器,并对比通过客体后的通量分布.结果表明,在使用理想准直器和该方法设计的角度准直器时,二者得到的客体的通量分布符合较好,而使用拉伸型准直器时,与使用理想准直器得到的结果相差较大.因此利用理想准直器方法设计的准直器可以很好地减小通量误差.

摘要：介绍了Matlab的Simulink工具包在核电子学电路设计中的仿真功能。在知道系统特性的情况下,通过建立适当的系统模型,可以先不考虑具体电路设计,直接使用抽象的具有一定输入输出的框图来模拟系统的运行环境,且可通过修改程序观察各种参数对系统性能的影响程度,从而来指导实际的电路设计。

摘要：Resistive Plate Chamber （RPC） modules will be used as one part of the cosmic muon veto system in the Daya Bay reactor neutrino experiment. A total of 189 RPC modules will cover the three water pools in the experiment. To achieve track reconstruction and high efficiency, each module consists of 4 layers, each of which contains two sizes of bare chambers. The placement of bare chambers is reversed in different layers to reduce the overlapping dead areas. The module efficiency and patch emciency were studied both in simulation and test of the data analysis. 143 modules have been constructed and tested. The preliminary study shows that the module and patch 3 out of 4 layers efficiency reaches about 98%.

摘要：为了使国际未来直线对撞机达到高的亮度,对撞机的阻尼环必须要有很小的自然发射度．同时,阻尼环要有很大的接收度来接受来自正电子注入系统的大能散、大发射度的正电子束团．对于磁聚焦结构的设计来说,同时达到以上要求是一件很有挑战性的工作．为了降低ILC阻尼环的造价采用修正的FODO结构设计了可以满足ILC要求的阻尼环备用Lattice,并使四极磁铁的数量比起ILC阻尼环BCD设计减少了一半．

摘要：对强流RFQ耦合间隙的确定、二极模稳定杆的设计进行了详细的研究和讨论 .利用现有的RFQ冷模 ,进行了本征模频率的测量、场分布的调试和测量、二极模稳定杆的试验 .并通过与模拟结果的比较 ,验证了模拟程序在RFQ腔体设计中的可靠性 .同时 ,对影响RFQ稳定性设计的物理进行了有益的探讨 .