Simulation of high order short range wakefields

We present a formalism for incorporating intra-bunch wake fields into particle-by-particle tracking codes, such as MERLIN and BDSIM. Higher order wake fields are in- corporated in a manner which is computationally efficient. Standard formulae for geometric, resistive and dielectric wake fields are included for various apertures, particularly those relevant for ILC collimators

Induced activation in accelerator components

The residual activity induced in particle accelerators is a serious issue from the point of view of radiation safety as the long-lived radionuclides produced by fast or moderated neutrons and impact protons cause problems of radiation exposure for staff involved in the maintenance work and when decommissioning the facility. This paper presents activation studies of the magnets and collimators in the High Energy Beam Transport line of the European Spallation Source due to the backscattered neutrons from the target and also due to the direct proton interactions and their secondaries. An estimate of the radionuclide inventory and induced activation are predicted using the GEANT4 code

Design and Implementation of the E-government system of the administrative regional integration

随着我国国民经济以及社会各领域的快速发展，信息化已经成为各级政府部门增强治国理政能力、提高社会管理水平、拓宽公共服务渠道的重要手段，电子政务成为国家发展的重要的领域之一。我国电子政务建设虽然起步晚，但是发展迅速，取得了一系列的成绩。同时，由于缺乏相应的顶层设计和总体规划，数据共享、业务协同难等问题导致发展过程中遇到了诸多阻碍。 本文着重以政务信息资源的整合共享等为着力点，建设公共基础信息资源库和业务专题信息资源库。通过三个基础支撑平台,即业务基础软件平台、共享交换平台、GIS地理信息平台。支撑实现六大应用系统，包括社会管理系统、行政审批系统、协同办公和电子公文交换系统、效能监察系统、辅助决策...With the continuous development of China's national economy and all areas of society, informational has become the government departments’ tool to enhance the governing ability。It not only raise the level of public administration, and also become an important means of widening public service channels. E-government has become one of the most important part of national development. Although China’s ...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223001

Talk about the perfection of the System of Time Limit for Quotations in Civil Actions in China

“公正与效率”是新时代司法制度改革的主题。为实现公正与效率，1999年最高人民法院公布了《人民法院五年改革纲要》，进一步要求在民事诉讼中加强当事人的举证责任。2001年12月21日最高人民法院公布《关于民事诉讼证据的若干规定》，由此确立了我国举证时限制度，标志着我国“证据随时提出主义”向“证据适时提出主义”的转变。该规定强化了当事人的举证，对于实现民事审判公正与效率，完善我国民事诉讼制度具有重要而深远的意义。本文除引言和结语外，分为三章。本文第一章从举证时限制度的含义出发，分析制度的构成及价值，指出保障民事诉讼当事人诉讼权利平等与公正及提高诉讼效率是举证时限制度所要实现的目标和价值取向。同时，...“Equity and efficiency” are the themes of the judicial system restructuring in the new epoch. In order to realize the equity and efficiency, the Supreme Court issued 《the program for the court reformation in five years》 in 1999. It claimed to strengthen the onus probandi for the parties in the civil actions ulteriorly. The Supreme Court issued 《Some Provisions on the Evidences in Civil Action》on D...学位：法律硕士院系专业：法学院法律系_法律硕士(JM)学号：X20010807

Limits on spin-dependent WIMP-nucleon cross-sections from the first ZEPLIN-II data

The first underground data run of the ZEPLIN-II experiment has set a limit on the nuclear recoil rate in the two-phase xenon detector for direct dark matter searches. In this paper the results from this run are converted into the limits on spin-dependent WIMP-proton and WIMP-neutron cross-sections. The minimum of the curve for WIMP-neutron cross-section corresponds to 0.07 pb at a WIMP mass of around 65 GeV.Comment: 12 pages, 2 figures, to be published in Physics Letters

Neutron- and muon-induced background in underground physics experiments

Background induced by neutrons in deep underground laboratories is a critical issue for all experiments looking for rare events, such as dark matter interactions or neutrinoless 2-beta decay. Neutrons can be produced either by natural radioactivity, via spontaneous fission or (alpha,n) reactions, or by interactions initiated by high-energy cosmic rays. In all underground experiments, Monte Carlo simulations of neutron background play a crucial role for the evaluation of the total background rate and for the optimization of rejection strategies. The Monte Carlo methods that are commonly employed to evaluate neutron-induced background and to optimize the experimental setup, are reviewed and discussed. Focus is given to the issue of reliability of Monte Carlo background estimates.Comment: 10 pages, 8 figures. Presented in the IV ILIAS Annual Meeting. Accepted for publication on EPJ

The ZEPLIN-III dark matter detector: instrument design, manufacture and commissioning

We present details of the technical design and manufacture of the ZEPLIN-III dark matter experiment. ZEPLIN-III is a two-phase xenon detector which measures both the scintillation light and the ionisation charge generated in the liquid by interacting particles and radiation. The instrument design is driven by both the physics requirements and by the technology requirements surrounding the use of liquid xenon. These include considerations of key performance parameters, such as the efficiency of scintillation light collection, restrictions placed on the use of materials to control the inherent radioactivity levels, attainment of high vacuum levels and chemical contamination control. The successful solution has involved a number of novel design and manufacturing features which will be of specific use to future generations of direct dark matter search experiments as they struggle with similar and progressively more demanding requirements.Comment: 25 pages, 19 figures. Submitted to Astropart. Phys. Some figures down sampled to reduce siz