用于高能物理国际合作的计算机通讯网络

高能物理是一门基础研究的学科,它的许多成果从根本上改变着人类对物质世界的认识,并对其他学科的发展产生着深刻的影响。今日高能物理作为实验科学具有鲜明的大科学特色,它一方面需要当代先进的工业和尖端技术作支持,另一方面在自己的工作方式,数据处理等方面有着巨大的变化。表现在:(1)研究结构的改变。从传统的单个实验室演变为若干实验室的联合,又进一步演变为多个实验室的结合(跨国),例如CERN的UAI由8个国家的17个实验室组成;ALEPH共有29个实验室,分布在11个国家。     

高能物理与网格计算

概略介绍了高能物理实验计算环境的最新发展情况．包括近一些年来国际高能物理实验发展和对计算需求的增长变化;以正在建造中的LHC上的实验为例介绍了为满足这些需求而制订的计算环境规划;网格计算技术诞生的历史及国际高能物理网格技术研究的现状;高能物理网格所需要的网络基础设施的发展情况等。最后介绍了正在起步中的我国高能物理网格技术研究。     

园区无线网的设计与实现

随着网络应用的不断深入,人们对网络的灵活性和易用性提出了更高的要求.本文在分析园区无线网需求的基础上,对园区无线网的接入部署机制、注册系统和安全防护系统分别进行了分析和设计,并以中科院高能物理研究所为例,在原有有线网络接入的基础上,完成了高能所园区无线网的建设,实现了高能所园区内的"随时随地"网络连接.     

LINUX 环境下数据采集与控制系统PCI-VME桥接设备驱动程序的实现

数据采集与控制是高能物理中核电子学应用的重要部分。以一个已实现并投入使用的实际例子介绍在LINUX环境下设计实现数据采集系统PCI-VME桥接设备驱动程序的关键技术。     

BEPCⅡ控制系统动态数据获取与历史数据查询系统的设计与实现

BEPCⅡ是北京正负电子对撞机重大改造工程,国家基础型大科学工程之一.以已经投入运行的BEPCⅡ控制系统动态数据查询系统为依据,较全面地介绍了动态数据获取和历史数据查询系统的体系结构、数据库设计、开发模式与技术、系统环境和系统功能,并图示了部分系统的运行结果.     

高能物理与云计算

高能物理一直是计算技术强有力的推动者,在国际互联网、WEB技术及网格的发展中都做出了积极的贡献.在新的云计算时代,高能物理仍然有着强烈的需求,国际各大高能物理实验室分别启动了多个项目,对云计算技术及应用进行研究.文章介绍了当前云计算发展动态及云计算在高能物理中的应用现状,并对中科院高能所目前开展的云存储、虚拟集群、BE...     

反应堆系统人因事件分析与预防方法及应用

以人因工程学、控制论和安全科学为工具,采用综合集成及实证性方法,研究了人因(事件)分析学科面临的问题和发展趋势、人因事件分类体系、人因事件成因理论、人因事件定量评价方法、人因事件数据采集、处理及数据库、组织管理因素对人因事件的作用和影响、人因事件根原因分析技术、人因事件模式与影响及严重度分析、人因事故防御方法与策略,构建了反应堆系统中人因事件分析理论和方法,且在大亚湾核电站、岭澳核电站获得了成功应用。     

AFS在高能物理计算系统中的应用

高能物理的科学计算是典型的数据密集型计算,作业对数据的依赖程度较高,数据调用非常频繁。因此,提供高可用的数据共享能力、保持数据文件的安全性和一致性、保证数据访问的效率是高能物理计算环境中必须解决的问题。论文将AFS分布式文件系统应用于高能物理计算系统中,不仅能够提供较高安全水平的用户管理功能,而且能够提供跨网络、跨平台的文件共享功能,并有效地控制用户文件副本。同时,科学的配置AFS的复制卷也提高了整个计算环境数据调用的效率。     

研究堆可靠性数据的收集与处理方法研究

面向开展研究堆概率安全分析(PSA)的需求,以研究堆通用可靠性数据库IAEA-TECDOC-930为通用数据源,基于贝叶斯方法建立了研究堆可靠性数据收集与处理方法,并以西安脉冲堆(XAPR)为对象设计开发了研究堆可靠性数据管理与分析系统,通过该系统的应用获取了不确定性较小且能反映本堆特征的部件可靠性参数。     

大规模BES作业提交与管理系统的设计与实现

针对BES作业的特点设计了大规模高能物理作业的提交与管理系统,目的是为物理学家提供一个简洁高效的作业管理平台。系统根据用户要求可将作业发送至不同的计算环境运行,并实时监控作业运行状态,对发生错误的作业自动重新提交。针对数据密集型物理作业的特点,可以将大作业拆分成大量小作业以实现大规模作业提交,从而达到高效并行运行目的。系统采用Web Service技术,选用GSOAP作为传输协议,屏蔽了计算机的异构性,为用户提供方便灵活的多平台作业提交模式。     

High-energy nuclear physics and nuclear astrophysics at the Radium Institute

Research into high-energy nuclear physics and nuclear astrophysics at the Radium Institute is briefly reviewed. The history of cosmic-ray research is outlined, from the early years of the Institute, as well as the history of research on high-energy physics. The basic work on nuclear astrophysics, cosmochronology, and astrochemistry is described. Research at the Institute on direct nuclear reactions, nuclear fragmentation and multifragmentation, deeply inelastic nuclear processes, nuclear fission at high exciting energies, nuclide formation at the limit of stability, multiple particle formation in relativistic internuclear reactions, and other topics is considered. Scientific and methodological accomplishments are noted. V. G. Khlopin Radium Institute. Translated from Atomnaya énergiya, Vol. 86, No. 6, pp. 419–426, June, 1999.     

Research in high-energy particle physics performed on the synchrocyclotron of the laboratory for nuclear problems of the joint institute for nuclear research

Summary In brief summation of the physics research performed on the six-meter synchrocyclotron in the Laboratory for Nuclear Problems, one may say that it has contributed valuable information to high-energy physics. It has broadened our knowledge in this field of modern physics and it has aided in exposing a series of new important problems and indicating effective methods for their study.To a large extent it is due to this research that the young science of high-energy physics has come to occupy a lasting place among the other sciences of our nation.Work on the six-meter synchrocyclotron has proved a good school in developing a large group of Soviet scientists with a mastery of modern physics, as well as engineers and designers with various specialties who have become familiar with totally new techniques.During 1956–1957, as a result of the organization of the Joint Institute for Nuclear Research, the laboratories of the Institute have been enriched by scientists from foreign countries. The Institute has become an international center for nuclear research, and one of its goals is the instruction of groups of physicists from the twelve nations participating in the Institute.On the glorious fortieth anniversary of the Great October, The High-Energy Laboratory of the Joint Institute for Nuclear Research has turned on the gigantic 10 Bev proton synchrotron, opening for modern nuclear physics additional new perspectives for further development.     

MIDAS: A Multilevel Interactive Data Acquisition System

A system is described for using a medium scale computer in real time data acquisition, analysis, and control of high-energy physics experiments utilizing wire spark chambers.     

Development and progress in resistive plate chamber

1 Introduction Resistive plate chamber (RPC) was developed in1981.[1] It exploits gas amplification in a uniformelectric field between two resistive parallel plates.During the past 20 years, to understand the detectorphysics and to improve its efficiency, rate capabilityas well as ageing effect, investigations and develop-ments are lively progressing.[2,3] RPC has several at-tractive features: large pulse, good time and moderatespatical resolution, mechanical simplicity and robust-nes…     

First experiments on the VÉPP-2 positron-electron storage system

The first experiments on high-energy physics are described using the V'EPP-2 positron-electron storage unit. A system of spark chambers was used with photography as the recording medium. Luminosity was measured according to small-angle positron-electron scattering.Translated from Atomnaya Énergiya, Vol. 22, No. 3, pp. 173–175, March, 1967     

The Challenge of High Energy Radiation Dosimetry and Protection

What I hope I have demonstrated by these many examples is that an accelerator health physicist can make contributions in many fields of science. He can, in addition to the various operational tasks that he is charged with, support others in his laboratory. He can do this by designing shielding for new accelerators and storage rings, by consulting with experimenters on background radiation problems that they may encounter, by helping the high energy physicist select appropriate radiation sources for checking out his equipment, by providing him with low energy atomic and nuclear physics calculations, and many other ways. Most of all, he can perform and publish research using the many tools and techniques that are at his disposal at a high-energy accelerator laboratory. This he should do. I would like to end this lecture by quoting from a paper presented by Rindi at the Second International Conference on Accelerator Dosimetry and Experience that was held at Stanford University in 19698: "The health physicist working around high-energy accelerators has the advantage over identical professionals working in more conventional centers of being associated with the most advanced techniques in many scientific fields, particularly those connected with particle detection. Many of the peculiar problems they are bound to solve require the use of some of these sophisticated new techniques. Moreover, it is my opinion that it is also one of their duties to provide a linkage between the physics and the correlated technical activities that they are involved in (or look upon).     

Design and construction of an end-ladder prototype board with a 2-D HW compressor

This paper explains the design and the construction of the prototype of an end-ladder card for the silicon drift detector of a high-energy physics experiment at CERN. The end-ladder performs data reduction, compression, and packing for a data acquisition chain. In particular, the end-ladder card includes a chip whose main function is to execute these tasks. Besides the chip's functions, the end-ladder card interfaces with the front-end electronics and processes and transmits the data set received from the front end through an optical channel to the counting room. The paper also describes this chip and the ongoing tests on its production. In addition, the paper shows details of the end-ladder prototype card's design and of the relative tests that are going to be carried out in the near future.     

BESIII在线软件中的分布式进程通信框架

新一代北京谱议(BESIII)数据获取系统(DAQ)是北京正负电子对撞机(BEPC)上的大型高能物理探测器的关键组成部分,分布式环境下软件的进程通信是设计和实现的关键技术之一.介绍了数据获取系统中所使用的一种分布式进程通信(IPC,Inter Process Communication)框架,该框架基于CORBA系统进行开发.着重描述了该框架在数据获取系统在线软件中的设计、实现及应用.     

用于ICF实验的大型数据库系统的开发

讨论了ICF实验数据采集处理和管理系统中数据库系统的设计，从物理实验的基本需求出发，对数据库系统运行的软硬件环境，数据库系统平台的选择，特殊的录入方法和功能，数据库的结构和应用开发以及当今相关技术状况进行了分析，最后给出了一个实用的集中式实验数据库系统和它在实验中的应用情况。     

Volume reflection of high-energy protons in short bent crystals

Characteristics of volume reflection for high-energy protons in short bent crystals are considered by simulation. The deflection efficiency and angle depend on the bend radius of the crystal. The concurrent process of volume capture of particles into channeling states limits the reflection efficiency. The optimal parameters of a crystal for using it as a beam reflector were determined.It was shown that the deflection efficiency of high-energy proton beams by the sequence of reflections in short bent crystals is high for small deflection angles. This allows considering possible applications of crystal reflectors for the beam collimation of hadrons colliders and for high-energy physics experiments.