用于普通能谱实验室的基于VME总线的数据获取系统研制

介绍了一套基于VME总线的实验室数据获取系统的设计及应用。此系统主要针对普通核物理或探测器实验室的实验探测器系统,获取系统硬件用通用ADC插件作为模数转换,用基于VME总线的单板机算计进行数据传输。获取程序基于ROOT数据处理平台,可实现在线监控数据,并使用直方图等数据格式将数据存储。通过这套系统获得的碲锌镉探测器对241Am的59 keVγ射线能谱,数据获取速率达4 MB/s。这套数据获取系统可很好地应用在探测器测试及相关实验领域。     

上海光源面探测器图像数据获取与处理系统设计

介绍了上海光源实验站面探测器图像数据的获取与处理系统设计。该系统应用Python语言及相关功能模块,实现了图像矩阵的获取、图像数据的处理和图像界面的显示。小角散射(SAXS)实验表明,该系统具有散射图像噪声去除、散射中心定位等核心功能。测试结果表明,该系统不仅完善了现有光束线站的控制和数据获取系统,而且为开展多种实验方法的图像在线处理打下了基础。     

像素探测器高带宽数据获取系统设计

为适应硅像素探测器研制的需求,设计了硅像素探测器高带宽数据获取系统。该系统针对硅像素探测器高数据的特点进行了设计与优化,实现了单机高速稳定读出的数据获取目标,最高读出带宽可达到686MB/s,同时提供了控制、监测以及实验图像的实时抽样显示等功能。     

外热式等离子体实验装置数据获取和处理系统

介绍了外热式等离子体实验装置数据获取和处理系统的设计与实现。该数据获取和处理系统支持20通道差分信号采样,每通道最高采样率1Msps,基于USB2.0的数据接口的实时传输能力为10M Byte/sec,能够满足外热式等离子体实验装置等离子体流场采样测量的技术要求。     

高能物理实验径迹系统流式数据获取框架的研究

高能物理实验研究基本粒子及其相互作用,需要获取和分析大量的实验数据以发现新粒子或测量已知粒子的特性.随着高能物理实验规模的不断扩大以及加速器能量和亮度的不断提升,海量数据的获取、处理及分析将更具挑战性.在高能物理实验中,径迹系统探测器的通道数和数据量尤为巨大,为了读出和在线处理径迹系统探测器产生的海量数据,本文结合Ha...     

基于VME总线的FADC数据采集系统的建立

Flash ADC可以记录实验中的完整电流或电压波形,为实验数据的离线分析提供更多的信息.本工作利用CAEN V729A四通道40MHz FADC以及峰敏感V785N ADC插件,建立了基于Linux操作系统和VME总线的小型实验数据获取系统.该系统将用作暗物质探测实验中反冲核抑制因子的中子散射测量实验研究的数据获取,并根据实验要求利用系列低能γ(X)射线对该数据采集系统支持的高纯锗(HPGe)探测器进行了能量刻度,得到了高纯锗(HPGe)探测器系统的能量线形和可探测的能量低阈值.     

改进的激光多步共振电离实验技术

描述了一套改进了的利用于激光多步共振电离谱学研究的实验装置和技术.在此技术中,利用加热蒸发的方式产生高温难熔元素的原子流;对激光功率和中性原子流进行实时监测,对测量结果作归一化处理;采用V-F变换器对堆积了的光信号和离子信号作瞬时变换,企图得到堆积的事件个数; CAMAC多道定标获取系统与其联合操作实现原子流强度、共振电离生成的离子数和激光功率等参数的同步获取.通过离线数据分析,能够得到更精确的实验数据.     

基于PXI-5105示波器卡的数据获取系统

为满足质子诱发碎裂反应研究设备（PISA）中探测器系统测试的需求,研制了一套基于PXI-5105示波器卡的数据获取系统。该系统最高采样率达60M/s,可采集宽度为μs量级的波形信号。系统工作在WindowsXP操作系统下,通过一个简易操作的图形用户界面（GUI）控制。数据的在线显示和分析程序基于CERN的ROOT分析平台。通过实验检验,系统工作稳定,最大数据获取速率达50MB/s。     

重子数实验的数据获取系统

概述了重子数实验的实验装置,其中包括探测器装置和数据获取系统。简述了探测器的组成、功能和性能;着重叙述了数据获取系统之构成、功能及所解决的问题。触发判选与数据获取系统较大地抑制了噪声,提高了信噪比和测量精度。该数据获取系统有一定的通用性,其设计方案不仅用于重子数实验,也适用于其他实验如双β实验中所需的符合测量等。     

BEPCⅡ电子环损失参数检测系统设计

采用数字化相位检测技术,设计了一套高精度相位检测系统,将其应用于BEPCⅡ电子环束流相位和腔相位的检测,测量了BEPCⅡ电子环损失参数。测试结果表明:该系统的分辨率为±0.001°。该系统实现了实验数据的快速存储和检索,获取、处理相关数据更加高效、快捷。     

The research about the time-effect of the wettability on the wool surface treated by the Ar plasma jet in the atmospheric pressure

A facility which is called atmospheric pressure and normal temperature plasma jet was introduced in this paper. After the wool surface was treated by this kind of facility with Ar in different irradiating times, the time-effect of the fabric wettability has been weakened, and if the parameters of the irradiating time and the voltage of the facility are appropriate, the time-effect of wettability can be effectively inhibited. With the stable wettability, the fabric can be dressed without PVA (polyvinyl alcohol) which can cause lager pollution in the textile field, so the method without the time-effect of the textile wettability will be useful in the field of clean textile production. Undoubtedly, the stable wettability of textile surface was caused by the stable hydrophilic molecules on the textile surface. Thus, the reaction process and results on the textile surface treated by plasma needs to be studied to optimize the parameters of the irradiating time and the voltage of the plasma jet. So the initial experimental studies on the optimization of the parameters of the plasma jet were discussed in this paper, and the authors believe that the method without the time-effect also can be used in other fields of plasma application.     

Effect of the Discharge Voltage on the Performance of the Hall Thruster

In this paper,a two-dimensional physical model is established according to the discharging process in the Hall thruster discharge channel using the particle-in-cell method.The influences of discharge voltage on the distributions of potential,ion radial flow,and discharge current are investigated in a fixed magnetic field configuration.It is found that,with the increase of discharge voltage,especially during 250-650 V,the ion radial flow and the collision frequency between ions and the wall are decreased,but the discharge current is increased.The electron temperature saturation is observed between 400-450 V and the maximal value decreases during this region.When the discharge voltage reaches 700 V,the potential distribution in the axis direction expands to the anode significantly,the ionization region becomes close to the anode,and the acceleration region grows longer.Besides,ion radial flow and the collision frequency between ions and the wall are also increased when the discharge voltage exceeds 650 V.     

Detecting the meteoroid by measuring the electromagnetic waves excited by the collision between the hypervelocity meteoroid and spacecraft

The electromagnetic pulse excited by the collision between a hypervelocity meteoroid and a spacecraft is studied both numerically and theoretically. It is found that there are two kinds of electromagnetic pulse. The high-frequency electromagnetic pulse may be excited by the sum of all the electric dipoles. Each electron can be considered as an electric dipole. The low-frequency electromagnetic pulse is produced by the Langmuir oscillation of electrons. The energy flux density and the duration time of the excited low-frequency electromagnetic pulse by the meteoroid are also studied in the present paper. It is shown that the energy flux density increases as either the impact speed or the mass of the meteoroid increases. It is also shown that the duration time decreases as both the impact speed and the mass of the meteoroid increase. By measuring the strength and the duration time of the electromagnetic pulse excited by the collision between the hypervelocity meteoroid and spacecraft, we can estimate the speed and the mass of the hypervelocity meteoroid, which will be helpful in space flight and space exploration.     

右侧卧位对左室下壁心肌衰减校正价值的初探

为探讨右侧卧位对左室下壁心肌衰减校正和心梗诊断的价值,对31名正常者和22名冠心病病人同时进行了仰卧位和右侧卧位的^99mTc-MIBI静息心肌显像,病人均作了冠状动脉血管造影。观察正常者在不同体位时下壁形态并通过靶心图计算各区象素计数。判定不同体位各供血区病变诊断的敏感性和特异性。结果表明,右侧卧位时下壁形态显示较好而且计数明显增高,P＜0．05,同时对右冠状动脉病变的敏感性和特异性分别为100％和81．8％,较仰卧位明显提高,结果提示,右侧卧位不仅可使下壁衰减得以校正而且可提高对心梗诊断的准确性。     

Current status of the engineering design of the test modules for the IFMIF

Under Broader Approach (BA) Agreement between EURATOM and Japan, IFMIF/EVEDA (International Fusion Materials Irradiation Facility/Engineering Validation and Engineering Design Activities) has been performed since the middle of 2007. IFMIF presents three main facilities (the Accelerator Facility, Li Target Facility and Test Facilities). A previous design of IFMIF was summarized in the comprehensive design report [1]. The present EVEDA phase aims at producing a detailed, complete and fully integrated engineering design of IFMIF. The delivery of the “Intermediate IFMIF Engineering Design Report” is foreseen mid-2013. The goal of IFMIF is to obtain the indispensable design database to allow the design and licensing of DEMO and ensuring commercial reactors thanks to the materials data set obtained from planned evaluation tests such irradiations in high flux test modules (HFTM-vertical rig, HFTM-horizontal rig), medium flux test modules (creep fatigue test module, tritium release test module, liquid breeder validation module) and low flux test modules of IFMIF. In addition, the Startup Monitoring Module will be used for IFMIF commissioning. This paper is summarizing the overall current progress status of the engineering and conceptual design of the test modules in IFMIF/EVEDA.     

周期计设计中的分段处理问题

本文通过对反应堆周期计响应时间、过冲量及噪声问题的分析,探论周期测量和周期保护信号分别处理的必要性和可能性,目的在于改善周期信号的品质,提高周期计的使用效果。本文首次报道了差分型周期计的响应函数。     

EAST强流离子源电源系统的初步测试运行

测试NBI大功率强流离子源的综合测试台正在建设,已研制了离子源等离子体发生器电源系统、等离子体电极高压电源及梯度极分压器、抑制极负高压电源等电源系统,以及高压传输线及缓冲器,在测试台上开展了对EAST中性束注入器第一台兆瓦级强流离子源样机进行整体电源系统测试和离子源起弧放电的初步测试,完成了离子源电源系统初步性能测试及...