智能化γ探头研究

利用Time-to-Count测量方法,同时将单片机和高压电源植入到γ探头中,设计出新型的智能化γ探头.智能化γ探头是一种小型化、一体化的γ射线监测仪器.介绍了智能化γ探头的设计方案,性能指标,探测器的结构设计.此研究已得到工程应用.     

一种压电式声探头的研究

本文研究了一种压电式声探头。介绍了声探头的结构,分析了声能在探头内的传送,计算了声探头的固有频率。研究了一种改善声探头信噪比的措施,介绍了应用互相关技术提高探测系统抗干扰能力的方法,给出了钠空穴噪声的测量结果。这种探头主要应用于探测钠空穴噪声,亦可用于探测沸腾噪声及钠-水反应的声噪声。     

一种压电式声探头的研究

本文研究了一种压电式声探头。介绍了声探头的结构,分析了声能在探头内的传送,计算了声探头的固有频率。研究了一种改善声探头信噪比的措施,介绍了应用互相关技木提高探测系统抗干扰能力的方法,给出了钠空穴噪声的测量结果。这种探头主要应用于探测钠空穴噪声,亦可用于探测沸腾噪声及钠-水反应的声噪声。     

单点源,双探头新型液位计的研究与应用

研制了单点源、双探头核辐射液位计，其测量范围为０—１４０ｇ／ｃｍ２，比单点源、单探头液位计的测量范围扩大１倍，使用效果良好     

北京质子直线加速器的束流测量探头

本文介绍了北京质子直线加速器的束流测量探头如荧光靶探头,束流变压器,发射度测量探头,束流截面测量探头,能散度测量探头,法拉第筒,减能器等的作用,机械结构及加工工艺。     

霍尔探头低温标定装置导冷结构热性能的数值模拟

霍尔探头低温标定装置是对霍尔探头进行低温下磁测性能标定的实验工具。标定装置内,探头的导冷结构的温度分布以及低温下的冷缩变形对霍尔探头标定的准确性有直接的影响。本文运用有限元模拟软件对霍尔探头低温标定装置的导冷结构进行了稳态热分析和冷缩变形分析;对低温下霍尔探头的焦耳效应进行了模拟,研究了霍尔探头的焦耳效应对其标定温度的影响。当制冷机二级冷头温度为4.42 K时,霍尔探头温度模拟结果为6.75 K,霍尔探头轴向冷缩量模拟结果为1.11 mm,实验结果霍尔探头温度6.55 K,模拟结果可靠。     

基于无线通信技术的便携式伽玛能谱仪的研制

介绍一种基于无线通信技术的野外便携式伽玛能谱仪,笔者针对野外测量工作中存在的诸多问题展开研究,提出了主机与探头分离式结构,研制了数字化伽玛能谱探头,开发了基于PDA的应用软件,采用蓝牙技术实现了探头与主机间的近距离无线通信.经测试数字化伽玛能谱探头工作电流小于180mA,无线传输距离可达10米,谱线处理速度和功能进一步增强.     

低能量宽量程碲锌镉探头研制

研制了一种基于碲锌镉的新型低能量宽量程剂量探头.对探头中探测器的电阻、表面漏电流及其探头的光谱响应、剂量检测、可靠性、稳定性等一系列特性进行研究.结果 表明:该探头的能量探测范围可以低至13.9 keV,在59.5 keV能量分辨率为3.69％,可探测0.1μGy/h～10 mGy/h的剂量率范围,可靠性和稳定性达到了...     

测量弥散流膜态沸腾蒸汽温度的差速抽气式探头

本文介绍了一种测量弥散流过热蒸汽温度的特殊探头——差速抽气式温度探头。描述了探头的结构和探头特性标定系统,并讨论了标定试验结果。试验结果表明,该探头性能可靠、调节方便,在低压下测量误差不超过2℃。探头可在较宽的低含汽量范围(xa>O.1或更小)内测定过热蒸汽温度。     

CPR1000机组一回路窄量程温度探头修正及优化

随着核电厂运行周期的增长,反应堆一回路窄量程温度探头特性会发生一定的漂移,一回路热工水力特性等因素的改变也将导致一回路平均温度加法器以及温度偏差加法器参数设置的不合理,需根据一回路温度探头交叉比较数据对一回路窄量程温度探头及其加法器进行修正。针对可能出现的交叉比较超差现象,提出了修正方法:一回路窄量程温度探头三点曲线拟合修正法和一回路平均温度加法器以及温度偏差加法器根据偏差量两点拟合修正法。从排除固有温度偏差因素,多工况权重系数法和横、纵向趋势比对3个方面提出优化和改进措施及方案。这些措施及方案措施及方案工程现场的应用证明了其可行性和有效性。     

基于容性感应探针测量方法的研究

介绍了利用兰州重离子加速器束流输运线上的圆柱型容性感应探针进行无阻挡束流强度测量方法的研究。该方法在测量束流相宽和中心相位的同时通过对感应束流信号的计算．进行束流强度监测,以满足HIRFL束流诊断系统在线测量及调束的要求;说明了测量束流感应信号并从中提取束团相宽,束流相位及束流强度等信息的原理;介绍了测量系统装置及虚拟仪器技术在本系统中的应用,并给出了测量结果和测量精度的分析。     

甲功测量的误差分析和探测技术的研究

从医院使用思虑国仪的角度全面系统的讨论甲功仪测量的各种误差，测定FH604探头的计数率曲线簇，讨论它各部分屏蔽的意义，分析标准源和病人测定的定位误差，利用能谱仪测定样模对131I谱分布的影响，从能谱角度分析常稳和长期稳定性，介绍了几种改进稳定性刻度仪器的方法，在讨论统计误差的基础上提供了一些合理的测量方法，可以作为制定标准的参考，结果对医院选择甲功仪，医生使用甲功仪和厂方设计均有益。     

简单可靠的双探针束流剖面仪

本文介绍了步进电机驱动的双探针束流剖面仪。它可以测量强直流离子束中的束流分布。其扫描速度和步长均可调节,并同时记录在X-Y记录仪上。由于采用了步进电机,使得定位准确,重复性好。本文还对探针测量方法作了理论分析,并给出选取探针直径的原则。     

Measurement of Zonal Flows in a Tokamak Using Langmuir Probe Array

Zonal flows have been measured with several novel Langmuir probe array on the HT-7 tokamak since 2002. The forked probe and its improved generation, the farmer forked probe were designed based on the original idea of the Reynolds stress triple tips array. In order to measure the radial shearing rate of zonal flows, the pyramid probe was also designed. This paper addresses the technical aspects regarding this new application. Since the zonal flows dynamics is now widely believed crucial to plasma confinement physics, an important application field of Langmuir probe was opened up.     

环形单针双束流截面测量技术

利用一个三维环形探针对离子束进行旋转扫描，可以同时测量到两个束流截面的大小和位置，估算出二截面附近的聚焦梯度以及束腰的移动。     

A small dimension intraoperative probe

This article introduces the usage of the intraoperative probe in surgical based on RGS and proposes one method to design the probe,Also,a charge-sensitive preamplifier used in semiconductor detector was constructed which can reduce the dimension of the probe.At last the probe is tested by some animal experiments.Results showed that the property of this system are reliable.     

Fast radial scanning probe system on KTX

A fast radial scanning probe system was constructed for the Keda Torus eXperiment(KTX) to measure the profiles of boundary plasma parameters such as floating potential, electron density,temperature, transport fluxes, etc. The scanning probe system is driven by slow and fast motion mechanisms, corresponding to the stand-by movement of a stepping motor and the fast scanning movement of a high-torque servo-motor, respectively. In fast scanning, the scanner drives the probe radially up to 20 cm at a maximum velocity of 4.0 m s~(-1). A noncontact magnetic grating ruler with a high spatial resolution of 5 μm is used for the displacement measurement. New scanning probe can reach the center of plasmas rapidly. The comparison of plasma floating potential profiles obtained by a fixed radial rake probe and the single scanning probe suggests that the high-speed scanning probe system is reliable for measuring edge plasma parameter profiles on the KTX device.     

高精度三维霍尔探头的标定

介绍了在上海光源(SSRF)磁测实验室中,用可旋转标准电磁铁产生均匀磁场,进行霍尔探头的温度、非线性的标定以及平面霍尔效应的研究;解决了测量椭圆极化型波荡器时水平磁场与垂直磁场间相互影响的问题,提高了磁场测量的精度。     

Automatic emissive probe apparatus for accurate plasma and vacuum space potential measurements

We have developed an automatic emissive probe apparatus based on the improved inflection point method of the emissive probe for accurate measurements of both plasma potential and vacuum space potential.The apparatus consists of a computer controlled data acquisition card,a working circuit composed by a biasing unit and a heating unit,as well as an emissive probe.With the set parameters of the probe scanning bias,the probe heating current and the fitting range,the apparatus can automatically execute the improved inflection point method and give the measured result.The validity of the automatic emissive probe apparatus is demonstrated in a test measurement of vacuum potential distribution between two parallel plates,showing an excellent accuracy of 0.1 V.Plasma potential was also measured,exhibiting high efficiency and convenient use of the apparatus for space potential measurements.     

Vibrations of probe used for the defect detection of helical heating tubes in a fast breeder reactor: Part 1. Experimental results by using mock-up

This paper deals with the vibration and the sensor signal noise of the eddy current testing (ECT) probe used for a defect detection of helical heating tubes in the fast breeder reactor “Monju”, developed in Japan. ECT probes are used for the detection of defects in a heating tube. The heating tube is composed of a helical tube and a straight tube because of their advantages of thermal efficiency and saving space. No vibrations of the ECT probe have been generated in usual straight heating tubes. However, vibrations of the ECT probe in the helical tube cause some noise and decrease the sensitivity of the ECT probe. The experiment was performed using a mock-up, and the noise characteristics of an ECT sensor mounted in an ECT probe were examined. The experimental results showed that the sensor signal noise during the insertion process of the ECT probe was higher than that of the return process, and vibrations of the insertion process had a certain emerging frequency. Attaching the long and flexible guide probe to the top of the ECT probe was an effective countermeasure against sensor signal noise.