摘要：The experimental research project of single event effect source technology is a national key project of the“Core Electronic Devices,High-end Universal Chips and Basic Software Products”Major National Science and Technology *** research is aiming at studying the single event effect of high energy heavy ions with wide LET value.A new experimental terminal is going to be built to test researches on this *** new terminal mainly uses the slowextraction high-energy heavy ion beam from the HIRFL *** beam will be used to pass through RIBLL2 beam transmission line and then pass through a series of focusing and deflection elements and it will finally focus on small beam spot size and scan uniformly at the *** beam is used to carry out the simulation study of radiation resistance of aerospace devices.

摘要：分析了酚醛模压复合材料制品出现裂纹的特点及其产生原因;针对这些原因提出了从制品结构设计、模具设计、成型工艺、后处理、贮存条件等5方面采取多项改进措施来减小或消除制品应力。经试验证明,这些改进措施有效,明显减少了制品出现裂纹现象,对生产实践具有较强的指导意义。

摘要：A FPGA based time-to-digital converter(TDC)with high precision was designed and realized.A technique that combines coarse time counting and fine time measurement was adopted to achieve a large time measurement range and a fine time *** method of“wave-union”was used in the time interpolation to improve the time *** performance of TDC was tested under lab conditions and the results show that the time resolution of TDC is less than 40 *** has been applied for pulse width(time-over-threshold,TOT)measurement.

摘要：为更好地保障中国科学院近代物理研究所重离子加速器(HIRFL)的稳定运行,本文研究设计了基于物联网的状态诊断系统。针对HIRFL中设备数量庞大、种类复杂的特点,采用物联网的设计架构,利用各种传感器进行数据采集,并通过网络传输给中央控制系统中的数据库,由服务器中运行的控制软件对这些数据进行综合分析,给出合理的建议并发出相应的指令。根据HIRFL的实际情况,初步设计了1个HIRFL状态诊断系统模型,包括底层的硬件设计和上层的软件设计以及界面设计。部分控制界面已上线运行,并在实际运行中得到了检验,取得了一定的加速器状态诊断效果。

摘要：根据数控交流伺服工作台进给系统从静止到宏观运动的过渡时间,和零速度时刻的指令加速度大小呈反比关系,区分摩擦力矩的预滑动区和滑动区,由此提出基于力矩值估计的摩擦补偿方法;在设定指令加速度后,基于命令力矩值的摩擦力矩模型,不需要测量速度就可以补偿工作台进给系统中的摩擦。同时,考虑到参数的不确定性,设计非线性摩擦自适应控制方案,对其稳定性进行理论证明。在交流伺服工作台进给系统上对基于摩擦力矩值估计的自适应前馈补偿方法进行验证。试验结果表明,基于预滑—动态摩擦力矩估计模型的自适应前馈补偿方法能实现在不同指令加速度下对期望轨迹的跟踪,并能大大提高系统的跟踪精度。

摘要：为宇宙射线缪子(μ子)测量实验设计了基于FPGA的高精度时间-数字转换器(TDC),结合TDC测量值与GPS提供的标准时间(UTC)精确记录了粒子事件的时间信息。TDC采用粗计数+细时间测量相结合的方式,用计数器实现动态范围大于1 s的粗时间测量;使用FPGA加法进位延时链构建时间内插完成了细时间测量,并借助Wave-Union与bin-by-bin方法提高时间分辨并改善非线性。实验室测试双边沿TDC的时间分辨为16.68 ps,时间测量精度(RMS)好于45 ps。测量结果表明,该TDC满足脉冲前沿时间甄别要求。

摘要：Low Energy intense-highly-charged ion Accelerator Facility(LEAF)is national major research equipment development project Its construction is of great scientific *** can be used for nuclear astrophysics,radiation physics,*** are four parts of it,they are superconducting ion source,high voltage platform and beam line,RFQ accelerator,and experimental *** control system is an important part of it,mainly used for gas intake control,moving electrode sputter control beam slits and bias voltage control.

摘要：HIMM是国产自主研发的医用加速器装置,作为目前最大的医学放疗装置,整个加速器控制系统的稳定性和可靠性要比工业系统有更高的要求。离子源针阀是离子源产生束流的重要组件,气体流量的大小和混合比直接影响源体真空度、电离效率、离子源稳定性等。本文针对HIMM离子源进气系统设计了基于三菱伺服电机和菲尼克斯PLC的控制系统,从系统结构、硬件设计、软件设计、数据分析等方面进行了介绍。为保证系统稳定性,加入伺服驱动器与相关真空度的硬连锁和远程开关功能。经过实际测试,该系统运行稳定,定位精度可达0.1°,满足设计要求。

摘要：According to the content of Ar^(39) in the sample to be tested,the age of the sample can be accurately *** method is used in the measurement of glacial age,the measurement of ancient fossils,*** the Ar39 ion source has been established to meet the requirement of ice age survey and fossil *** software of the Ar^(39) ion source control system is based on EPICS(Experimental Physics and Industrial Control System)*** mainly consists of two layers:IOC layer and an *** OPI layer also includes two layers:Channel Access(CA)client interface and application *** IOC layer includes six layers:Channel Access(CA)server interface,database access interface,dynamic database,record support module,device support module and device driver.

摘要：在HIMM医用重离子加速器(Heavy Ion Medical Machine)中,回旋加速器的连锁保护功能针对离子源、高频、真空、电源、冷却水等子系统的连锁要求,设计实现了设备+PLC+软件三层结构的连锁系统,并保证连锁功能在系统断电、线缆连接故障、数据传输异常等情况下的正常工作。连锁系统可实现硬连锁毫秒级、软连锁次秒级别的反应速度。整体功能在回旋调试过程中得到验证,保障了整个加速器的顺利供束。