A magnetic mass spectrograph has been developed for measuring the ion composition of pulsed vacuum arc ion sources at 60 kV extraction voltage. The mass spectrograph is comprised of an ion beam collimator, an einzel lens, a 114 degrees dipole magnet, and a 416-channel Faraday-strip array detector. The main advantages of this mass spectrograph are its high simultaneous mass-to-charge ratio detection range and gapless Faraday-strip array detector. This paper introduces the design of the mass spectrograph and evaluates its performance in terms of resolving power and simultaneous detection range.

针对兰州重离子研究装置(HIRFL)电源系统快速恢复数据的需求,设计了基于MASAR的数据快照和数据恢复系统.当束流被调至一个最优状态时,通过使用该系统,物理调束人员可以在客户端界面上进行数据快照来保存此刻电源的最优参数数据,并且之后可以选择此时保存好的快照数据将束流恢复至原先调好的最优状态,实现电源最优参数数据的快速恢复.运行结果表明,该系统满足设计要求,缩短了装置的调束时间,提高了调束效率.

重大科技基础设施是为探索未知世界、发现自然规律、实现技术变革提供极限研究手段的大型复杂科学研究系统,是突破科学前沿,解决经济社会发展和国家安全重大科技问题的物质技术基础.《国家重大科技基础设施建设中长期规划(2012-2030年)》明确提出,瞄准科技前沿研究和国家重大战略需求,根据重大科技基础设施发展的国际趋势和国内基础,总体部署16项重大科技基础设施建设项目.强流重离子加速器装置(high intensity heavy-ion accelerator facility,HIAF)作为核物理科学领域的重要部署被列为建设重点项目之一,并于2018年12月底在广东惠州正式启动建设.图1为HIAF装置效果图.

电源监测系统为兰州重离子加速器装置(HIRFL)机器研究、自动调束、深度学习提供重要的实时数据,在对HIRFL进行EPICS升级过程中,重新设计电源监测系统,采用分布式的设计布局,形成一种由上层、中间件、底层构成的拓展架构,实现上层数据的中间件处理、下层参数的中间件统一下发,避免上层非法参数对下层设备的不利影响,简化下层异常的处理;为了调束方便,整合显示界面,优化不同功能界面上大数据量显示的难题,提高显示的流畅度;为了完成数据的后台分析,搭建非关系型数据库集群,实现重要数据多副本、实时数据分片多节点存储,提高数据安全性及数据库读写速度,避免复杂的数据库表结构设置,拓展数据库集群优化及节点增加.

In order to reduce the difficulty of the tuning work and improve transmission efficiency at the 320-kV heavy ion multidisciplinary research facility (IMRF), an online optimization system was developed. In this paper, the difficulties of manual tuning are analyzed amply. Various optimization-based approaches were considered and a Bayesian optimization method was selected and implemented in hardware. We have applied the online optimization system at the beamline to increase transmission efficiency. The transmission efficiency obtained by this online tuning system can reach 50%, which is better than the manual tuning 30% to 35%. The general work developed in this paper can provide a reference for the design and implementation of online tuning approaches for various complex systems, not just accelerator facilities.

本文对320 kV全离子综合实验平台的控制系统升级进行了研究.升级后的控制系统采用分布式系统模型构建.硬件采用串口服务器 、PLC及伺服电机等部件实现了所有被控设备的远程监测及控制.软件通过建立EPICS IOC动态数据库,实现了对所有被控设备的集成.用户操作界面层采用CSS开发,实现了操作人员对所有被控设备的透明访问.该控制系统已成功连续运行约10000 h.目前该控制系统运行稳定 、可靠,完全满足320 kV全离子综合实验平台的运行及物理实验的需求.

为测量兰州重离子加速器冷却储存环主环(CSRm)束流累积阶段的闭轨畸变并进行闭轨校正,开发了闭轨校正系统,该系统由轨道测量系统、闭轨控制系统和校正磁铁系统构成.轨道测量系统实现对束流轨道的实时监测;闭轨控制系统读取束流轨道信息,然后进行闭轨校正计算,并将计算后的校正值传输给校正磁铁系统;校正磁铁系统通过改变校正电源的值,改变校正磁铁的强度,实现对束流轨道的调整,完成闭轨校正.模拟测试结果表明,束流轨道水平方向的最大畸变由校正前的3.37 mm减小为校正后的0.39 mm,垂直方向的最大畸变由校正前的4.21 mm减小为校正后的0.31 mm.该系统能够实现响应矩阵的自动测量和束流轨道的自动校正,满足设计要求.

FECR ion source is replaced with LAPECR ion source temporarily for other components performance testing in LEAF. LAPECR ion source can afford intense low charge state or medium charge state ion beams. This paper introduces the control system which comprises software, hardware and the interlock system. The control system is based on EPICS and the device supports are developed in Linux. CSS is utilized as the Operator Interface. Commercial controllers and PLCs are adopted to control devices, acquire experimental data and create interlock system. At present, LAPECR ion source has provided beam (150 μA, 4H1+, 0.5Mev) for RFQ outlet. This control system can work stable and interlock system can effectively protect equipment from damage.

Control system of HIRFL-CSR accelerator is now upgrading to new architecture based on Experimental Physics and Industrial Control System (EPICS), a control sub-system of High Voltage (HV) for slow extraction on CSRm must be redesigned with the new architecture. The hardware of the new system based on a high-performance FPGA controller. Researched on embedded EPICS technology and implemented core function of the sub-system based on the technology. This paper describes the design and implementation of the new control system.

The principle of magnetic mass spectrometer is briefly introduced.According to types of equipment included in the magnetic mass spectrometer,a two-layer structure of control system based on Ethernet is designed.The basic functions of re-mote adjustment and monitor of parameters and interlock protection are realized.A set of trigger system is designed for a continu-ously adjustable delay time of 0~20 μs.Through the test,the system has obtained the spectral graph which satisfies the physical experiment requirements.After dozens of hours of experimental test,the system is stable and operable,which satisfactorily meets the user's experimental needs.

The newly built SECRAL II (Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou II) is a multi-purpose intense highly charged ion source and is of great significance at Institute of Modern Physics (IMP). The control system is an important subsystem of SECRAL II. In this paper, we implement a control system for SECRAL II. In order to achieve high quality control, we have presented and followed some useful control concepts. The control system can perform control and monitor of all devices. Besides, it can also complete data store, alarms, interlocks and human safety. In all, the control system effectively supports the operation for SECRAL II. The control system was completed and put into operation in June 2016. The control system has successfully worked for about 11000 hours. During this process, the hardware works normally and without trouble. The control software has a low failure rate (5.5×10-4/hour) and its MTTR (Mean Time to Repair) is less than 30 minutes. Since then, SECRAL II has set many world records in the field of ECR ion source.

For HIRFL's beam profile monitor system,a new system based on video acquisition and decoding of Windows platform was designed.In order to calculate beam parameter,a flow chart of image processing which could recognize beam spot was devised on account of open computer vision library,As a result,it solves the problem that the original system couldn't analyze beam spot in real time.The new system can get video stream stability,possess high recognition accuracy of beam spot and compute beam parameter accurately and fast,thus improving the efficiency of beam commissioning.

Background: Data archiving system is an important part of SECRAL-Ⅱ (Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou-Ⅱ, SECRAL-Ⅱ) control system which is based on the Experimental Physics and Industrial Control System (EPICS). The SECRAL-II researchers have special request for data archiving system, but the Channel Archiver of EPICS cannot satisfy their requirements.Purpose: This study aims to develop a novel data archive system to meet user's special requirements.Methods: EpicsSharp, a software library for the NET platform, is employed to implement the channel access protocol of EPICS. Based on C# language and Oracle database, EPICS Client library combined with Microsoft.Excel 14.0 object library are used to implement a novel data archive system which can read EPICS process variable (PV) values and save them into files in Excel format. Corresponding file management system based on hypertext preprocessor (PHP) is developed for user convenience and the safety of the file system.Results: The data system is stable and reliable and has been running in practice for half a year. Through the web browser, user can login into the file manager system and select any file to download to the local computer. Then the data file can be viewed or imported into another analysis system. Conclusion:The archive system is reliable and suitable for SECRAL-II control system. This scheme is applicable to the similar requirements of other control system.

Fluorite (F)–pyrochlore (P)–fluorite (F) phase transitions of Gd2Zr2O7 were investigated from 573 K to 1873 K (300 °C to 1600 °C), by means of X-ray diffraction, infrared spectra (IR), and Raman spectra. The low-temperature F phase can stably exist below 1523 K (1250 °C) and the F–P transition occurs at 1523 K to 1573 K (1250 °C to 1300 °C). The ordering process of P phase forms at 1573 K to 1773 K (1300 °C to 1500 °C) and the ordering degree increases with increasing sintering temperature and heat preservation period. High-temperature phase transition from P to F occurs between 1773 K and 1823 K (1300 °C and 1550 °C). IR spectra of samples with different ordering degrees show an interesting shift at 510 cm−1. Raman spectra show that only the A1g mode displays a significant change between F and P phases. This ordering degree and phase transition temperature studies would allow a more targeted experimental optimization of Gd2Zr2O7 to use in nuclear waste host, thermal barrier coatings, and solid oxide fuel cells.

An integrated monitoring system of power supply in the CSRm is designed to reconstruct the original monitoring system.The system is based on the LabVIEW software platform and uses the PXI-6133 multi-function data acquisition card of NI.The C/S mode is adopted to build the system.The programs in the front-end servers acquire data from the power supply and process the data.The processed data will be transmitted to the client with the DataSocket Transmit Protocol.The programs in the client can set the parameters of the power supplies and receive,display the data.According to the test results,the system is a stable and reliable system with a simple,flexible and manageable operation interface and it has fulfilled the requirements of con-trolling beam of CSRm.

In this paper, we present direct mass measurements of neutron-rich86 Kr projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing the Isochronous Mass Spectrometry(IMS) method. The new mass excesses of52-54 Sc nuclides are determined to be-40492(82),-38928(114),-34654(540) ke V, which show a significant increase of binding energy compared to the reported ones in the Atomic Mass Evaluation 2012(AME12).In particular,53 Sc and54Sc are more bound by 0.8 Me V and 1.0 Me V, respectively. The behavior of the two neutron separation energy with neutron numbers indicates a strong sub-shell closure at neutron number N =32 in Sc isotopes.

This article gives a brief description of the power supply control system for Cooler Storage Ring (CSR). It introduces in detail mainly of the control system architecture, hardware and software. We use standard distributed control system (DCS) architecture. The software is the standard three-layer structure. OPI layer realizes data generation and monitoring. The intermediate layer is a data processing and transmission. Device control layer performs data output of the power supply. We use ARM + DSP controller designed by ourselves for controlling the power supply output. At the same time, we have adopted the FPGA controller designed for timing for power supply control in order to meet the requirements of accelerator synchronizes the output of the power supply.

The concept of isochronous mass spectrometry (IMS) applying two time-of-flight (TOF) detectors originated many years ago at GSI. However, the corresponding method for data analysis has never been discussed in detail. Recently, two TOF detectors have been installed at CSRe and the new working mode of the ring is under test. In this paper, a data analysis method for this mode is introduced and tested with a series of simulations. The results show that the new IMS method can significantly improve mass resolving power via the additional velocity information of stored ions. This improvement is especially important for nuclides with Lorentz factor γ-value far away from the transition point γ _t of the storage ring CSRe.