最新刊期
      卷 0 ， 期 0 ， 2020
      • CHEN Maobai
        Issue S1, (2001)
        摘要：The development directions of AMS are discussed. The performance, specifications, merits and demerits of the SMCAMS facility, and comparison of real sample measurements between SMCAMS and others are introduced. The technical difficulties, technological innovations and innovating achievements in SMCAMS are summarized.  
        关键词：SMCMS;Minicyclotron;AMS   
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        发布时间：2021-03-12
      • Issue S1, (2001)
        摘要：<正>问世于70年代末的加速器质谱计（AMS）是一种基于加速器的超灵敏度质谱计。建立在加速器质谱计上的加速器质谱学（AMS）方法是加速器技术的一个正在迅速发展着的应用领域,是离子束分析的一门新技术。上海超灵敏小型回旋加速器质谱计（SMCAMS）是分析放射性核素14C的一台专用装置,建成后,它己成功地测试了马王堆、战国竹简等一批考古样品和近三  
          
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        发布时间：2021-03-12
      • CHEN Maobai
        Issue S1, (2001)
        摘要：The inherent technique characters, special design criteria, and new and original technological measures in SMCAMS are systematically expounded.  
        关键词：AMS;SMCAMS;Cyclotron   
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        发布时间：2021-03-12
      • CHEN Maobai
        Issue S1, (2001)
        摘要：Consideration of the structure of the accelerator system, magnet system and beam transport system in SMCAMS and foundation of their parameter determination are introduced. The choice of the various working modes are described.  
        关键词：Parameter determination;Working modes   
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        <引用本文> <批量引用> 7217534 false
        发布时间：2021-03-12
      • Li Deming
        Issue S1, (2001)
        摘要：The General physics design and beam orbit program of SMCAMS are presented. The analysing process of 14C particles are described.  
        关键词：Physics design;Beam orbit program;Analysis of 14C   
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        发布时间：2021-03-12
      • LU Xiangshun
        Issue S1, (2001)
        摘要：The influence of several and magnetic electric parameters of the mini-cyclotron have been studied, including the 1st,2nd,3rd harmonics of the magnetic field, the linearity of triangular wave voltage, the installing requirement of dee electrode, etc. It has been proved that the result of this study is very useful to the SMCAMS engineering project in determining the allowance during commissioning.  
          
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        发布时间：2021-03-12
      • LI Deming
        Issue S1, (2001)
        摘要：Micro-computer based control system and its software for carrying out the sequential acceleration on SMCAMS is described. Also, the establishment of the 14C particle measuring device and the improvement of the original power supply system are described.  
        关键词：Computer interface;Software;Measurement system   
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        <引用本文> <批量引用> 7217321 false
        发布时间：2021-03-12
      • Chen Maobai
        Issue S1, (2001)
        摘要：The various modes of the sequential acceleration on SMCAMS for precise measurement of 14C particle are introduced.  
        关键词：Sequential acceleration   
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        发布时间：2021-03-12
      • LU Xiangshun
        Issue S1, (2001)
        摘要：Analysis and improvement of the fractionation factors existing in ion source, injection system and acceleration process during experimental study of the sequential acceleration on SMCAMS are presented.  
        关键词：Fractionation effect   
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        发布时间：2021-03-12
      • Chen Maobai
        Issue S1, (2001)
        摘要：The further analysis and improvement of the fractionation factors existing in SMCAMS are summarized.  
        关键词：Fractionation factors;Emittance   
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        发布时间：2021-03-12
      • Chen Maobai
        Issue S1, (2001)
        摘要：The improvement for the original physics design and existing equipment in SMCAMS as well as its performance are summarized, during the last six years of process of adjustment and improvement to develop the established minicyclotron into a super-sensitive mass spectrometer.  
          
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        发布时间：2021-03-12
      • SEN Ligong
        Issue S1, (2001)
        摘要：Improvement of the original electronic apparatus in SMCAMS for implementing the sequential acceleration is described.  
        关键词：Power supply;Optic-fibre   
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        <引用本文> <批量引用> 7217331 false
        发布时间：2021-03-12
      • LU Xiangshun
        Issue S1, (2001)
        摘要：Analysis of X-ray induced causes and its suppression in SMCAM are discussed.  
        关键词：X ray   
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        发布时间：2021-03-12
      • LU Xiangshun
        Issue S1, (2001)
        摘要：The possibility of analysing other radio nuclei, such as 3H, 26A1, 40K, 44Ti, in SMCAMS is discussed.  
        关键词：Radio nuclei;Match   
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        发布时间：2021-03-12
      • CHEN Guosheng
        Issue S1, (2001)
        摘要：The basis of the mechanical design of the SMCAMS magnet, and the structure characters of the magnet and its coils are introduced. Finally, the engineering design of other parts, including deflectors, probes and accelerating electrodes are described.  
          
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        发布时间：2021-03-12
      • XUE Yanhe
        Issue S1, (2001)
        摘要：The manufacture technology of the SMCAMS magnet described. Based on the structure characters of symmetry in all directions, the pin hole series and the sectors with high precision are specially described in detail.  
        关键词：Magnet;Pin hole series with high precision;Sector   
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        发布时间：2021-03-12
      • LI Deming
        Issue S1, (2001)
        摘要：The computer application in measuring and non-electrically shaping of SMCAMS main magnetic field is described, including the magnetic field measuring control system, measured data post-procession, the magnetic field exciting system, and calculation and data dealing works for the non-electrically magnetic fild shaping  
        关键词：Measuring control system;Non-electrically shaping   
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        <引用本文> <批量引用> 7217356 false
        发布时间：2021-03-12
      • ZHANG Xilin
        Issue S1, (2001)
        摘要：The magnetic field measuring device is described in detail. The precision of measured SMCAMS magnetic field is analyzed. The process and its results of the non-electric shaping the magnetic field is introduced.  
        关键词：Magnetic field measurement;Precision of the measured magnetic field;Shaping of magnetic field   
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        发布时间：2021-03-12
      • GONG Peirong
        Issue S1, (2001)
        摘要：The principle of the R.F. ramp generator, the design of the block scheme of the ramp generator and the driven circuit, and the measurement of the technical rating of the tri-angular wave voltage are described in detail. Also, the structure of the Dee acceleration electrode is introduced.  
        关键词：Tri-angular wave voltage   
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        <引用本文> <批量引用> 7217514 false
        发布时间：2021-03-12
      • GONG Peirong
        Issue S1, (2001)
        摘要：Improvements of the ramp generator system for sequential acceleration and for decreasing the interference of R. F. to the precise power supply of the magnet are introduced.  
        关键词：Ramp generator;Interence of R. F.   
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        发布时间：2021-03-12
      • LI Deming
        Issue S1, (2001)
        摘要：The physics design of the SMCAMS injection system, including the scheme selection, beam transport calculation, particle orbit calculation and the engineering consideration, is described in detail.  
        关键词：Injection system;Beam transport   
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        发布时间：2021-03-12
      • XU Senlin
        Issue S1, (2001)
        摘要：Physics Design of the SMCAMS extraction system and beam transtport pipe line isdescribed in detail.  
        关键词：Extraction system;Beam spacing   
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        发布时间：2021-03-12
      • SAN Hekang
        Issue S1, (2001)
        摘要：Engineering design and mechanical manufacture of the SMCAMS beam transport system is simply described.  
        关键词：Beam transport system   
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        发布时间：2021-03-12
      • LIU Yonghao
        Issue S1, (2001)
        摘要：The problems of the original SMCAMS injection system is pointed,and an optimum design containing an analysing magnet between the injector and mini-cyclotron is calculated.  
        关键词：Optimum design   
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        发布时间：2021-03-12
      • CHEN Guosheng
        Issue S1, (2001)
        摘要：The design of the vertical multi-sample device with pushing-pulling type is described, including the structure characters, technical performance , equipment precision and working process.  
        关键词：Push-pull;Vertical;Multi-sample device   
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        发布时间：2021-03-12
      • CHEN Guosen
        Issue S1, (2001)
        摘要：The mechanical design of the structure of the vertical multi-sample device with rotating type is described, including the structure character, technical demands,  
        关键词：Rotating type;Vertical;Multi-sample   
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        发布时间：2021-03-12
      • JIA Wenhong
        Issue S1, (2001)
        摘要：The autocontrol system of the vertical rotatable multi-sample device in SMCAMS(Shanghai Minicyclotron AMS) will be described in this paper. The control framework is given and the control logic and flow upon it are introduced in detail. The testing result of the whole system is also presented. The muti-sample device together with this aotocontrol system has been put into the routine measurements on SMCAMS since last October.  
        关键词：SMCAMS;SCM;Pneumatic control valve   
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        发布时间：2021-03-12
      • ZHANG Yingji
        Issue S1, (2001)
        摘要：The development of the micro-channel plate detector for SMCAMS 14C measurement is described in detail. Also, the first 14C measurement is shown.  
        关键词：micro-channel plate;Detector   
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        发布时间：2021-03-12
      • LU Xiangahun
        Issue S1, (2001)
        摘要：Some measures to improve the performance and stability of the micro-channel plate based detector for SMCAMS is described in detail.  
        关键词：Single particle;micro-channel plate;Detector   
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        发布时间：2021-03-12
      • LI Deming
        Issue S1, (2001)
        摘要：A series of applications of computer technique in SMCAMS physics design and magnetic field measurement is described, including digital calculation of electric-magnetic field, beam dynamics, calculation of beam injection and extraction, and mapping and shaping of the magnetic field.  
        关键词：Beam dynamics;Digital calculation;Electric-magnetic field;Optics;Magnetic field mapping   
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        发布时间：2021-03-12
      • SHAO Yuhe
        Issue S1, (2001)
        摘要：It is mainly introduced in this article that the composition, structure, hardware and software designing, function, and the method of communication between the host computer and the ADAM modules of the distributed control system on Shanghai Mini-cyclotron Accelerator Mass Spectrometer (SMCAMS). Some detail problems such as controlling the devices staying on high voltage by ADAM-4541 (RS-485 to Fiber Optic Convertor) and optical fiber are also introduced.  
        关键词：Distributed control system;RS-485;Communication network;Optical fibre;Object oriented design   
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        发布时间：2021-03-12
      • ZHOU Weijian
        Issue S1, (2001)
        摘要：The sample preparation is a process required in AMS 14C dating. It is very important to choose appropriate chemical pretreatment for different sample. The carbon dioxide gases are produced by combusting pretreated organic samples with CuO in a sealed quartz tube. Graphite targets are prepared via the reduction of carbon dioxide over a Fe catalyst and a Zn reducer. The sample preparation have succeeded in a vacuum system mainly in order to reduce the amount of comtamination, work and time.  
          
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        发布时间：2021-03-12
      • Issue S1, (2001)
        摘要：The development of a high intensity Cs sputter negative ion source with multi-sample mechanism for AMS applications has been completed. In order to meet the particular requirements of AMS the source was specially designed with the emphasis on high output,low memory effect, low emittance as well as reliability and stability in structure and performance. The source prototype has been tested intensively on the test stand for more than one year. During the period some important modifications were made. 10μA Be0-, 5/μA Al-, 4. 5μA Fe-, 350μA C- etc. have been delivered. The emittance was measured to be very good and ranges from 2 to 4πmm, mrad. MeV1/2 for beams less than 100μA The memory effect and ioniza-tion efficiency have also been measured or evaluated. The first two source prototypes will be moved to the EN tandem at Peking University, Beijing, and the 6 MV home-made tandem in Sanghai Institute of Nadoar Research for 14C and 10Be measurements respectively.  
        关键词：AMS;Negative ion source;Sputter   
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        发布时间：2021-03-12
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