最新刊期
      卷 0 ， 期 0 ， 2020
      • Guan Xialing Qin Jiuchang Yang Bingfan Zhang Canzhe Du Xueren Yu Yunfeng Ge Jiyun
        Issue 6, (1992)
        摘要：Since CIAE- HI13 tandem accelerator was accepted in 1987, the accelerator has been in operation for more than four years. In this period, the beam time on the targets of this machine has accumulated for 13000 hours. In this paper the work status of the machine in the last four years has been mentioned. The accelerator was conditioning as high as 13.4 MV terminal voltage with the highest voltage for experiments at 12.6 MV and the lowest voltage at 2.08 MV More than 20 of various ion species were accelerated through the tandem machine. The people who worked in the field of the operation and maintenance of the tandem have accumulated some important experience, such as the assembly, installation and adjustment of the Laddertron chain, the high voltage conditioning, the government of the stabilization system and the control system. Some troubles encountered in the last four years have been smoothed over. Up to now, the machine is quite satisfactory.  
          
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        发布时间：2021-04-09
      • Qin Jiuchang Gaun Xialing Yang Bingfan Zhang Canzhen Du Xueren Yu Yunfeng Ge Jiyun Yang Weimin
        Issue 6, (1992)
        摘要：Improvements on the HI-13 tandem accelerator which have been made since 1986 are summarized. Modifications and home made components for the injector, the vacuum system, the foil stripper system, the laddertron charging system and beam lines are described.  
        关键词：Tandem accelerator   
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        发布时间：2021-04-09
      • Yu Jinxiang Li Renxing Gong Linghua Zhang ZhengfangJin Ruixin Zhang Guijun Shen Yisong Ren XiaotangWang Zhaojiang Zhao Yin Yang Xiangjun
        Issue 6, (1992)
        摘要：The operation and some improvements of the EN-18 tandem transferred from Oxford University were described. Up to now the terminal voltage has already reached 6 MV, voltage stability better than 2 kV. Four beam lines have been constructed and some experiments were made. The vacuum of main body of the EN-tandem has been improved by a simple way. Some parts of the main body are replaced by China made ones. The control system of the EN-tandem are renewed and modernized partly.  
          
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        发布时间：2021-04-09
      • Zhang Zhongmu Lai Weiquan Jiao Shouhua Si Houzhi
        Issue 6, (1992)
        摘要：The alterations of the beam optical path, installation and alignment problems of the beam optical components and high voltage test of the 6 MV tandem accelerator which has been developed in Shanghai Institute of Nuclear Research are described more detailly in this paper. The reasons of breakdown accidents of the laddertron and the multi-layer bellows are analysed. Appropriate measure’s have been taken.  
          
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        发布时间：2021-04-09
      • Issue 6, (1992)
        摘要：This paper introduces the six-year’s experiences of operation and improvement of the NEC-made 4UH pelletron accelerator which has been in operation for 104h.  
          
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        发布时间：2021-04-09
      • Lu Chengrong Sun Chuanchen
        Issue 6, (1992)
        摘要：During the past four years the 9SDH-2 pelletron at Fudan has been operated well. This paper will briefly describe the status of the machine including some troubleshooting.  
          
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        发布时间：2021-04-09
      • Shen Dingyu Wang Xuemei Li Shuozhong
        Issue 6, (1992)
        摘要：This paper introduces the experimental study about the charge loss appeared twice on the high voltage terminal of the tandem accelerator. The reasons causing the charge loss and the leakage paths are discussed.  
          
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        发布时间：2021-04-09
      • Zhou Junsi Xu Tianbing Zhu Peiran Qiu Changqing Zheng Zongshuang Jiang Weilin Ren Wengmei
        Issue 6, (1992)
        摘要：A 2×1.7MV tandem accelerator has been used for 8 years in the Institute of Physics. By using a self-made PIG ion source and a 860 type sputter negative ion source, more than 30 ion species with varous charge states have been utilized. Since 1983, many techniques and methods have been developed, including PIXE, NRA, RBS, Channeling, ERD, MeV implantation, microanalysis, and their related beam lines, target chambers, data acquisition and processing system etc. This multifunctional system has supported more than 100 projects for 26 Universities and 20 Institutes. The machine has been run for more than 16000 working hours.  
          
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        发布时间：2021-04-09
      • Wang Wenxun Jiao Guiyue Wang Guangpu Dong Ping
        Issue 6, (1992)
        摘要：This article introduces the operation and improvement of model 4117 tandetron, including the home-made ionizer for model 860 ion source and the work of high energy implantation since 1988.  
          
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        发布时间：2021-04-09
      • Ion Beam Iab. Institute of Materials Science
        Issue 6, (1992)
        摘要：The operation and maintenance of the 3 SDH tandem at Tsinghua University are described.  
          
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        发布时间：2021-04-09
      • Si Houzhi Zhang Weizhong Zhu Jinhua Du Guangtian Zhang Tiaorong Gao Xiang
        Issue 6, (1992)
        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 BeO-, 5μAAl-, 4.5M 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 ionization 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 our Institute for 14C and 10Be measurements respectively.  
          
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        发布时间：2021-04-09
      • Sun Chuanchen He MianhongFudan University. Shanghai 200433
        Issue 6, (1992)
        摘要：An improvement both on shape and on size of the insert, a part of the alpha-tross He ion source made by NEC in USA, reduces greatly the possibility of a kind of trouble, which took place very often in this source, that is the migration of Rb toward canal and BN insulator. As a result, the lifetime becomes much longer than before. Recently it has been running for 350h without any problems.  
          
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        发布时间：2021-04-09
      • Wang Xuemei Shen Dingyu Li Shuozhong
        Issue 6, (1992)
        摘要：Efforts have been made to improve the lifetime of the charge exchange RF ion source made by National Electrostatics Corp. USA. A cooling flange was inserted between the rubidium vapor chamber and the ion source body, as a result the source lifetime was prolonged obviously.  
          
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        发布时间：2021-04-09
      • Zhou Junsi Qiu Changqing Xu Tiaabing Yang Guolaing
        Issue 6, (1992)
        摘要：A modified sputter negative ion source has been developed in Ion Beam Lab., Institute of Physics, the ionizer of which is described in detail. 780μA C- and 250μA of Si- have been obtained. The lifetime of the ionizer is longer than 3000 h.  
          
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        发布时间：2021-04-09
      • Yan Shengqing
        Issue 6, (1992)
        摘要：Some of the most recent developments at NEC are presented. They are: the high current pelletron systems; a variety of small machines for different special purpose; some of the improvements on the accelerating tube and the terminal potential stabilizer; the large horizontal pelletron 8UDH; the electron cooling technique.  
          
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        发布时间：2021-04-09
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