最新刊期
      卷 0 ， 期 0 ， 2020
      • HOU Xinggang GUXuenan HUYan ZHANG Jinfu LIU Andong
        Issue 12, (2007)
        摘要：Electron beam irradiation and ion implantation were used to improve photocataltsis efficiency of TiO2 films under visible light. NanomaterAg or Pt particles were formed on TiO2 films immerged in AgNO3 or H2PtCl6 solution and irradiated by 5 MeV E-beams. Other TiO2 films were implanted with 40 kV V+ or Cr+ ions. The films were characterized by scanning electron microscopy and depth profiling of the implanted species was determined by energy dispersive spectroscopy on cross section of the films. Higher photo catalytic efficiencies were found in the TiO2 films prepared by both the methods.  
        关键词：Ion implantation;Electron beam irradiation;TiO2;Visible light degradation   
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        发布时间：2021-03-12
      • SUN Iiangting LI Jinyu WANG Hui MA Baohua ZHANG Xuezhen SONG Mingtao LI Xixia ZHU Yuhua FENG Yucheng ZHAO Limin WANG Pingzhi MA Xinwen LIU Huiping ZHAO Hongwei
        Issue 12, (2007)
        摘要：The world biggest all permanent magnet Electron Cyclotron Resonance (ECR) ion source with the highest magnetic field has been successfully designed and fabricated at IMP, which is named LAPECR2 (Lanzhou All Permanent magnet ECR ion source No. 2). After being assembled, LAPECR2 source was situated on the 320 kV high voltage platform at IMP and connected to the successive ion beam transmission beam line. The first plasma of LAPECR2 was obtained in July 2005 with 14.5 GHz microwave power injection, and an intense mixing ion beam had also been extracted at the same time. Presently, the on-line test of the source LAPECR2 with the successive experimental beam line has been accomplished, and many kinds of intense high charge state ion beams have been detected at the experimental terminals. After a detail introduction of the ion source structure, the main characteristics are given. Then the preliminary results of the source at 14.5 GHz rf power injection are presented. After that, the on-line tuning results with the experimental beam line are presented and some corresponding discussion is also given. The aspects that affect the performances of the beam line are tentatively investigated in this paper.  
        关键词：ECR ion source;All-permanent magnet;High charge state;Space charge effect   
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        发布时间：2021-03-12
      • ZHANG Xu WANG Yaohui WU Xianying LI Qiang ZHANG Huixing ZHANG Xiaoji
        Issue 12, (2007)
        摘要：Titanium-containing diamond-like carbon films were deposited on silicon substrate by filtered cathodic vacuum arc (FCVA) technology, Effects of C2H2 flow rate and duct current on the composition and structures of the titanium-containing diamond like carbon films were studied. The results showed that the titanium-containing diamond like carbon films were composed of TiC and diamond like carbon structure. The C2H2 flow rate and duct current affected significantly on the composition and structures of the films. The Ti content in the films decreased, but the C content increased, with increasing C2H2 flow rate and duct current.  
        关键词：Filtered arc;Diamond like carbon;Duct current   
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        发布时间：2021-03-12
      • ZHAO Huanyu ZHAO Hongwei MA Xinwen SUN Uangting ZHANG Xuezhen
        Issue 12, (2007)
        摘要：Hot electron is a key issue for ECR ion sources. In order to study the dependence of hot electrons on external parameters of the ECR ion source, such as the RF power and the magnetic confinement configuration, bremsstrahlung spectra emitted by the SECRAL plasma axially were measured systematically. The spectral temperature Tspe, the index of hot electron energy, was obtained from the spectra, and influences of the source parameters on the Tspe were discussed.  
        关键词：SECRAL;Hot electrons;Bremsstrahlung spectra;Spectral temperature Tspe   
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        发布时间：2021-03-12
      • TANG Bin FAN Ailan QIN Lin TIAN Linhai
        Issue 12, (2007)
        摘要：Mo surface modified alloyed layer on Ti-6Al-4V alloy was obtained by using a plasma surface alloying technique. Structure and fretting wear behavior of the surface modified layer were characterized. Results show that the Mo surface modified layer with a pure Mo deposition and Mo diffusing layer significantly improves the wear resistance behavior of the treated Ti-6Al-4V alloy under oscillating sliding wear in ambient air.  
        关键词：titanium alloy;Surface alloy;Wear behavior   
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        发布时间：2021-03-12
      • WANG Langping WANG Xiaofeng TANG Baoyin
        Issue 12, (2007)
        摘要：Plasma immersion ion implantation and deposition (PIIID) has been developed rapidly in recent years, and commercial applications of the technique have been realized. A PIIID facility for commercial applications was developed in our lab. In this paper, the principle and functions of the commercial PIIID facility is discussed. Deposition rate of the pulsed cathodic arc plasma source in the PIIID facility is up to 2.9 (?)/s, and output voltage of the IGBT modulator is 10 kV. Industrial components in batches can be treated with the PIIID facility.  
        关键词：Plasma immersion ion implantation and deposition;commercial facility;function   
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        发布时间：2021-03-12
      • LIU Sheng HU Chun-dong
        Issue 12, (2007)
        摘要：This article analyzes the thickness of gas target, which is one of the factors to affect the neutralization efficiency of the neutral beam injection, and carries on the engineering design of the correlation parts of the diagnostic neutral beam injector on HT-7 Tokamak using the pressure analysis. A set of impulsive gas charge system is also established to realize accurate and real-time adjustment for the system pressure, and to optimize beam quality.  
        关键词：Neutralization efficiency;Gas target;Tokamak;Diagnostic neutral beam   
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        发布时间：2021-03-12
      • WANG Langping WANG Yuhang WANG Xiaofeng TANG Baoyin DONG Shen
        Issue 12, (2007)
        摘要：Because of their variety excellent properties, aluminum and titanium alloy are widely used in aerospace, airplane, ship manufacture, energy source and chemical engineering. However, both of them show a low wear resistance. In our research, plasma immersion ion implantation and deposition was utilized to improve their wear resistance. The method of ion implantation + transition layer deposition + wear resistance layer deposition was applied on these alloys. And by employing the wear testing method, the influences of the structure and thickness of the transition layer on wear resistance were obtained. The experimental results reveal that the wear resistance of these alloys can be improved significantly by optimizing the processing window.  
        关键词：Aluminum alloy;titanium alloy;Plasma immersion ion implantation and deposition;hybrid   
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        发布时间：2021-03-12
      • YU Guojun WANG Sen GONG Jinlong CAO Jianqing ZHU Dezhang
        Issue 12, (2007)
        摘要：An ion beam assisted method for large-area fabrication of nanodot arrays in anodic alumina oxide (AAO) templates was investigated. By this method, ordered arrays of Ni and Au nanodots with highly uniform diameters and density of 1.2×1010/cm2 were fabricated. The diameter and packing density of nanodots can be controlled by the cell parameters of AAO template. The fabrication method presented here can be extended to many other materials and allows further investigation of the size related characteristics in nanodot structures.  
        关键词：Ion beam;Nanodot array;Anodic alumina oxide template   
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        发布时间：2021-03-12
      • LIU Kexin ZHU Zheng GONG Linghua REN Xiaotang FU Dongpo JIANG Zhengyuan XIE Dalin LU Xiangchen WANG Zhongyi
        Issue 12, (2007)
        摘要：Recirculation gas stripper has the advantages of high beam acceptance, high gas density in stripper tube comparing with original gas stripper and less increase of beam emittance comparing with foil stripper. Recently a new recirculation gas stripper has been designed and manufactured for the EN tandem at Peking University. The structure, installation and performance of this stripper are described in this paper. Based on this improvement, the beam transmission of 10Be3+ has been increased from 5% to 11%, heavy ions with high charge state up to 17 have also been obtained for fabricating nano structure with ion track technology.  
        关键词：Recirculation gas stripper;Beam transmission;Gas pressure   
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        发布时间：2021-03-12
      • CUI Baoqun MA Yinjun LI Liqiang MA Ruigang JIANG Cong TANG Bing WANG Rongwen DENG Jinting JIANG Weisheng
        Issue 12, (2007)
        摘要：An RFQ injection system consisting of an ion source, two focusing lenses and a beam chopper, etc. was developed The proton beam with parameters of a=1.79, p=0.0596 mm /mrad, repetition rate f=1-100Hz, beam duty factor D=1%-100%, emittance less than 95.2 p mm mrad, beam energy E=75keV, and beam current 1=42 mA, can be produced to inject in to the RFQ.  
        关键词：RFQ;Ion source;Injection system   
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        发布时间：2021-03-12
      • ZHANG Guoping HU Liqun ZHANG Xianmei HUANG Juan
        Issue 12, (2007)
        摘要：In this work, attenuation of the injected diagnostic neutral beam in different electron temperatures, electron densities, and impurity concentrations of the target plasma in HT-7 tokamak was calculated by considering effects of the three basic atomic processes, i.e. ionization, recombination and charge-exchange. The results show that the attenuation depends strongly on the plasma density and beam energy, but the plasma temperature has less effect. The attenuation of the diagnostic neutral beam in the EAST plasma has been estimated based on the same principle, and the required parameters for the EAST diagnostic neutral beam are given as well.  
        关键词：Neutral beam;Attenuation;Plasma   
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        发布时间：2021-03-12
      • ZHANG Chunli ZHU Jiazheng QI Bujia YANG Yi CHENG Pinjing
        Issue 12, (2007)
        摘要：Three kinds of ion sources for the isotope separator on line in China Advanced Research Reactor is described in this paper. The ion sources, i.e. the high-temperature thermal ion source, arc discharge ion source and Penning ion source, have been developed for optimal ion beam of different radioactive isotopes. Temperature in the ionization chamber of the high-temperature thermal ion source can be up to 2400℃, which is well enough for high efficiency ionization of short-life radioactive rare-earth elements.  
        关键词：High-temperature thermal ion source;Arc discharge ion source;Penning ion source;Side extraction   
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        发布时间：2021-03-12
      • JIN Jie XU Zhiqian WANG Jinhui MING Jianchuan GUO Qiqian LI Liuhe
        Issue 12, (2007)
        摘要：The TiCN functional film was deposited on 4S# steel and Si substrates with ion beam assisted deposition and studied with SEM, Micro hardness test,WS-88 scratcher and Pin-on-disk tribometer.The adhesion was tested with WS-88 scratcher, the result shows that the structure has great influence on the film.The film was formed with multilayer, crystal and uncrystal. The experimental result proves that the film has good adhesion with substrate and low friction coefficient.  
        关键词：Ion beam assisted deposition;Crystalline;Multilayer films   
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        发布时间：2021-03-12
      • WANG Guangfu LU Yongfang ZHU Guanghua
        Issue 12, (2007)
        摘要：PIXE analysis of aerosol samples for measuring concentrations of elements with Z>12 is one of major applications at the GIC4117 Tandetron in Beijing Normal University. In order to measure H, C, N and O concentration in aerosol samples, proton non-Rutherford back scattering spectrometry (PNBS) and proton elastic scattering analysis(PESA) were employed with two Au(Si) surface barrier detectors at angles of 160°and 40°in the PIXE chamber.  
        关键词：Proton elastic scattering analysis(PESA);Proton Non-Rutherford back scattering PNBS);Aerosol;Light elements concentration   
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        发布时间：2021-03-12
      • CAI Xuemin LIU Tong TANG Huiqing ZHANG Kui ZHAO Jie
        Issue 12, (2007)
        摘要：TiN/Ag multilayers were deposited on medical stainless steel 317L by ion beam assisted deposition (IBAD). Standard agar dilution method was used to test antibacterial ratio using E.coil and S.aureus. Electro-chemical method was used to test corrosion resistance of the film in Hank’s simulated human plasma. The structure and depth profile of the elements were investigated by XPS, XRD and AES. The results show that a strong antibacterial ratio (>99%) can be obtained when the modulation period of TiN/Ag multilayers is 8 nm (5 nm TiN and 3 nm Ag). Its corrosion resistance is better than medical stainless steel 317L, approaching monolayer TiN.  
        关键词：Multilayers;Antibacterial property;Corrosion resistance   
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        发布时间：2021-03-12
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