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ion source for HL-2A Nuetral Beam Injection

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Chinese Physics C 2008年第Z1期32卷 271-273页

作者：雷光玖姜韶风钟光武曹建勇卢大伦邹桂清刘鹤张贤明江涛杨继芳钱家湄唐立新周才品毛维成刘永核工业西南物理研究院成都610041

An ion source for HL-2A Neutral Beam Injection(NBI)was operated successfully in March 2007,in South- western Institute of Physics.A bucket source type and three-grid-system are used in this new ion source *** filament current of ll00A,filament voltage of 12V,arc current of 1050A,arc voltage of 120V,highest plasmas density of 2.5×10^(12)/cm^3,extracted ion beam density of 0.44A/cm^2,plasma density uniformity better than 5% in the area close to the first grid,duration of 2s,for this new source,have been *** conceptual design,mechanical design and experiment result for the ion source are presented briefly in this paper.

关键词： ion source neutral beam injection plasma heating

Diagnosing the Fine Structure of Electron Energy Within the ECRIT ion source

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Plasma Science and Technology 2016年第7期18卷 744-750页

作者：金逸舟杨涓汤明杰罗立涛冯冰冰 College of Astronautics Northwestern Polytechnic University

The ion source of the electron cyclotron resonance ion thruster （ECRIT） extracts ions from its ECR plasma to generate thrust, and has the property of low gas consumption （2 seem, standard-state cubic centimeter per minute） and high durability. Due to the indispensable effects of the primary electron in gas discharge, it is important to experimentally clarify the electron energy structure within the ion source of the ECRIT through analyzing the electron energy distribution function （EEDF） of the plasma inside the thruster. In this article the Langmuir probe diagnosing method was used to diagnose the EEDF, from which the effective electron temperature, plasma density and the electron energy probability function （EEPF） were deduced. The experimental results show that the magnetic field influences the curves of EEDF and EEPF and make the effective plasma parameter nonuniform. The diagnosed electron temperature and density from sample points increased from 4 eV/2 ×10^16 m-3 to 10 eV/4×10^16 m-3 with increasing distances from both the axis and the screen grid of the ion source. Electron temperature and density peaking near the wall coincided with the discharge process. However, a double Maxwellian electron distribution was unexpectedly observed at the position near the axis of the ion source and about 30 mm from the screen grid. Besides, the double Maxwellian electron distribution was more likely to emerge at high power and a low gas flow rate. These phenomena were believed to relate to the arrangements of the gas inlets and the magnetic field where the double Maxwellian electron distribution exits. The results of this research may enhance the understanding of the plasma generation process in the ion source of this type and help to improve its performance.

关键词： ion source plasma diagnostic electron energy distribution function

R&D progress of high power ion source on EAST-NBI

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Plasma Science and Technology 2018年第1期20卷 158-161页

作者：谢亚红胡纯栋刘胜谢远来许永建梁立振蒋才超盛鹏顾玉明李军刘智民 Institute of Plasma Physics Chinese Academy of Sciences

The neutral beam injector （NBI） system was designed and developed mainly for the plasma heating on the Experimental Advanced Superconducting Tokamak （EAST）. The high power ion source is the key part of the NBI. A hot cathode ion source was used on the EAST-NBI. The ion source was conditioned on the ion source test bed with hydrogen gas and achieved the designed parameters. The deuterium gas was used when it moved to the EAST-NBI. The main performance of the ion source on EAST is presented in this paper. The highest beam power of 4.5 MW in NBI-1 and 2.75 MW in NBI-2 was achieved. The total neutral beam power is about 4.5 MW. The long pulse beam of 100 s is injected into the EAST plasma too.

关键词： ion source neutral beam injector EAST toakmak

Negative Corona Discharge ion source Under Ambient Conditions with Mini Line-cylinder Electrodes

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Chinese Journal of Chemical Physics 2009年第1期22卷 107-112页

作者： Kun Liu Fei Tang Xiao-hao Wang Liang Zhang Xue-ye Wei School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 China

A novel ambient negative corona discharge ion source with mini line-cylinder electrodes is designed. The diameters of inner and outer electrode are 0.16 and 4 mm respectively. With a special assembly method, a perfect coaxiality of the two electrodes is obtained. An injection system utilizing a temperature control technique, achieves a constant and stable concentration of the sample, which is critical to the experiment. The formulas of the corona onset voltage of line-cylinder electrodes are also introduced. The experiment results show that negative substances such as formic acid and acetic acid can be ionized under ambient conditions. When combined with micro electrical mechanical system fabricationprocess, the volume of the ion source can be reduced dramatically, but there is an undesirable surface discharge. To solve the surface discharge problem, an improved structure was designed and tested. The simplicity of the interface of the ion source makes it suitable for mass spectrometer, micro mass spectrometer, ion mobility spectrometer, and high-field asymmetric waveform ion mobility spectrometer applications.

关键词： Line-cylinder corona discharge ion source Surface discharge Ambient mass spectrometry Micro electrical mechanical system

Analysis of Magnetic Field of the DNB ion source

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Plasma Science and Technology 2008年第4期10卷 522-524页

作者：谢亚红胡纯栋刘胜刘智民王绍虎 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

A distribution of the magnetic field produced by permanent magnets in the DNB ion source is calculated and analyzed in order to understand the plasma confinement in a cusped magnetic field and optimize plasma discharg... 详细信息

关键词： ion source cusped magnetic field confined configuration plasma

The Development of a Megawatt-Level High Current ion source

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Plasma Science and Technology 2012年第1期14卷 75-77页

作者： HU Chundong XIE Yahong NBI team NBI team Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

Neutral beam injection is one of the main plasma heating methods in nuclear fusion devices. In order to support the scientific study of the Experimental Advanced Superconducting Tokamak （EAST）, a megawatt-level high current ion source is designed and manufactured in the ASIPP, and the progress and preliminary test results will be presented in this paper.

关键词： NBI ion source megawatt high current

Performance of a New ion source for KSTAR Tokamak Plasma Heating

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Plasma Science and Technology 2014年第6期16卷 620-624页

作者： Tae-Seong KIM Seung Ho JEONG Doo Hee CHANG Kwang Won LEE Sang-Ryul IN Korea Atomic Energy Research Institute

In the experimental campaign of 2010 and 2011 on KSTAR, the NBI-1 system was equipped with one prototype ion source and operated successfully, providing a neutral beam power of 0.7-1.6 MW to the tokamak plasma. The new ion source planned for the 2012 KSTAR campaign had a much more advanced performance compared with the previous one. The target performance of the new ion source was to provide a neutral deuterium beam of 2 MW to the tokamak plasma. The ion source was newly designed, fabricated, and assembled in 2011. The new ion source was then conditioned up to 64 A/100 keV over a 2-hour beam extraction and performance tested at the NB test stand （NBTS） at the Korea Atomic Energy Research Institute （KAERI） in 2012. The measured optimum perveance at which the beam divergence is a minimum was about 2.5μP, and the minimum beam divergent angle was under 1.0° at 60 keV. These results indicate that the 2.0 MW neutral beam power at 100 keV required for the heating of plasma in KSTAR can be delivered by the installation of the new ion source in the KSTAR NBI-1 system.

关键词： NBI ion source KSTAR neutral beam plasma heating positive based ion

Optimization of Experimental Discharge Parameters to Increase the Arc Efficiency of the Bucket ion source

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Chinese Physics Letters 2010年第5期27卷 72-75页

作者：于利明雷光玖曹建勇钟光武姜韶风邹桂清江涛卢大伦张贤明刘鹤 Southwestern Institute of Physics Chengdu 610041

Arc efficiency is a critical criterion for assessing the performance of the ion source. High are efficiency is necessary for a high power ion source, because it can decrease the load of the arc power supply. Thus the relationship between the discharge parameters （gas pressure, arc voltage, filament current, bias resistance connecting between the anode and plasma grid） and the arc efficiency is investigated in experiment especially. It is found that with increasing pressure, the arc efficiency increases fast if the pressure is below 0.4 Pa, but when it is above 0.4 Pa, the arc efficiency remains unchanged or increases slowly. If we increase the arc voltage or filament current, the arc efficiency decreases. The bias resistance also influences the arc efficiency, at the same pressure the arc efficiency increases with resistance.

关键词： arc efficiency bias efficiency ion source

Using Adaptive Discrete-Time Gas Supply Control for Long Pulse Arc Discharge of ion source on NBI

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Plasma Science and Technology 2008年第5期10卷 635-639页

作者：盛鹏胡纯栋宋士花刘胜刘智民 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

A control model of gas supply system is introduced for ion source and an adaptive discrete-time control algorithm to regulate the hydrogen injection. A real-time feedback control system （RFCS） is designed to control the gas supply for ion source based on the control model and the discrete-time control algorithm. The experimental results have proved that RFCS could regulate the gas supply smoothly, suppress the arc＇s abrupt over-current at the end of the ion source discharging, prolong the discharge pulse and stabilize the ion concentration. With RFCS, the ion source for neutral beam injection has reached its longest pulse with a length of 4.5 seconds in a stable status.

关键词： adaptive discrete-time control real-time feedback control ion source neutral beam injection