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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

Preliminary results of optical emission spectroscopy by line ratio method in the RF negative ion source at ASIPP

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Plasma Science and Technology 2019年第4期21卷 155-160页

作者： Yan WANG Zhimin LIU Lizhen LIANG chundong hu Institute of Plasma Physics Chinese Academy of SciencesHefei 230031.People's Republic of China University of Science and Technology of China.Hefei 230026.People's Republic of China

Optical emission spectroscopy(OES)using the trace rare gases of Ar and Xe have been carried out in a radio frequency(RF)driven negative ion source at Institute of Plasma Physics,Chinese Academy of Science(ASIPP),in order to determine the electron temperature and density of the hydrogen *** line-ratio methods based on population models are applied to describe the radiation process of the excited state particles and establish their relations with the plasma *** spectral lines from the argon and xenon excited state atoms with the wavelength of 750.4 and 828.0 nm are used to calculate the electron temperature based on the corona *** argon ions emission lines with the wavelength of 480 and 488 nm are selected to calculate the electron density based on the collisional radiative *** has given the preliminary results of the electron temperature and density by varying the discharge gas pressure and RF *** to the experimental results,the typical plasma parameters isTe2≈2-4 eV and ne≈1 x 1017-8 x 1017 m^-3 in front of plasma grid.

关键词： optical emission spectroscopy neutral beam injection RF negative ion source

Theoretical analysis of some problems in the measurement of beam divergence angle for EAST neutral beam injector

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Theoretical analysis of some problems in the measurement of ...

Design of the reflection magnet and its shielding effect analysis for the neutral beam injector of EAST

第一届中国粒子加速器会议

作者： XU YongJian hu chundong Institute of Plasma Physics Chinese Academy of Sciences

Beam angular divergence is one of the indicators to evaluate the beam *** parameters of the beam extraction system could be adjusted to gain better beam quality following the measurement results,which will be helpful not only to study the transmission characteristics of the beam and the power distribution on the heat load components,but also to understand the real-time working condition of the ion source and beam extraction *** study includes:(1) the theoretical analysis of beam extraction pulse duration for measurement of beam angular divergence;(2) the theoretical analysis of beam intensity distribution during beam transmission for Experimental Advanced Superconducting Tokomak(EAST) neutral beam *** theoretical analyses could point the way to the measurement of beam divergence angle for EAST neutral beam injector.

关键词： neutral beam beam divergence angle beam intensity pulse duration

来源： cnki会议 cnki会议评论

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Nuclear Science and Techniques 2011年第2期22卷 70-76页

作者： LIANG Lizhen hu chundong XIE Yuanlai WEI Jianglong XIE Yahong LI Jun Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

In this paper,a reflection magnet to be installed in the EAST neutral beam injection system is simulated and *** field intensity of reflection magnet of 42-cm maximum bending radius is about 1.539×10-1 T for 100 keV deuterium *** shielding cage is formed by *** the ANSOFT software,the magnetic shielding effect was estimated at about 3% at the magnet pole region.

关键词：中性束注入系统屏蔽效果效果分析设计反射磁铁 Ansoft软件磁场强度

The development of data acquisition and processing application system for RF ion source

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Plasma Science and Technology 2017年第7期19卷 124-129页

作者： Xiaodan ZHANG Xiaoying WANG chundong hu Caichao JIANG Yahong XlE Yuanzhe ZHAO Qinghai University Xining 810016 People＇s Republic of China Institute of Plasma Physics Chinese Academy of Science Hefei 230031 People＇s Republic of China

As the key ion source component of nuclear fusion auxiliary heating devices, the radio frequency （RF） ion source is developed and applied gradually to offer a source plasma with the advantages of ease of control and high reliability. In addition, it easily achieves long-pulse steady-state operation. During the process of the development and testing of the RF ion source, a lot of original experimental data will be generated. Therefore, it is necessary to develop a stable and reliable computer data acquisition and processing application system for realizing the functions of data acquisition, storage, access, and real-time monitoring. In this paper, the development of a data acquisition and processing application system for the RF ion source is presented. The hardware platform is based on the PXI system and the software is programmed on the LabVIEW development environment. The key technologies that are used for the implementation of this software programming mainly include the long-pulse data acquisition technology, multi- threading processing technology, transmission control communication protocol, and the Lempel-Ziv-Oberhumer data compression algorithm. Now, this design has been tested and applied on the RF ion source. The test results show that it can work reliably and steadily. With the help of this design, the stable plasma discharge data of the RF ion source are collected, stored, accessed, and monitored in real-time. It is shown that it has a very practical application significance for the RF experiments.

关键词： RF ion source data acquisition data processing TCP LZO algorithm

The development of data acquisition and control system for extraction power supply of prototype RF ion source

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Plasma Science and Technology 2018年第8期20卷 104-111页

作者： Meichu huANG chundong hu Yuanzhe ZHAO Caichao JIANG Yahong XIE Shiyong CHEN Qinglong CUI Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China University of Science and Technology of China Hefei 230026 People's Republic of China)

A 16 kV/20 A power supply was developed for the extraction grid of prototype radio frequency（RF） ion source of neutral beam injector. To acquire the state signals of extraction grid power supply（EGPS） and control the operation of the EGPS, a data acquisition and control system has been developed. This system mainly consists of interlock protection circuit board, photoelectric conversion circuit, optical fibers, industrial compact peripheral component interconnect（CPCI） computer and host computer. The human machine interface of host computer delivers commands and data to program of the CPCI computer, as well as offers a convenient client for setting parameters and displaying EGPS status. The CPCI computer acquires the status of the power supply. The system can turn-off the EGPS quickly when the faults of EGPS occur. The system has been applied to the EGPS of prototype RF ion source. Test results show that the data acquisition and control system for the EGPS can meet the requirements of the operation of prototype RF ion source.

关键词： RF ion source data acquisition control system TCP/IP protocol beam extraction

Analysis of the Pipe Heat Loss of the Water Flow Calorimetry System in EAST Neutral Beam Injector

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Plasma Science and Technology 2016年第11期18卷 1139-1142页

作者： hu chundong CHEN Yu XU Yongjian YU Ling LI Xiang ZHANG Weitang NBI Group Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

Neutral beam injection heating is one of the main auxiliary heating methods in controllable nuclear fusion research. In the EAST neutral beam injector, a water flow calorimetry （WFC） system is applied to measure the heat load on the electrode system of the ion source and the heat loading components of the beamline. Due to the heat loss in the return water pipe, there are some measuring errors for the current WFC system. In this paper, the errors were measured experimentally and analyzed theoretically, which lay a basis for the exact calculation of beam power deposition distribution and neutralization efficiency.

关键词： water flow calorimetry power deposition neutral beam injection heat loss

Analysis of the characteristics of the plasma of an RF driven ion source for a neutral beam injector

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Plasma Science and Technology 2020年第2期22卷 109-114页

作者： Yongjian XU Li ZHANG chundong hu Yahong XIE Caichao JIANG Jianglong WEI Lizhen LIANG Yuanlai XIE Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Nuclear Power Institute of China Chengdu 10213People’s Republic of China

A radio frequency(RF)driven ion source is a very important component of a neutral beam injector for large magnetic confinement fusion *** order to study the key technology and physics of an RF driven ion source for a neutral beam injector in China,an RF ion source test facility was developed at the Institute of Plasma Physics,Chinese Academy of *** this paper,a two-dimensional fluid model is used to simulate the fundamental physical characteristics of RF plasma *** results show the relationship of the characteristics of plasma(such as electron density and electron temperature)and RF power and gas *** order to verify the effectiveness of the model,the characteristics of the plasma are investigated using a Langmuir *** this paper,experimental and simulation results are presented,and the possible reasons for the discrepancies between them are *** paper can help us understand the characteristics of RF plasma discharge,and give a basis for further R&D for an RF ion source.

关键词： RF ion source numerical simulation neutral beam injection inductive coupled plasma

First results of negative ion extraction with Cs for CRAFT prototype negative beam source

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Plasma Science and Technology 2021年第1期23卷 3-7页

作者： Yahong XIE chundong hu Jianglong WEI Yongjian XU Caichao JIANG Yuming GU Yuanzhe ZHAO Lizhen LIANG Yuanlai XIE Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China

In order to understand the physics and pre-study the engineering issues for radio frequency(RF)negative beam source,a prototype source with a single driver and three-electrode accelerator was ***,the beam source was tested on the RF source test facility with RF plasma generation,negative ion production and extraction.A magnetic filter system and a Cs injection system were employed to enhance the negative ion *** a result,a long pulse of 105 s negative ion beam with current density of 153 A m-2 was repeatedly extracted *** source pressure is 0.6 Pa and the ratio of co-extracted electron and negative ion current is *** details of design and experimental results of beam source were shown in this letter.

关键词： neutral beam injector RF ion source negative ion source long pulse Cs feeding