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Conceptual Design of Neutral Beam Injection System for EAST 被引量:18
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作者 胡纯栋 NBI Team 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第6期567-572,共6页
Neutral beam injection (NBI) system with two neutral beam injections will be con- structed on the Experimental Advanced Superconducting Tokamak (EAST) in two stages for high power auxiliary plasmas heating and non... Neutral beam injection (NBI) system with two neutral beam injections will be con- structed on the Experimental Advanced Superconducting Tokamak (EAST) in two stages for high power auxiliary plasmas heating and non-inductive current drive. Each NBI can deliver 2-4 MW beam power with 50-80 keV beam energy in 10-100 s pulse length. Each elements of the NBI system are presented in this contribution. 展开更多
关键词 neutral beam injection system TOKAMAK EAST auxiliary heating
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Calculation of Beam Intensity Distribution for the Neutral Beam Injection in EAST 被引量:7
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作者 梁立振 胡纯栋 +2 位作者 谢远来 郭强 谢亚红 《Plasma Science and Technology》 SCIE EI CAS CSCD 2011年第4期502-505,共4页
Theoretical beam intensity distribution is derived for the neutral-beam-injection ion source with a multi-slot extraction in EAST. The beam intensity profile, both along and perpendicular to the injecting direction an... Theoretical beam intensity distribution is derived for the neutral-beam-injection ion source with a multi-slot extraction in EAST. The beam intensity profile, both along and perpendicular to the injecting direction and the beam power deposition to the inner elements in the neutral beam injector (NBI) are evaluated. The results indicate that the transverse beam intensity is much higher than the longitudinal one. This study could provide information for the design of vacuum system, structure of inner elements and cooling system of the neutral beam injector in EAST. 展开更多
关键词 neutral beam injection beam intensity profile multi-slots extraction system
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Empirical Scaling Laws of Neutral Beam Injection Power in HL-2A Tokamak 被引量:3
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作者 曹建勇 魏会领 +11 位作者 刘鹤 杨宪福 邹桂清 于利明 李青 罗翠文 潘宇东 姜韶风 雷光玖 李波 饶军 段旭如 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第5期43-46,共4页
We present an experimental method to obtain neutral beam injection (NBI) power scaling laws with operating parameters of the NBI system on HL-2A, including the beam divergence angle, the beam power transmission effi... We present an experimental method to obtain neutral beam injection (NBI) power scaling laws with operating parameters of the NBI system on HL-2A, including the beam divergence angle, the beam power transmission efficiency, the neutralization efficiency and so on. With the empirical scaling laws, the estimating power can be obtained in every shot of experiment on time, therefore the important parameters such as the energy confinement time can be obtained precisely. The simulation results by the tokamak simulation code (TSC) show that the evolution of the plasma parameters is in good agreement with the experimental results by using the NBI power from the empirical scaling law. 展开更多
关键词 In Empirical Scaling Laws of neutral beam injection Power in HL-2A Tokamak HL
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Analysis on Pressure Distribution in HT-7 Neutral Beam Injection System 被引量:2
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作者 朱武 陈联 +1 位作者 胡纯栋 胡立群 《Plasma Science and Technology》 SCIE EI CAS CSCD 2005年第2期2719-2722,共4页
Neutral Beam Injection (NBI) is an effective way to improve the efficiency of toka mak heating system. This article primarily introduces a work on the pressure distribution inside the tank of NBI heating system, espec... Neutral Beam Injection (NBI) is an effective way to improve the efficiency of toka mak heating system. This article primarily introduces a work on the pressure distribution inside the tank of NBI heating system, especially inside the neutralizer, which is got by selecting a proper mathematical model and constructing a series of rational calculating formulas on pressure distribution. Furthermore, we simulate the pressure distribution by the Monte Carlo method. Comparing the result of simulation with that of theoretical calculation, we find that both the results are very close each other, showing their mutual validity. 展开更多
关键词 neutral beam injection vacuum calculation Monte Carlo simulation
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Control System of Neutral Beam Injection on HT-7 被引量:1
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作者 汪永军 胡纯栋 +3 位作者 刘智民 刘胜 宋士花 杨道业 《Plasma Science and Technology》 SCIE EI CAS CSCD 2005年第3期2822-2824,共3页
Neutral Beam Injection control system (NBICS) is constructed to measure the plasma current, Magnet current, vacuum pressure, cryopump temperature, control water cooling, filament voltage, and power supply, etc. The NB... Neutral Beam Injection control system (NBICS) is constructed to measure the plasma current, Magnet current, vacuum pressure, cryopump temperature, control water cooling, filament voltage, and power supply, etc. The NBICS, consisting mainly of a Programmable Logic Controller (PLC) subsystem, data acquisition and processing subsystem and cryopump and vacuum pressure monitoring subsystem, has successfully been used on a NBI device. In this article, the design of NBICS on HT-7 is discussed and each subsystem is described in particular. In addition, some experimental results are reported which are very important data for further research related to the HT-7 tokamak. 展开更多
关键词 neutral beam injection data acquisition MONITORING PLC control NETWORK
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Data Processing Middleware in a High-Powered Neutral Beam Injection Control System 被引量:1
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作者 盛鹏 胡纯栋 +4 位作者 宋士花 刘智民 赵远哲 张小丹 窦少彬 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第6期593-598,共6页
A set of data-processing middleware for a high-powered neutral beam injection(NBI) control system is presented in this paper.The middleware,based on TCP/IP and multi-threading technologies,focuses mainly on data pro... A set of data-processing middleware for a high-powered neutral beam injection(NBI) control system is presented in this paper.The middleware,based on TCP/IP and multi-threading technologies,focuses mainly on data processing and transmission.It separates the data processing and compression from data acquisition and storage.It provides universal transmitting interfaces for different software circumstances,such as WinCC,LabView and other measurement systems. The experimental data acquired on Windows,QNX and Linux platforms are processed by the middleware and sent to the monitoring applications.There are three middleware deployment models:serial processing,parallel processing and alternate serial processing.By using these models,the middleware solves real-time data-processing problems on heterogeneous environmental acquisition hardware with different operating systems and data applications. 展开更多
关键词 neutral beam injection control system MIDDLEWARE MULTITHREADING
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Numerical Calculation of the Attenuation of Neutral Beam Injection on HL-2A 被引量:1
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作者 余德良 严龙文 钟光武 《Plasma Science and Technology》 SCIE EI CAS CSCD 2006年第3期265-268,共4页
The arrangement of the neutral beam line in HL-2A tokamak is introduced. Attenuation of neutral beam injection is analyzed numerically under different plasma conditions: different plasma densities, beam energies, ele... The arrangement of the neutral beam line in HL-2A tokamak is introduced. Attenuation of neutral beam injection is analyzed numerically under different plasma conditions: different plasma densities, beam energies, electron temperatures, and impurity concentrations. Both optimized plasma density and beam energy for plasma heating are obtained. 展开更多
关键词 neutral beam injection attenuation ratio shine through ratio
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Numerical and Experimental Evaluation of Shine-Through Loss and Beam Heating Due to Neutral Beam Injection on EAST 被引量:1
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作者 Jin-Fang Wang Ying-Ying Li +13 位作者 Bin Wu Yu-Qing Chen Jun Li Yong-Jian Xu Long-Xi Chen Bao-Long Hao Deng Zhou Juan Huang Si-Ye Ding Zhen Yang Ya-Wei Hou Xiao-Juan Liu Nong Xiang Institute of Plasma Physi 《Chinese Physics Letters》 SCIE CAS CSCD 2021年第5期46-50,共5页
This research applies experimental measurements and NUBEAM,ONETWO and TRANSP modules to investigate the shine-through(ST)loss ratio and beam heating percentage of neutral beam injection on EAST.Measurements and simula... This research applies experimental measurements and NUBEAM,ONETWO and TRANSP modules to investigate the shine-through(ST)loss ratio and beam heating percentage of neutral beam injection on EAST.Measurements and simulations confirm that the ST loss ratio increases linearly with beam energy,and decreases exponentially with plasma density.Moreover,using the multi-step fitting method,we present analytical quantitative expressions of ST loss ratio and beam heating percentage,which are valuable for the high parameter long-pulse experiments of EAST. 展开更多
关键词 Numerical and Experimental Evaluation of Shine-Through Loss and beam Heating Due to neutral beam injection on EAST
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Numerical Simulation of Subcooled Boiling Inside High-Heat-Flux Component with Swirl Tube in Neutral Beam Injection System
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作者 陶玲 胡纯栋 谢远来 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第5期512-520,共9页
In order to realize steady-state operation of the neutral beam injection(NBI) system with high beam energy,an accurate thermal analysis and a prediction about working conditions of heat-removal structures inside hig... In order to realize steady-state operation of the neutral beam injection(NBI) system with high beam energy,an accurate thermal analysis and a prediction about working conditions of heat-removal structures inside high-heat-flux(HHF) components in the system are key issues.In this paper,taking the HHF ion dump with swirl tubes in NBI system as an example,an accurate thermal dynamic simulation method based on computational fluid dynamics(CFD) and the finite volume method is presented to predict performance of the HHF component.In this simulation method,the Eulerian multiphase method together with some empirical corrections about the inter-phase transfer model and the wall heat flux partitioning model are considered to describe the subcooled boiling.The reliability of the proposed method is validated by an experimental example with subcooled boiling inside swirl tube.The proposed method provides an important tool for the refined thermal and flow dynamic analysis of HHF components,and can be extended to study the thermal design of other complex HHF engineering structures in a straightforward way.The simulation results also verify that the swirl tube is a promising heat removing structure for the HHF components of the NBI system. 展开更多
关键词 neutral beam injection system swirl tube subcooled boiling computational fluid dynamics high-heat-flux component ion dump
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Optic diagnosis of neutral beam injection on HL-1M
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作者 郑银甲 冯震 +3 位作者 雷光玖 姜韶风 卢大伦 罗俊林 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第2期1207-1214,共8页
During the operation of a high-power neutral beam injection (NBI) system on theHL-1M tokamak, an optical diagnostic means using CCD camera was developed to characterize theNBI performance. The vacuum valve opening pro... During the operation of a high-power neutral beam injection (NBI) system on theHL-1M tokamak, an optical diagnostic means using CCD camera was developed to characterize theNBI performance. The vacuum valve opening process and NBI period in the HL-1M experimentwere displayed by a lot of photos taken with this means. Thus, the Hα emission profiles of theneutral beam (NB) and its interaction with plasma were given. Finally, the reason possible forplasma breakdown during NBI mode Ⅱ discharge was investigated. Therefore, this in-situ diagnosiscan provide more information of the NBI. 展开更多
关键词 NB Optic diagnosis of neutral beam injection on HL-1M MODE HL CCD
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Studies of beam ion confinement to enhance plasma performance on EAST
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作者 Jing FU Juan HUANG +21 位作者 Jinfang WANG Limin YU Cheonho BAE Jiafeng CHANG Kaiyang HE Yueheng HUANG Pan LI Wei GAO Yifei JIN Tianqi JIA Minrui WANG Yanxu SUN Chang SHI Shusong WANG Xihui WANG Hailin ZHAO Yifeng ZHENG Yahong XIE Guoqiang ZHONG Qing ZANG Haiqing LIU Jinping QIAN 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第12期18-30,共13页
A key physics issue for achieving steady-state high-performance plasmas on EAST tokamak is to decrease beam-ion losses to improve plasma confinement during neutral beam injections(NBIs).To decrease the beam losses,pre... A key physics issue for achieving steady-state high-performance plasmas on EAST tokamak is to decrease beam-ion losses to improve plasma confinement during neutral beam injections(NBIs).To decrease the beam losses,previous counter-I_(p)NBI injections are upgraded to co-I_(p)injections.Analysis shows that due to the reversed direction of drift across the flux surfaces caused by the pitch angle,the beam prompt loss fraction decreases from about 49%to 3%after the upgrade.Moreover,because of the change of entire beam path,beam shine-through(ST)loss fraction for counter-I_(p)tangential and counter-I_(p)perpendicular injections is reversed to co-I_(p)tangential and co-I_(p)perpendicular injections,respectively.Due to the change in the initial trapped-confined beam ion fraction caused by the peaked pitch profiles,the losses induced by toroidal ripple field are also reversed after the upgrade.To further improve the beam-ion confinement under the present NBI layout,the amplitudes of toroidal field are increased from 1.75 to 2.20 T.Result shows that,due to the smaller orbit width and peaked pitch angle profile,the beam prompt loss power is lower with higher toroidal field.Due to the synergy of higher initial trapped-confined beam ion fraction and narrower Goldston-White-Boozer(GWB)boundary,the loss induced by ripple diffusion is higher with higher toroidal field.The combined effect of beam ST loss,prompt loss and ripple loss,contributes to the increase in beam ion density.The decrease in beam loss power enhances beam heating efficiency,especially the fraction of beam heating ions.Finally,comparison between simulation and measurement by^(235)U fission chamber(FC)indicates that the increase in neutron rate is mainly contributed by improvement of beam-ion confinement.This study can provide potential support for beam operation and high-T_(i)experiment on EAST tokamak. 展开更多
关键词 beam-ion losses plasma performance neutral beam injections TOKAMAK
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The Supervisory Control System for the HL-2A Neutral Beam Injector 被引量:5
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作者 李波 李立 +8 位作者 冯鲲 王雪云 杨家兴 黄治辉 康自华 王明伟 张国庆 雷光玖 饶军 《Plasma Science and Technology》 SCIE EI CAS CSCD 2009年第3期374-376,共3页
Supervisory control and protection system of the neutral beam injector (NBI) in the HL-2A tokamak is presented. The system is used for a safe coordination of all the main NBI subsystems. Because the system is based ... Supervisory control and protection system of the neutral beam injector (NBI) in the HL-2A tokamak is presented. The system is used for a safe coordination of all the main NBI subsystems. Because the system is based on computer networks with its transmission medium of optical fiber, its advantages in high operational stability, reliability, security and flexible functional expandability are clearly shown during the NBI commissioning and heating experiment in HL-2A. 展开更多
关键词 control timing sequence INTERLOCK PROTECTION ISOLATION neutral beam injection
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Development of Distributed Control System for Neutral Beam Injector on EAST 被引量:1
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作者 盛鹏 胡纯栋 +6 位作者 崔庆龙 赵远哲 张小丹 张睿 林宇莲 虞珊 高洋洋 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第7期601-606,共6页
A distributed control system of Neutral Beam Injector (NBI) on the Experimental Advanced Superconducting Tokamak (EAST-NBI) is briefly presented in this paper. The control system is developed in accordance with th... A distributed control system of Neutral Beam Injector (NBI) on the Experimental Advanced Superconducting Tokamak (EAST-NBI) is briefly presented in this paper. The control system is developed in accordance with the experimental operational characteristics of the EAST- NBI. The NBI control system (NBICS), which is based on the computer network technologies and classified according to the control levels, consists of three levels: a remote monitoring layer, a server control layer, and a field control layer. The 3-layer architecture is capable of extending the system functions and upgrading devices. The timing system provides the reference clock of the synchronization and interlock for the EAST-NBI system. An interlock system ensures the safety of the experiment operators and field devices. Both of the ion sources of the beamline are designed to operate independently. This lays an important foundation for developing a control system for the second beamline on EAST. Experimental results demonstrate that the NBICS meets functional requirements of the EAST-NBI control, and makes experimental operations visual and automatic. 展开更多
关键词 neutral beam injection control system EAST distributed control system
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Simulations of Neutral Beam Ion Ripple Loss on EAST 被引量:1
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作者 李吉波 丁斯晔 +1 位作者 吴斌 胡纯栋 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第1期78-82,共5页
Predictions on the ripple loss of neutral beam fast ions on EAST are investigated with a guiding center code, including both ripple and collisional effects. A 6% to 16% loss of neutral beam ions is predicted for typic... Predictions on the ripple loss of neutral beam fast ions on EAST are investigated with a guiding center code, including both ripple and collisional effects. A 6% to 16% loss of neutral beam ions is predicted for typical EAST experiments, and a synergistic enhancement of fast ion loss is found for toroidal field (TF) ripples with collisions. The lost ions are strongly localized and will cause a maximum heat load of - 0.05 MW/m^2 on the first wall. 展开更多
关键词 ripple loss neutral beam injection EAST
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Design of the Prototype Negative Ion Source for Neutral Beam Injector at ASIPP 被引量:1
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作者 WEI Jianglong XIE Yahong +9 位作者 LIANG Lizhen GU Yuming YI Wei LI Jun HU Chundong XIE Yuanlai JIANG Caichao TAO Ling SHENG Peng XU Yongjian 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第9期954-959,共6页
In order to support the design, manufacture and commissioning of the negative- ion-based neutral beam injection (NBI) system for the Chinese Fusion Engineering Test Reactor (CFETR), the Hefei utility negative ion ... In order to support the design, manufacture and commissioning of the negative- ion-based neutral beam injection (NBI) system for the Chinese Fusion Engineering Test Reactor (CFETR), the Hefei utility negative ion test equipment with RF source (HUNTER) was proposed at ASIPP. A prototype negative ion source will be developed at first. The main bodies of plasma source and accelerator of the prototype negative ion source are similar to that of the ion source for EAST-NBI. But instead of the filament-arc driver, an RF driver is adopted for the prototype negative ion source to fulfill the requirement of long pulse operation. A cesium seeding system and a magnetic filter are added for enhancing the negative ion density near the plasma grid and minimizing co-extracted electrons. Besides, an ITER-like extraction system is applied inside the accelerator, where the negative ion beam is extracted and accelerated up to 50 kV. 展开更多
关键词 negative ion source neutral beam injection CFETR
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Influence of magnetic filter field on the radio-frequency negative hydrogen ion source of neutral beam injector for China Fusion Engineering Test Reactor 被引量:1
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作者 Yingjie WANG Jiawei HUANG +2 位作者 Yuru ZHANG Fei GAO Younian WANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2021年第11期185-192,共8页
In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Ga... In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Gauss in the driver region,destabilizing the discharge.The magnetic shield technique is proposed in this work to reduce the magnetic field in the driver region and improve the discharge characteristics.In this paper,a three-dimensional fluid model is developed within COMSOL to study the influence of the magnetic shield on the generation and transport of plasmas in the negative hydrogen ion source.It is found that when the magnetic shield material is applied at the interface of the expansion region and the driver region,the electron density can be effectively increased.For instance,the maximum of the electron density is 6.7×10^(17)m^(-3)in the case without the magnetic shield,and the value increases to 9.4×10^(17)m^(-3)when the magnetic shield is introduced. 展开更多
关键词 radio-frequency negative hydrogen ion sources three-dimensional fluid model neutral beam injection
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Calculation of Neutral Beam Injected Torque and Its Effective Tangency Major Radius for EAST
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作者 伍兴权 万宝年 +3 位作者 吕波 吴斌 王进芳 胡纯栋 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第7期545-551,共7页
Toroidal rotation has been recognized to have significant effects on the transport and magnetohydrodynarnic(MHD) stability of tokamak plasmas.Neutral beam injection(NBI) is the most effective rotation generation m... Toroidal rotation has been recognized to have significant effects on the transport and magnetohydrodynarnic(MHD) stability of tokamak plasmas.Neutral beam injection(NBI) is the most effective rotation generation method on current,tokamak devices.To estimate the effective injected torque of the first neutral beam injection system on EAST,a simplified analytic method was derived.Calculated beam torque values were validated by those obtained from the NUBEAM code simulation.According to the results,for the collisional torque,the effective tangential radius for torque deposition is close to the beam tangency major radius.However,due to the dielectric property of tokamak plasma,the equivalent tangency major radius of the J×B torque is equal to the average major radius of the magnetic flux surface.The results will be useful for the research of toroidal momentum confinement and the experimental analysis of momentum transport related with NBI on EAST. 展开更多
关键词 neutral beam injection TORQUE tangency major radius NUbeam
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Analysis of the Pipe Heat Loss of the Water Flow Calorimetry System in EAST Neutral Beam Injector
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作者 HU Chundong CHEN Yu +4 位作者 XU Yongjian YU Ling LI Xiang ZHANG Weitang NBI Group 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第11期1139-1142,共4页
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... 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. 展开更多
关键词 water flow calorimetry power deposition neutral beam injection heat loss
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Analysis of the characteristics of the plasma of an RF driven ion source for a neutral beam injector
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作者 Yongjian XU Li ZHANG +5 位作者 Chundong HU Yahong XIE Caichao JIANG Jianglong WEI Lizhen LIANG Yuanlai XIE 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第2期109-114,共6页
A radio frequency(RF)driven ion source is a very important component of a neutral beam injector for large magnetic confinement fusion devices.In order to study the key technology and physics of an RF driven ion source... A radio frequency(RF)driven ion source is a very important component of a neutral beam injector for large magnetic confinement fusion devices.In 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 Sciences.In this paper,a two-dimensional fluid model is used to simulate the fundamental physical characteristics of RF plasma discharge.Simulation results show the relationship of the characteristics of plasma(such as electron density and electron temperature)and RF power and gas pressure.In order to verify the effectiveness of the model,the characteristics of the plasma are investigated using a Langmuir probe.In this paper,experimental and simulation results are presented,and the possible reasons for the discrepancies between them are given.This paper can help us understand the characteristics of RF plasma discharge,and give a basis for further R&D for an RF ion source. 展开更多
关键词 RF ion source numerical simulation neutral beam injection inductive coupled plasma
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Analysis of Power Distribution on Beamline Components at Different Neutralization Efficiencies on NBI Test Stand
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作者 栗翔 许永建 +3 位作者 于玲 陈宇 胡纯栋 陶玲 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第12期1215-1219,共5页
Neutral beam injection is recognized as one of the most effective means for plasma heating. According to the research plan of the EAST physics experiment, two sets of neutral beam injector(4–8 MW, 10–100 s) were b... Neutral beam injection is recognized as one of the most effective means for plasma heating. According to the research plan of the EAST physics experiment, two sets of neutral beam injector(4–8 MW, 10–100 s) were built and operated in 2014. Neutralization efficiency is one of the important parameters for neutral beam. High neutralization efficiency can not only improve injection power at the same beam energy, but also decrease the power deposited on the heat-load components in the neutral beam injector(NBI). This research explores the power deposition distribution at different neutralization efficiencies on the beamline components of the NBI device. This work has great significance for guiding the operation of EAST-NBI, especially in long pulse and high power operation, which can reduce the risk of thermal damage of the beamline components and extend the working life of the NBI device. 展开更多
关键词 neutral beam injection power distribution neutralization efficiency
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