Overview of Development Status for EAST-NBI System

Hu, Chundong; Xie, Yahong; Xie, Yuanlai; Liu, Sheng; Xu, Yuanyuan; Liang, Lizhen; Jiang, Caichao; Peng, Sheng; Gu, Yuming; Li, Jun; Liu, Zhimin

doi:10.1088/1009-0630/17/10/02

Cited by 87 publications

(50 citation statements)

References 34 publications

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“…The NBI system in EAST (Hu et al. 2015) has four beam sources, with two in co-current direction and the other two in counter-current direction, which is key to demonstrate the effect of EP concentration on fishbones. Step-injected NBI power was applied to scan the pressure ratio of EPs.…”

Section: Experimental Set-up and Observationsmentioning

confidence: 99%

Dependence of fishbone cycle on energetic particle intensity in EAST low-magnetic-shear plasmas

et al. 2020

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The dependence of fishbone cycle on energetic particle intensity has been investigated in EAST low-magnetic-shear plasmas. It is observed that the fishbone mode growth rate, saturation amplitude as well as fishbone cycle frequency clearly increase with increasing neutral beam injection (NBI) power. Moreover, enhanced electron density and temperature perturbations as well as energetic particle loss were observed with greater injected NBI power. Simulation results using M3D-K code show that as the NBI power increases, the resonant frequency and the energy of the resonant particles become higher, and the saturation amplitude of the mode also changes, due to the non-perturbative energetic particle contribution. The relationship between the calculated energetic particle pressure ratio and fishbone cycle frequency is obtained as ${f_{\textrm{FC}}} = 2.2{(1000{\beta _{\textrm{ep,calc}}} - 0.1)^{5.9 \pm 0.5}}$ . Results consistent with the experimental observations have been achieved based on a predator–prey model.

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Section: Experimental Set-up and Observationsmentioning

confidence: 99%

Dependence of fishbone cycle on energetic particle intensity in EAST low-magnetic-shear plasmas

et al. 2020

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“…Due to the achievements of the BATMAN and MANITU test facilities at IPP-Garching [18][19][20][21], they were taken as references during the design process of the test equipment here. Besides, several mature techniques or instruments from the EAST NBI system [22] were applied to the test equipment. It is designed to allow a flexible diagnostic access and a utility application to different design concepts.…”

Section: System Descriptionmentioning

confidence: 99%

Hefei utility negative ions test equipment with RF source: commissioning and first results

Wei

Xie

Jiang

et al. 2018

Plasma Sci. Technol.

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In order to study the key technology and physics of RF driven negative ion source for neutral beam injector in China, the Hefei utility negative ions test equipment with RF source was developed at Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). Its negative ion source can be equipped with single or double RF drivers. There is a plasma expansion chamber with depth of 19 mm and an enhanced filter field. A three electrodes negative ion accelerator was employed to extract and accelerate the negative ions, which are plasma grid, extraction grid and ground grid. And there are several diagnostic tools for the plasma and beam parameters measurement. The characteristics of plasma generation, negative ion production and extraction were studied on the test equipment. The negative ion beam was extracted from the RF driven negative ion source for the first time. The detailed structure and main results are presented in this article.

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“…In order to support the physical research of the Experimental Advanced Superconducting Tokamak (EAST), two beamlines of neutral beam injection (NBI) have been developed [1][2][3]. The ion sources are the important part of the beamlines.…”

Section: Introductionmentioning

confidence: 99%

Development of data acquisition and over-current protection systems for a suppressor-grid current with a neutral-beam ion source

Liu

et al. 2017

Plasma Sci. Technol.

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Neutral beam injection is one of the effective auxiliary heating methods in magnetic-confinementfusion experiments. In order to acquire the suppressor-grid current signal and avoid the grid being damaged by overheating, a data acquisition and over-current protection system based on the PXI (PCI eXtensions for Instrumentation) platform has been developed. The system consists of a current sensor, data acquisition module and over-current protection module. In the data acquisition module, the acquired data of one shot will be transferred in isolation and saved in a data-storage server in a txt file. It can also be recalled using NBWave for future analysis. The over-current protection module contains two modes: remote and local. This gives it the function of setting a threshold voltage remotely and locally, and the forbidden time of over-current protection also can be set by a host PC in remote mode. Experimental results demonstrate that the data acquisition and overcurrent protection system has the advantages of setting forbidden time and isolation transmission.

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Overview of Development Status for EAST-NBI System

Cited by 87 publications

References 34 publications

Dependence of fishbone cycle on energetic particle intensity in EAST low-magnetic-shear plasmas

Dependence of fishbone cycle on energetic particle intensity in EAST low-magnetic-shear plasmas

Hefei utility negative ions test equipment with RF source: commissioning and first results

Development of data acquisition and over-current protection systems for a suppressor-grid current with a neutral-beam ion source

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