Article
Physics, Fluids & Plasmas
G. J. Lei, L. W. Yan, D. P. Liu, X. M. Zhang, M. Zhao, S. F. Geng, M. Li, Y. X. Zhang, Z. H. Bi, Y. N. Bu, W. M. Xie, G. Q. Zou, L. P. Huang, B. W. Zhou, H. Y. Fan, X. Z. Ma, Q. Yu, Bo Lu, Z. B. Shi, C. P. Zhou, M. Xu, X. R. Duan
Summary: A radiofrequency ion source with high power extraction has been developed for a neutral beam injector on HL-2A tokamak, showing satisfactory results in experiments.
Article
Physics, Fluids & Plasmas
Kunal Soni, Rodrigo Antunes, Roland Steiner, Lucas Moser, Laurent Marot, Ernst Meyer
Summary: This experimental investigation focuses on the ion flux-energy distribution functions obtained across grounded grids in an asymmetric capacitively coupled RF source using a helium discharge. The study demonstrates that confining plasma with grids can significantly reduce ion flux and wall sputtering rates, making it important for fusion devices and plasma processing applications.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Kazunori Takahashi, Ryoji Imai, Kengo Hanaoka
Summary: The study implemented a fast and automatically controlled frequency-tunable radiofrequency system in an RF plasma thruster, achieving accurate impedance matching and stable delivery of RF power. Results showed that increasing the RF power to 500 W led to discontinuous changes in thruster performance and ion energy distribution.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
M. Kashiwagi, J. Hiratsuka, M. Ichikawa, G. Q. Saquilayan, A. Kojima, H. Tobari, N. Umeda, K. Watanabe, M. Yoshida, L. Grisham
Summary: The negative-ion-based neutral beam injector (N-NBI) of JT-60SA has successfully demonstrated the emission of a hydrogen negative ion beam exceeding the requirements for the first time. It achieved an energy of 500 keV, a current density of 154 A m(-2), and a duration of 118 s. Proper temperature conditions for stable negative ion production and a fast cut-off system for arc current have been developed. The integration of these techniques enabled the successful demonstration of a stable beam over 100 s, contributing to the development of NBI systems for ITER and DEMO.
Article
Nuclear Science & Technology
Yahong Xie, Chundong Hu, Jianglong Wei, Yuming Gu, Lizhen Liang, Yongjian Xu, Caichao Jiang, Jun Li, Yuanzhe Zhao, Yuanlai Xie
Summary: The CRAFT device requires a negative neutral beam injector (NNBI) beam source with a beam energy of 400 keV, which is designed based on a RF plasma generator and a negative ion accelerator to meet the specific requirements of the system.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Physics, Fluids & Plasmas
O. Sotnikov, A. Ivanov, Yu Belchenko, A. Gorbovsky, P. Deichuli, A. Dranichnikov, I Emelev, V Kolmogorov, A. Kondakov, A. Sanin, I Shikhovtsev
Summary: The development of a high-voltage neutral beam injector based on negative hydrogen ions acceleration and neutralization is underway at Budker Institute of Nuclear Physics (BINP). The design incorporates innovative components including a multi-aperture negative ion source and magnetic system with concaved field lines. Experimental results demonstrate stable operation and efficiency of the injector.
Article
Energy & Fuels
Wei Liu, Bo Liu, Yuanzhe Zhao, Qinglong Cui, Chundong Hu, Lizhen Liang
Summary: This article presents the research on RF-driven negative ion source for neutral beam injection, focusing on enhancing negative ion yield through cesium injection. The design details of the cesium oven system and the application of constant temperature control system and surface ionization detector are described. Experimental and simulation analysis demonstrate the feasibility of the system design.
Article
Physics, Fluids & Plasmas
A. Brul, A. G. Abdrashitov, V. Kh Amirov, V. P. Belov, R. V. Vakhrushev, A. Gorbovskii, A. N. Dranichnikov, V. Davydenko, P. P. Deichuli, N. P. Deichuli, A. S. Donin, A. A. Ivanov, I. A. Ivanov, V. A. Kapitonov, V. V. Kolmogorov, S. Korepanov, V. V. Mishagin, V. V. Rashchenko, A. Sorokin, N. Stupishin
Summary: A high-power neutral beam injector with tunable beam energy was developed for plasma heating and stabilization in open magnetic traps, allowing for an increase in neutral beam power from 1.7 to 3.5 MW. This injector maintains constant ion beam current despite significant changes in accelerating voltage, and is used in experiments at the C-2W open trap in the USA.
PLASMA PHYSICS REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Eugenia Dlougach, Alexander Panasenkov, Boris Kuteev, Arkady Serikov
Summary: FNS-ST is a fusion neutron source project based on a spherical tokamak. This study focuses on the beam-plasma coupling issue and presents a method to achieve steady-state current drive and fusion controllability in beam-driven toroidal plasmas. The study demonstrates the efficient modeling of neutral beam production and the tokamak plasma response to NBI using a specialized software package.
APPLIED SCIENCES-BASEL
(2022)
Article
Nuclear Science & Technology
Chundong Hu, Jiaqi Lang, Yuanlai Xie, Mingxiang Wang, Xiaoxue Liu, Ning Tang, Zhiwei Cui, Si Zhang
Summary: This study demonstrated the structural design and manufacturing method of a cryosorption pump based on the actual needs of a negative ion based neutral beam injector (NNBI). The test system of the cryosorption pump test prototype was built to study the factors affecting pumping performance. The results showed stable pumping performance under different conditions, with an error within 35% between actual and theoretical pumping speeds.
FUSION ENGINEERING AND DESIGN
(2023)
Article
Nuclear Science & Technology
Annabelle Spanier, Dirk Hartmann, Simppa Aekaeslompolo, Oliver Ford, Niek den Harder, Bernd Heinemann, Christian Hopf, Roland Kairys, Paul McNeely, Peter Zs. Poloskei, Rudolf Riedl, Thilo Romba, Peter Rong, Norbert Rust, Ralf Schroeder, Robert C. Wolf
Summary: In 2018, the neutral beam injection (NBI) system at Wendelstein 7-X (W7-X) was operated for the first time, with detailed calorimetric measurements accurately determining the energy flow within the system and the injected power into the plasma. The study found that around 89% of the electric energy put into the system could be accounted for, with an injection of approximately 3.1 MW NBI power at an efficiency of about 33%.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Engineering, Aerospace
Svyatoslav Gordeev, Stepan Kanev, Andrey Melnikov, Igor Nazarenko, Sergey Khartov
Summary: The study examines the theoretical assessment of efficiency increase possibility for a radio-frequency ion injector using internal antennas, finding that the best characteristics can be obtained with a conical arrangement of turns which significantly reduces radio-frequency power consumption. Verification of the results through testing is planned for the future.
Article
Physics, Fluids & Plasmas
Yingjie Wang, Jiawei Huang, Yuru Zhang, Fei Gao, Younian Wang
Summary: This paper presents the use of magnetic shield technique to improve the discharge characteristics in the design of negative hydrogen ion sources. It is found that the magnetic shield can effectively increase electron density in the plasma generation and transport process.
PLASMA SCIENCE & TECHNOLOGY
(2021)
Article
Nuclear Science & Technology
Alberto Ferro, Francesco Lucchini, Piero Agostinetti, Daniele Ratti, Gustavo Granucci, Afra Romano, Roberto Romano, Antonio Cucchiaro, Alessandro Princiotta
Summary: The DTT is a new tokamak facility aimed at testing divertor magnetic configurations and technologies for DEMO. The conceptual design of the NBI includes solutions from ITER with simplifications for cost reduction, while also considering an innovative approach for the Acceleration Grid Power Supply.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Physics, Multidisciplinary
Nicola Fonnesu, Salvatore Scaglione, Ivan Panov Spassovsky, Pietro Zito, Antonino Pietropaolo
Summary: The SORGENTINA-RF project focuses on developing a 14 MeV fusion neutron source for producing medical radioisotopes, specifically Mo-99. The optimization of key parameters of the ion beam is crucial for maximizing neutron production rate. The study discusses a methodology to define the beam characteristics for effective and sustainable operation of the facility, and proposes considerations on the operation of the ion source and fuel cycle.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
