Results 61 to 70 of about 1,118,371 (206)

Three-dimensional fluid simulation of radio-frequency negative hydrogen ion source with the addition of noble gases

Nuclear Fusion
As an essential part of the neutral beam injection system for the magnetic confinement fusion devices, radio-frequency (RF) ion source is responsible for generating negative hydrogen ions.
Chao Chen, Ning Liu, Miao Zhao, Guangjiu Lei, Dongping Liu, Xianjun Sheng   +5 more
doaj   +1 more source

New source of MeV negative ion and neutral atom beams [PDF]

, 2016
The scenario of "electron-capture and -loss" was recently proposed for the formation of negative ion and neutral atom beams with MeV kinetic energies.
Borghesi, M., Braenzel, J., Jequier, S., Prasad, R., Schnürer, M., Ter-Avetisyan, S., Tikhonchuk, V.   +6 more
core   +1 more source

Negative ion sources for neutral beam systems [PDF]

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1983
Neutral beams to heat the plasmas of controlled fusion experiments are generated by neutralizing the charge of positive ions after they have been focused and accelerated. The efficiency of this system decreases with ion velocity and for D+ the system is practical only at ion energies of less than about 150 keV,which is less than the energies expected ...
openaire   +3 more sources

Comparative experiments of different excitation frequency in a large-area RF negative ion source for NBI application

Nuclear Fusion
The excitation frequency is a critical parameter for the radio frequency (RF) ion source employed in the Neutral Beam Injection (NBI) system for the magnetic confinement fusion devices.
Na Wang, Bo Liu, Wei Liu, Xu-Feng Peng, Yu-Fan Li, Yu-Wen Yang, Yong-Jian Xu, Yu-Ming Gu, Cai-Chao Jiang, Ya-Hong Xie, Yuan-Lai Xie, Li-Zhen Liang, Jiang-Long Wei   +12 more
doaj   +1 more source

Development of plasma light monitoring system for high-power radio frequency negative ion source

He jishu
BackgroundNegative ion sources driven by radio frequency (RF) waves have become the preferred solution for future neutral beam injection systems.PurposeThis study aims to monitor the plasma discharge state of each exciter of a high power RF negative ion ...
LI Yufan, YANG Puqiong, WEI Jianglong, LIU Bo, PENG Xufeng, YANG Yuwen, LI Yuqian, XIE Yuanlai   +7 more
doaj   +1 more source

Simulations for the cesium dynamics of the RF-driven prototype ion source for CRAFT N-NBI

Nuclear Engineering and Technology
To realize an initial objective of the negative ion-based neutral beam injection (N-NBI) at the Comprehensive Research Facility for Fusion Technology (CRAFT) test facility, which targets an H0 beam power of 2 MW at an energy of 200–400 keV and a pulse ...
Yalong Yang, Yong Wu, Lizhen Liang, Jianglong Wei, Rui Zhang, Yahong Xie, Wei Liu, Chundong Hu   +7 more
doaj   +1 more source

Assessment of plasma uniformity in the extraction region of an RF-driven negative ion source for CRAFT NNBI

Nuclear Fusion
The uniformity of beam, for large RF negative ion source, is closely related to the plasma uniformity in the extraction region. The six electrostatic probes were installed above the plasma grid (PG) 5 mm to evaluate the plasma uniformity.
Xufeng Peng, Yongjian Xu, Yufan Li, Jianglong Wei, Guangyong Mei, Bo Liu, YuWen Yang, Na Wang, Junwei Xie, Yahong Xie, Lizhen Liang, Bin Wu   +11 more
doaj   +1 more source

Extraction and low energy transport of negative ions [PDF]

, 2005
High perveance negative ion beams with low emittance are essential for several next generation particle accelerators (i. g. spallation sources like ESS [1] and SNS [2]).
Jakob, Ansgar, Klein, Horst, Lakatos, Andreas, Pozimski, Jürgen   +3 more
core  

Modeling of plasma transport and negative ion extraction in a magnetized radio-frequency plasma source

New Journal of Physics, 2017
Negative ion sources for fusion are high densities plasma sources in large discharge volumes. There are many challenges in the modeling of these sources, due to numerical constraints associated with the high plasma density, to the coupling between plasma
G Fubiani, L Garrigues, G Hagelaar, N Kohen, J P Boeuf   +4 more
doaj   +1 more source

Проектное финансирование как современная форма развития инвестиционного кредитования [PDF]

, 2009
There is a constantly growing interest in biomedical research to visualize changes in the location of various biomolecules in tissue sections as a result of complex diseases.
Перзеке, Н.Б., Селезнева, А.Е.   +1 more
core