Results 51 to 60 of about 4,890 (116)

Negative Ions and Charge Neutralization in the Cyclotron [PDF]

Review of Scientific Instruments, 1951
Evidence is given for the presence of negative hydrogen ions in the synchrocyclotron. They are lost by charge neutralization before they reach an energy of about 3 Mev. Protons have been made to circulate in the cyclotron without acceleration after they have reached an energy of 5 to 22 Mev and are found to be lost with a half-life of ⅓ to 2 seconds.
openaire   +3 more sources

Cesiated surface H− ion source: optimization studies

New Journal of Physics, 2017
The H ^− ion beam intensity required for high-energy and high-intensity proton accelerators is continuously increasing. The required 95%-beam transverse normalized root mean square emittance ( ε _95%rnms _x _/ _y ) of the beam is around 0.25 π mm mrad ...
Akira Ueno
doaj   +1 more source

Conceptional design of photoneutralization test system for negative ion-based neutral beam injection

Nuclear Engineering and Technology
Neutral beam injection is one of the effective heating methods in the field of magnetic confinement fusion, and neutralization is the most crucial link in the case of negative ions.
Hui-hui Hong, Li-zhen Liang, Yuan-lai Xie, Qian-xu Wang, Zhuo Pan, Yao Jiang   +5 more
doaj   +1 more source

Development and morphological characterization of ion wind in an inhomogeneous DC field

AIP Advances, 2019
Ion wind is a concomitant phenomenon arising from the process of discharge development, and is widely used in heat dissipation and ion neutralisation. The morphology characterization of ion wind was observed using a photo-electric joint monitoring system
Ping Wang, Jingxuan Song, Haoou Ruan, Fangcheng Lv, Jianghai Geng, Xinyu Wang   +5 more
doaj   +1 more source

Negative ion research at the Culham Centre for Fusion Energy (CCFE)

New Journal of Physics, 2016
A summary of negative ion development work being presently undertaken at the Culham Centre for Fusion Energy is given. The small negative ion facility has an RF driven volume ion source with beam extraction at energies up to 30 keV. The extracted beam of
R McAdams, A J T Holmes, D B King, E Surrey, I Turner, J Zacks   +5 more
doaj   +1 more source

Ion-impact secondary emission in negative corona with photoionization

AIP Advances, 2017
A corona discharge measurement system and simulation model are presented to investigate the effects of photoionization and ion-impact secondary emission process in negative corona discharge.
B. X. Lu, H. Y. Sun
doaj   +1 more source

Progress of CRAFT negative ion source neutral beam injection test facility

Nuclear Fusion
The Comprehensive Research Facility for Fusion Technology (CRAFT) is a national large research infrastructure in China. CRAFT aims to develop the key technologies for future fusion reactor and the negative ion source neutral beam injection (NNBI) is one ...
Jianglong Wei, Wei Liu, Yongjian Xu, Yuming Gu, Yahong Xie, Na Wang, Bo Liu, Dmitrii Stepanov, Shengmin Pan, Zhigang Zhu, Bin Guo, Xiancai Meng, Xufeng Peng, Hao Wu, Liang Zhang, Chundong Hu, Lizhen Liang, CRAFT NNBI Team   +17 more
doaj   +1 more source

Dual-drift Tube Ion Mobility Spectrometry Based on Corona Discharge Ionization Source

Zhipu Xuebao
Ion mobility spectrometry (IMS) is a trace detection technique operating at atmospheric pressure. It is widely utilized in various fields, such as explosives and drug detection, chemical warfare agent detection, and biomedical applications, due to its ...
Xu ZHANG, Yu SONG, Yuan-jiang LUO, Wan-jun LI, Ling-wen KONG, Lei XIA, Ya-wei LIU, Cheng-yin SHEN, Chao-qun HUANG, Yan-nan CHU   +9 more
doaj   +1 more source

Kinetic Insights into Na Ion Transfer at the Carbon‐Based Negative Electrode/Electrolyte Interfaces for Sodium‐Ion Batteries

ChemElectroChem
The relentless quest for sustainable and efficient energy storage solutions has propelled sodium‐ion batteries (SIBs) to the forefront of research and development in the realm of rechargeable batteries.
Prof. Dr. Shota Tsujimoto, Prof. Dr. Changhee Lee, Ryoich Nunokawa, Yeji Kim, Prof. Dr. Yuto Miyahara, Prof. Dr. Kohei Miyazaki, Prof. Dr. Takeshi Abe   +6 more
doaj   +1 more source

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