Results 1 to 10 of about 8,630,188 (308)

Experimental study on the effect of cesium injection on negative ion yield of high power negative ion source

He jishu, 2021
BackgroundCesium injection can significantly reduce the work function of plasma grid surface of the radio frequency (RF) negative ion source, which is an effective way to promote the surface generation and improve the yield of H- ions.PurposeThis study ...
WANG Haoming, HU Chundong, CHEN Shiyong, XU Yongjian, PAN Junjun, WEI Jianglong, LIU Wei, CUI Qinglong, XIE Yahong, XIE Yuanlai, LIANG Lizhen   +10 more
doaj   +1 more source

Development of negative muonium ion source for muon acceleration

Physical Review Accelerators and Beams, 2021
A negative muonium ion (Mu^{-}) source using an aluminum foil target (Al target) was developed as a low-energy muon source. Mu^{-} ions are produced by irradiating the Al target with a 3-MeV positive muon (μ^{+}) beam and observed using a microchannel ...
R. Kitamura, S. Bae, S. Choi, Y. Fukao, H. Iinuma, K. Ishida, N. Kawamura, B. Kim, Y. Kondo, T. Mibe, Y. Miyake, M. Otani, G. P. Razuvaev, N. Saito, K. Shimomura, P. Strasser   +15 more
doaj   +1 more source

Enhancing ion extraction with an inverse sheath in negative hydrogen ion sources for NBI heating

Nuclear Fusion, 2023
Negative hydrogen ion (H ^− ) sources employed in neutral beam injection (NBI) systems are subject to extraction efficiency issues due to the considerable volumetric losses of negative hydrogen ions.
Guang-Yu Sun, Wei Yang, Jian Chen, Hao-Min Sun, Bao-Hong Guo, Shu Zhang, Ying-Han Wang, Xiong Yang, An-Bang Sun, Guan-Jun Zhang   +9 more
doaj   +1 more source

Abundance ratio of multiple velocity distribution components in a single negative ion beamlet produced by a cesium-seeded negative ion source

AIP Advances, 2022
Well focused negative ion beams are required for neutral beam injection systems for heating and current drive in magnetically confined fusion plasma experiments.
Yasuaki Haba, Mitsutoshi Aramaki, Katsuyoshi Tsumori, Masaki Osakabe, Katsunori Ikeda, Haruhisa Nakano, Kenichi Nagaoka   +6 more
doaj   +1 more source

The conceptual design of NNBI electrostatic residual ion dump for fusion reactor

He jishu, 2022
BackgroundNegative ion source based on neutral beam injector is an important auxiliary heating and current driving system for the China Fusion Experimental Test Reactor (CFETR).
LI Chao, LIANG Lizhen, SHI Chao, YI Wei, XIE Yahong, XIE Yuanlai, HU Chundong   +6 more
doaj   +1 more source

Negative Hydrogen Ion Sources for Fusion: From Plasma Generation to Beam Properties

Frontiers in Physics, 2021
The neutral beam injection systems for the international fusion experiment ITER used for heating, current drive, and diagnostic purposes are based on RF-driven negative hydrogen ion sources with a source area of roughly 0.9 m × 1.9 m. The sources operate
U. Fantz, S. Briefi, A. Heiler, C. Wimmer, D. Wünderlich   +4 more
doaj   +1 more source

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

First Prototype of a Cesium Oven Design for Negative-Ion-Source-Based Neutral Beam Injector at ASIPP

Energies, 2022
The RF-driven negative ion source has a steady state characteristic and will be a promising ion source for neutral beam injection (NBI) in the future.
Wei Liu, Bo Liu, Yuanzhe Zhao, Qinglong Cui, Chundong Hu, Lizhen Liang   +5 more
doaj   +1 more source

Diagnostics tools and methods for negative ion source plasmas, a review

New Journal of Physics, 2017
Plasma parameter measurements for negative hydrogen (H ^− ) ion sources have been playing an important role in clarifying fundamental physics related to negative ion production and destruction processes. Measured data of beam properties, such as H ^− ion
Katsuyoshi Tsumori, Motoi Wada
doaj   +1 more source

Characteristics of negative ion generation in large area negative ion source based on cavity ring-down spectroscopy

He jishu
BackgroundThe neutral beam injection system (NBI) has the highest heating efficiency and the clearest physical mechanism, so it has become one of the main auxiliary heating methods used in the world's large magnetic confinement controlled thermonuclear ...
ZHU Tengsai, LIANG Lizhen, XIE Yahong, CAO Zhengkun, PENG Xufeng, HU Chundong   +5 more
doaj   +1 more source