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 +4 more
doaj +1 more source
Long-pulse Operation of a Cesium-Seeded High-Current Large Negative Ion Source [PDF]
, 1997 "A high-power large negative ion source has been operated for a long pulse duration. A three-grid single-stage accelerator is used, where the extraction grid is shaped so that the secondary electrons generated on the extraction grid would be prevented ...
Oka, Y. +19 more
core +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
Visualization of H? Dynamics in Extraction Region of Negative-Ion Source by Hα Imaging Spectroscopy [PDF]
, 2013 We developed a new imaging spectroscopy diagnostic tool for Hα emission and installed it on a negative hydrogen ion (H?) source to investigate the H? dynamics in the extraction region.
KANEKO, Osamu +7 more
core +2 more sources
Characterization of the RF plasma in negative ion source NIO1 [PDF]
, 2022 The NIO1 experiment is a negative ion source built at Consorzio RFX, Padua, with the aim to investigate and optimize the negative ion production. With this purpose, a diagnostic of the plasma in the NIO1 source is essential.
Buonincontri, Laura
core
Negative ion source operation with deuterium [PDF]
, 2020 International audienceWhen the working gas of a negative ion source is changed from hydrogen to its isotope, deuterium, an 'isotope effect' is observed; namely, several plasma characteristics such as the electron energy distribution, the atomic fraction ...
Wada, M, Bacal, M.
core +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
Observation of Hydrogen and Cesium Spectra in a Negative Ion Source for a Neutral Beam Injector using a Multi-channel Spectrometer [PDF]
, 2007 Effective production of hydrogen negative ions (H-) is one of the important issues in high power neutral beam injection (NBI) for fusion experimental devices. Cesium (Cs) vapor is seeded in the H- sources to enhance the H- production rate, which depends
Takeiri, Y. +15 more
core +2 more sources
Multicusp negative ion source [PDF]
Review of Scientific Instruments, 1980 The characteristics of a steady state, surface conversion, multiline-cusp negative ion source have been investigated for the production of high-energy neutral beams. With the presence of cesium, this source has been operated at a neutral pressure of 1×10−3 Torr to generate a H− ion current greater than 400 mA.
K. W. Ehlers, K. N. Leung
openaire +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 +5 more
doaj +1 more source