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View article: CIGALE: an innovative gas neutralizer based high efficiency neutral beam injector concept for future fusion reactors
CIGALE: an innovative gas neutralizer based high efficiency neutral beam injector concept for future fusion reactors Open
This paper outlines the main features of a new high efficiency ( η > 62%) high power (∼18 MW D 0 ) neutral beam (NB) concept based on pragmatic solutions suitable with the reactor requirements. The injector is modular (several beamlines in…
View article: Optimizing the ITER NBI ion source by dedicated RF driver test stand
Optimizing the ITER NBI ion source by dedicated RF driver test stand Open
The experimental fusion reactor ITER will feature two (or three) heating neutral beam injectors (NBI) capable of delivering 33(or 50) MW of power into the plasma. A NBI consists of a plasma source for production of negative ions (extracted…
View article: Characterization of plasmas in negative ion sources using a Cs-H Collisional Radiative model
Characterization of plasmas in negative ion sources using a Cs-H Collisional Radiative model Open
SPIDER, hosted at the Neutral Beam Test Facility (NBTF) in Padova, Italy, is the full scale prototype for the ITER Heating Neutral Beam (HNB) source. Another smaller compact RF ion source, NIO1, hosted by Consorzio RFX, was built to study …
View article: Continuous pulse advances in the negative ion source NIO1
Continuous pulse advances in the negative ion source NIO1 Open
Consorzio RFX and INFN-LNL have designed, built and operated the compact radiofrequency negative ion source NIO1 (Negative Ion Optimization phase 1) with the aim of studying the production and acceleration of H - ions. In particular, NIO1 …
View article: Highlights of recent SPIDER results and improvements
Highlights of recent SPIDER results and improvements Open
Three years of experiments on SPIDER allowed characterization of the main features of the source plasma and of the negative ion beam, in the original design configuration. For the large dimensions of the source chamber, and of the extracti…
View article: Design and Development of a Diagnostic System for a Non-Intercepting Direct Measure of the SPIDER Ion Source Beamlet Current
Design and Development of a Diagnostic System for a Non-Intercepting Direct Measure of the SPIDER Ion Source Beamlet Current Open
Stable and uniform beams with low divergence are required in particle accelerators; therefore, beyond the accelerated current, measuring the beam current spatial uniformity and stability over time is necessary to assess the beam performanc…
View article: Direct current measurements of the SPIDER beam: a comparison to existing beam diagnostics
Direct current measurements of the SPIDER beam: a comparison to existing beam diagnostics Open
For negative ion beam sources there are several methods of measuring the accelerated beam current, most commonly electrical measurements at the power supply and calorimetric measurements. On SPIDER, the ITER Heating Neutral Beam full-scale…
View article: Direct current measurements of the SPIDER beam: a comparison to existing beam diagnostics
Direct current measurements of the SPIDER beam: a comparison to existing beam diagnostics Open
For negative ion beam sources there are several methods of measuring the accelerated beam current, most commonly electrical measurements at the power supply and calorimetric measurements. On SPIDER, the ITER Heating Neutral Beam full-scale…
View article: First characterization of the SPIDER beam AC component with the Beamlet Current Monitor
First characterization of the SPIDER beam AC component with the Beamlet Current Monitor Open
SPIDER is the full scale prototype for the ITER Heating Neutral Beam source, hosted at the Neutral Beam Test Facility in Padova, Italy. The behavior of the beam must be thoroughly investigated to bring the machine's performance in line wit…
View article: Investigations on Caesium Dispersion and Molybdenum Coating on SPIDER Components
Investigations on Caesium Dispersion and Molybdenum Coating on SPIDER Components Open
SPIDER is the 100 keV full-size Negative Ion Source prototype of the ITER Neutral Beam Injector, operating at Consorzio RFX in Padova, Italy. The largest Negative Ion Source in the world, SPIDER generates an RF driven plasma from which Deu…
View article: Continuous pulse advances in the negative ion source NIO1
Continuous pulse advances in the negative ion source NIO1 Open
Consorzio RFX and INFN-LNL have designed, built and operated the compact radiofrequency negative ion source NIO1 (Negative Ion Optimization phase 1) with the aim of studying the production and acceleration of H- ions. In particular, NIO1 w…
View article: Initial Results From the SPIDER Beamlet Current Diagnostic
Initial Results From the SPIDER Beamlet Current Diagnostic Open
Source for the production of ions of deuterium extracted from a radio frequency plasma (SPIDER) is the full-scale prototype for the ITER heating neutral beam (HNB) source. Beam operation in SPIDER, with the eventual aim of achieving 100-ke…
View article: Spatially resolved diagnostics for optimization of large ion beam sources
Spatially resolved diagnostics for optimization of large ion beam sources Open
Giant negative ion sources for neutral beam injectors deliver huge negative ion currents, thanks to their multi-beamlet configuration. As the single-beamlet optics defines the transmission losses along the beamline, the extraction of a sim…
View article: Development of a Collisional Radiative Model for Hydrogen-Cesium Plasmas and Its Application to SPIDER
Development of a Collisional Radiative Model for Hydrogen-Cesium Plasmas and Its Application to SPIDER Open
SPIDER is the full scale prototype for the ITER Heating Neutral Beam (HNB) source. The production of negative ions in the source mostly relies on the conversion of H/D atoms and positive ions on a 1.6 m x 0.8 m converter surface, which is …
View article: A Temperature Programmed Desorption Diagnostic for SPIDER Cs Operations
A Temperature Programmed Desorption Diagnostic for SPIDER Cs Operations Open
Cesium evaporation, aimed at enhancing the production of negative ions, has recently started during the last experimental campaigns in Source for the Production of Ions of Deuterium Extracted from a Radio frequency plasma (SPIDER). In view…
View article: Helicon wave plasma generated by a resonant birdcage antenna: magnetic field measurements and analysis in the RAID linear device
Helicon wave plasma generated by a resonant birdcage antenna: magnetic field measurements and analysis in the RAID linear device Open
This paper describes a helicon-wave-sustained plasma generated by a novel birdcage antenna with cosine azimuthal current distribution. The resonant birdcage source maintains a stable intense plasma column from low (300 W) to high (10 kW) s…
View article: Physics of helicon waves and negative ions in the Resonant Antenna Ion Device (RAID)
Physics of helicon waves and negative ions in the Resonant Antenna Ion Device (RAID) Open
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