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Experimental evaluation of a negative-ion source for a heavy-ion fusion negative-ion driver [PDF]
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2005 Abstract Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy-ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photodetached to neutrals (Nucl. Instr. and Meth. A 464 (2001) 315; Fusion Sci. Technol.
Grisham, L. R. +4 more
core +7 more sources
A negative ion source for alkali ions [PDF]
Nuclear Instruments and Methods, 1980 An ion source is described which delivers negative alkali ions. With this source, which consists of a duoplasmatron and a charge exchange canal with alkali vapour, negative Li, Na and K ions are produced. The oven in which alkali metals are evaporated can reach temperatures up to 575°C.
Vermeer, A., Zwol, N.A. van
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Response of negative ion beamlet width and axis deflection to RF field in beam extraction region [PDF]
Scientific ReportsBeam-divergence characteristics of single negative ion beamlet have been experimentally investigated with a superimposition of a controlled perturbation of a radio frequency wave (RF) field in a filament-arc discharge negative ion source. Oscillations of
Kenichi Nagaoka +9 more
doaj +2 more sources
Journal of Applied Physics, 2021 In this Tutorial, surface and double charge exchange negative ion sources for producing negative ion beams of different ion species will be described. The need for negative ions as the beam particles of tandem Van de Graaf accelerators and that for charge exchange injection of hydrogen negative ions into high-energy proton accelerators requires the ...
Bacal, M., Sasao, M., Wada, M.
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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 +10 more
doaj +1 more source
High-intensity negative ion sources [PDF]
Nuclear Instruments and Methods, 1963 The production of beams of negative deuterium ions was studied with two ion sources with geometries that could be employed in a cyclotron. The negative ions were extracted directly from the arc in a direction normal to the magnetic field without using a charge-exohange medium. With a high gas pressure in the arc and an arc current of 5 amp, a 2-ma beam
Ehlers, Kenneth W. +2 more
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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 +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 +9 more
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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 +6 more
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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 +6 more
doaj +1 more source